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Card Arithmetic: OpenEnv environment and play page
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{"id": "test-24-0000", "level": "24", "target": 24, "cards": [{"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 7, "suit": "S", "label": "7♠"}], "solution": "3 * (7 + 8 - 7)", "solution_steps": ["7 + 8 = 15", "15 − 7 = 8", "3 × 8 = 24"], "key": "24-24-8♥7♦3♣7♠"}
{"id": "test-24-0001", "level": "24", "target": 24, "cards": [{"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 1, "suit": "D", "label": "A♦"}], "solution": "1 * (1 + 10 + 13)", "solution_steps": ["10 + 13 = 23", "1 + 23 = 24", "1 × 24 = 24"], "key": "24-24-K♦A♣10♦A♦"}
{"id": "test-24-0002", "level": "24", "target": 24, "cards": [{"rank": 10, "suit": "C", "label": "10♣"}, {"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 3, "suit": "D", "label": "3♦"}], "solution": "12 * (3 - (11 - 10))", "solution_steps": ["11 − 10 = 1", "3 − 1 = 2", "12 × 2 = 24"], "key": "24-24-10♣J♣Q♦3♦"}
{"id": "test-24-0003", "level": "24", "target": 24, "cards": [{"rank": 1, "suit": "S", "label": "A♠"}, {"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 8, "suit": "S", "label": "8♠"}], "solution": "6 * 8 / (1 + 1)", "solution_steps": ["1 + 1 = 2", "8 ÷ 2 = 4", "6 × 4 = 24"], "key": "24-24-A♠A♣6♠8♠"}
{"id": "test-24-0004", "level": "24", "target": 24, "cards": [{"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 3, "suit": "D", "label": "3♦"}, {"rank": 1, "suit": "S", "label": "A♠"}, {"rank": 5, "suit": "C", "label": "5♣"}], "solution": "(3 - 1) * (5 + 7)", "solution_steps": ["3 − 1 = 2", "5 + 7 = 12", "2 × 12 = 24"], "key": "24-24-7♠3♦A♠5♣"}
{"id": "test-24-0005", "level": "24", "target": 24, "cards": [{"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 13, "suit": "H", "label": "K♥"}], "solution": "5 * (13 - 8) - 1", "solution_steps": ["13 − 8 = 5", "5 × 5 = 25", "25 − 1 = 24"], "key": "24-24-5♣8♥A♥K♥"}
{"id": "test-24-0006", "level": "24", "target": 24, "cards": [{"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 12, "suit": "H", "label": "Q♥"}, {"rank": 9, "suit": "C", "label": "9♣"}], "solution": "9 + 12 + 13 - 10", "solution_steps": ["12 + 13 = 25", "25 − 10 = 15", "9 + 15 = 24"], "key": "24-24-10♥K♣Q♥9♣"}
{"id": "test-24-0007", "level": "24", "target": 24, "cards": [{"rank": 8, "suit": "C", "label": "8♣"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 10, "suit": "D", "label": "10♦"}], "solution": "6 + 9 * (10 - 8)", "solution_steps": ["10 − 8 = 2", "9 × 2 = 18", "6 + 18 = 24"], "key": "24-24-8♣9♥6♠10♦"}
{"id": "test-24-0008", "level": "24", "target": 24, "cards": [{"rank": 6, "suit": "H", "label": "6♥"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 10, "suit": "S", "label": "10♠"}, {"rank": 3, "suit": "C", "label": "3♣"}], "solution": "3 * (4 + 10 - 6)", "solution_steps": ["10 − 6 = 4", "4 + 4 = 8", "3 × 8 = 24"], "key": "24-24-6♥4♦10♠3♣"}
{"id": "test-24-0009", "level": "24", "target": 24, "cards": [{"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 7, "suit": "C", "label": "7♣"}, {"rank": 11, "suit": "H", "label": "J♥"}, {"rank": 4, "suit": "D", "label": "4♦"}], "solution": "2 + 4 + 7 + 11", "solution_steps": ["7 + 11 = 18", "4 + 18 = 22", "2 + 22 = 24"], "key": "24-24-2♠7♣J♥4♦"}
{"id": "test-24-0010", "level": "24", "target": 24, "cards": [{"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 13, "suit": "H", "label": "K♥"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 10, "suit": "D", "label": "10♦"}], "solution": "6 * 12 / (13 - 10)", "solution_steps": ["13 − 10 = 3", "12 ÷ 3 = 4", "6 × 4 = 24"], "key": "24-24-6♠K♥Q♦10♦"}
{"id": "test-24-0011", "level": "24", "target": 24, "cards": [{"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 2, "suit": "D", "label": "2♦"}, {"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 13, "suit": "C", "label": "K♣"}], "solution": "2 * (7 + 13 - 8)", "solution_steps": ["13 − 8 = 5", "7 + 5 = 12", "2 × 12 = 24"], "key": "24-24-8♠2♦7♦K♣"}
{"id": "test-24-0012", "level": "24", "target": 24, "cards": [{"rank": 13, "suit": "H", "label": "K♥"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 1, "suit": "D", "label": "A♦"}], "solution": "4 + 8 + 13 - 1", "solution_steps": ["8 + 13 = 21", "4 + 21 = 25", "25 − 1 = 24"], "key": "24-24-K♥8♦4♥A♦"}
{"id": "test-24-0013", "level": "24", "target": 24, "cards": [{"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 2, "suit": "S", "label": "2♠"}], "solution": "2 * (7 + 13 - 8)", "solution_steps": ["13 − 8 = 5", "7 + 5 = 12", "2 × 12 = 24"], "key": "24-24-7♦8♦K♣2♠"}
{"id": "test-24-0014", "level": "24", "target": 24, "cards": [{"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 9, "suit": "S", "label": "9♠"}, {"rank": 4, "suit": "S", "label": "4♠"}, {"rank": 7, "suit": "C", "label": "7♣"}], "solution": "11 * (7 - 4) - 9", "solution_steps": ["7 − 4 = 3", "11 × 3 = 33", "33 − 9 = 24"], "key": "24-24-J♣9♠4♠7♣"}
{"id": "test-24-0015", "level": "24", "target": 24, "cards": [{"rank": 7, "suit": "C", "label": "7♣"}, {"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 2, "suit": "D", "label": "2♦"}, {"rank": 5, "suit": "D", "label": "5♦"}], "solution": "1 * 2 * (5 + 7)", "solution_steps": ["5 + 7 = 12", "2 × 12 = 24", "1 × 24 = 24"], "key": "24-24-7♣A♣2♦5♦"}
{"id": "test-24-0016", "level": "24", "target": 24, "cards": [{"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 2, "suit": "H", "label": "2♥"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 2, "suit": "C", "label": "2♣"}], "solution": "2 * (5 + 8) - 2", "solution_steps": ["5 + 8 = 13", "2 × 13 = 26", "26 − 2 = 24"], "key": "24-24-5♦2♥8♠2♣"}
{"id": "test-24-0017", "level": "24", "target": 24, "cards": [{"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 13, "suit": "H", "label": "K♥"}, {"rank": 4, "suit": "C", "label": "4♣"}], "solution": "10 + 13 + 4 / 4", "solution_steps": ["4 ÷ 4 = 1", "13 + 1 = 14", "10 + 14 = 24"], "key": "24-24-4♥10♦K♥4♣"}
{"id": "test-24-0018", "level": "24", "target": 24, "cards": [{"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 7, "suit": "D", "label": "7♦"}], "solution": "3 + 7 * (13 - 10)", "solution_steps": ["13 − 10 = 3", "7 × 3 = 21", "3 + 21 = 24"], "key": "24-24-10♦K♣3♣7♦"}
{"id": "test-24-0019", "level": "24", "target": 24, "cards": [{"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 13, "suit": "H", "label": "K♥"}, {"rank": 2, "suit": "D", "label": "2♦"}, {"rank": 13, "suit": "S", "label": "K♠"}], "solution": "2 * (13 - 13 / 13)", "solution_steps": ["13 ÷ 13 = 1", "13 − 1 = 12", "2 × 12 = 24"], "key": "24-24-K♣K♥2♦K♠"}
{"id": "test-24-0020", "level": "24", "target": 24, "cards": [{"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 1, "suit": "S", "label": "A♠"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 10, "suit": "S", "label": "10♠"}], "solution": "3 * 10 - 5 - 1", "solution_steps": ["3 × 10 = 30", "30 − 5 = 25", "25 − 1 = 24"], "key": "24-24-5♥A♠3♠10♠"}
{"id": "test-24-0021", "level": "24", "target": 24, "cards": [{"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 11, "suit": "H", "label": "J♥"}], "solution": "6 * 8 / (13 - 11)", "solution_steps": ["13 − 11 = 2", "8 ÷ 2 = 4", "6 × 4 = 24"], "key": "24-24-K♣8♦6♦J♥"}
{"id": "test-24-0022", "level": "24", "target": 24, "cards": [{"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 13, "suit": "C", "label": "K♣"}], "solution": "11 + 13 * (7 - 6)", "solution_steps": ["7 − 6 = 1", "13 × 1 = 13", "11 + 13 = 24"], "key": "24-24-7♦J♣6♦K♣"}
{"id": "test-24-0023", "level": "24", "target": 24, "cards": [{"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 6, "suit": "H", "label": "6♥"}], "solution": "3 * (4 + 10 - 6)", "solution_steps": ["10 − 6 = 4", "4 + 4 = 8", "3 × 8 = 24"], "key": "24-24-10♦4♣3♠6♥"}
{"id": "test-24-0024", "level": "24", "target": 24, "cards": [{"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 3, "suit": "D", "label": "3♦"}, {"rank": 12, "suit": "S", "label": "Q♠"}, {"rank": 2, "suit": "D", "label": "2♦"}], "solution": "3 * (4 + 12) / 2", "solution_steps": ["4 + 12 = 16", "3 × 16 = 48", "48 ÷ 2 = 24"], "key": "24-24-4♥3♦Q♠2♦"}
{"id": "test-24-0025", "level": "24", "target": 24, "cards": [{"rank": 5, "suit": "S", "label": "5♠"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 6, "suit": "D", "label": "6♦"}], "solution": "3 * (5 + 5) - 6", "solution_steps": ["5 + 5 = 10", "3 × 10 = 30", "30 − 6 = 24"], "key": "24-24-5♠3♣5♥6♦"}
{"id": "test-24-0026", "level": "24", "target": 24, "cards": [{"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 13, "suit": "S", "label": "K♠"}, {"rank": 9, "suit": "C", "label": "9♣"}, {"rank": 1, "suit": "D", "label": "A♦"}], "solution": "(7 - 1) * (13 - 9)", "solution_steps": ["7 − 1 = 6", "13 − 9 = 4", "6 × 4 = 24"], "key": "24-24-7♠K♠9♣A♦"}
{"id": "test-24-0027", "level": "24", "target": 24, "cards": [{"rank": 3, "suit": "D", "label": "3♦"}, {"rank": 1, "suit": "S", "label": "A♠"}, {"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 12, "suit": "D", "label": "Q♦"}], "solution": "1 * 6 * 12 / 3", "solution_steps": ["6 × 12 = 72", "72 ÷ 3 = 24", "1 × 24 = 24"], "key": "24-24-3♦A♠6♠Q♦"}
{"id": "test-24-0028", "level": "24", "target": 24, "cards": [{"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 12, "suit": "C", "label": "Q♣"}, {"rank": 13, "suit": "S", "label": "K♠"}, {"rank": 3, "suit": "H", "label": "3♥"}], "solution": "1 + 3 * 12 - 13", "solution_steps": ["3 × 12 = 36", "36 − 13 = 23", "1 + 23 = 24"], "key": "24-24-A♣Q♣K♠3♥"}
{"id": "test-24-0029", "level": "24", "target": 24, "cards": [{"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 10, "suit": "C", "label": "10♣"}, {"rank": 9, "suit": "D", "label": "9♦"}], "solution": "3 * (1 + 10) - 9", "solution_steps": ["1 + 10 = 11", "3 × 11 = 33", "33 − 9 = 24"], "key": "24-24-A♣3♠10♣9♦"}
{"id": "test-24-0030", "level": "24", "target": 24, "cards": [{"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 10, "suit": "C", "label": "10♣"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 10, "suit": "H", "label": "10♥"}], "solution": "10 * (2 + 4 / 10)", "solution_steps": ["4 ÷ 10 = 2/5", "2 + 2/5 = 12/5", "10 × 12/5 = 24"], "key": "24-24-4♣10♣2♣10♥"}
{"id": "test-24-0031", "level": "24", "target": 24, "cards": [{"rank": 1, "suit": "S", "label": "A♠"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 12, "suit": "D", "label": "Q♦"}], "solution": "1 * (4 + 8 + 12)", "solution_steps": ["8 + 12 = 20", "4 + 20 = 24", "1 × 24 = 24"], "key": "24-24-A♠8♥4♣Q♦"}
{"id": "test-24-0032", "level": "24", "target": 24, "cards": [{"rank": 6, "suit": "C", "label": "6♣"}, {"rank": 8, "suit": "C", "label": "8♣"}, {"rank": 9, "suit": "S", "label": "9♠"}, {"rank": 9, "suit": "D", "label": "9♦"}], "solution": "8 * (9 + 9) / 6", "solution_steps": ["9 + 9 = 18", "8 × 18 = 144", "144 ÷ 6 = 24"], "key": "24-24-6♣8♣9♠9♦"}
{"id": "test-24-0033", "level": "24", "target": 24, "cards": [{"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 9, "suit": "S", "label": "9♠"}, {"rank": 13, "suit": "D", "label": "K♦"}], "solution": "12 * (5 + 13) / 9", "solution_steps": ["5 + 13 = 18", "12 × 18 = 216", "216 ÷ 9 = 24"], "key": "24-24-5♦Q♦9♠K♦"}
{"id": "test-24-0034", "level": "24", "target": 24, "cards": [{"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 11, "suit": "S", "label": "J♠"}], "solution": "4 * (1 + 11 - 6)", "solution_steps": ["11 − 6 = 5", "1 + 5 = 6", "4 × 6 = 24"], "key": "24-24-6♠A♦4♣J♠"}
{"id": "test-24-0035", "level": "24", "target": 24, "cards": [{"rank": 12, "suit": "C", "label": "Q♣"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 7, "suit": "D", "label": "7♦"}], "solution": "7 + 12 + 12 - 7", "solution_steps": ["12 + 12 = 24", "7 + 24 = 31", "31 − 7 = 24"], "key": "24-24-Q♣Q♦7♥7♦"}
{"id": "test-24-0036", "level": "24", "target": 24, "cards": [{"rank": 12, "suit": "H", "label": "Q♥"}, {"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 10, "suit": "S", "label": "10♠"}, {"rank": 8, "suit": "D", "label": "8♦"}], "solution": "12 * 10 / (13 - 8)", "solution_steps": ["13 − 8 = 5", "10 ÷ 5 = 2", "12 × 2 = 24"], "key": "24-24-Q♥K♣10♠8♦"}
{"id": "test-24-0037", "level": "24", "target": 24, "cards": [{"rank": 12, "suit": "H", "label": "Q♥"}, {"rank": 1, "suit": "S", "label": "A♠"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 5, "suit": "S", "label": "5♠"}], "solution": "1 * (5 + 7 + 12)", "solution_steps": ["7 + 12 = 19", "5 + 19 = 24", "1 × 24 = 24"], "key": "24-24-Q♥A♠7♠5♠"}
{"id": "test-24-0038", "level": "24", "target": 24, "cards": [{"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 8, "suit": "H", "label": "8♥"}], "solution": "8 * (2 * 5 - 7)", "solution_steps": ["2 × 5 = 10", "10 − 7 = 3", "8 × 3 = 24"], "key": "24-24-2♠7♦5♦8♥"}
{"id": "test-24-0039", "level": "24", "target": 24, "cards": [{"rank": 3, "suit": "D", "label": "3♦"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 6, "suit": "D", "label": "6♦"}], "solution": "6 * (3 + 8 / 8)", "solution_steps": ["8 ÷ 8 = 1", "3 + 1 = 4", "6 × 4 = 24"], "key": "24-24-3♦8♥8♠6♦"}
{"id": "test-24-0040", "level": "24", "target": 24, "cards": [{"rank": 11, "suit": "D", "label": "J♦"}, {"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 11, "suit": "S", "label": "J♠"}], "solution": "(1 + 11) * (13 - 11)", "solution_steps": ["1 + 11 = 12", "13 − 11 = 2", "12 × 2 = 24"], "key": "24-24-J♦A♣K♣J♠"}
{"id": "test-24-0041", "level": "24", "target": 24, "cards": [{"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 13, "suit": "D", "label": "K♦"}], "solution": "1 + 4 * 9 - 13", "solution_steps": ["4 × 9 = 36", "36 − 13 = 23", "1 + 23 = 24"], "key": "24-24-A♣9♥4♦K♦"}
{"id": "test-24-0042", "level": "24", "target": 24, "cards": [{"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 7, "suit": "C", "label": "7♣"}, {"rank": 5, "suit": "S", "label": "5♠"}, {"rank": 10, "suit": "D", "label": "10♦"}], "solution": "10 * (5 + 7) / 5", "solution_steps": ["5 + 7 = 12", "10 × 12 = 120", "120 ÷ 5 = 24"], "key": "24-24-5♣7♣5♠10♦"}
{"id": "test-24-0043", "level": "24", "target": 24, "cards": [{"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 13, "suit": "S", "label": "K♠"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 12, "suit": "S", "label": "Q♠"}], "solution": "3 * 13 - 12 - 3", "solution_steps": ["3 × 13 = 39", "39 − 12 = 27", "27 − 3 = 24"], "key": "24-24-3♠K♠3♣Q♠"}
{"id": "test-24-0044", "level": "24", "target": 24, "cards": [{"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 4, "suit": "S", "label": "4♠"}, {"rank": 3, "suit": "D", "label": "3♦"}], "solution": "3 * (3 + 9 - 4)", "solution_steps": ["9 − 4 = 5", "3 + 5 = 8", "3 × 8 = 24"], "key": "24-24-3♣9♦4♠3♦"}
{"id": "test-24-0045", "level": "24", "target": 24, "cards": [{"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 7, "suit": "C", "label": "7♣"}, {"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 2, "suit": "S", "label": "2♠"}], "solution": "5 + 5 + 2 * 7", "solution_steps": ["2 × 7 = 14", "5 + 14 = 19", "5 + 19 = 24"], "key": "24-24-5♦7♣5♣2♠"}
{"id": "test-24-0046", "level": "24", "target": 24, "cards": [{"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 12, "suit": "C", "label": "Q♣"}], "solution": "1 + 3 + 8 + 12", "solution_steps": ["8 + 12 = 20", "3 + 20 = 23", "1 + 23 = 24"], "key": "24-24-3♣8♦A♥Q♣"}
{"id": "test-24-0047", "level": "24", "target": 24, "cards": [{"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 2, "suit": "D", "label": "2♦"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 1, "suit": "D", "label": "A♦"}], "solution": "1 + 5 + 2 * 9", "solution_steps": ["2 × 9 = 18", "5 + 18 = 23", "1 + 23 = 24"], "key": "24-24-5♥2♦9♦A♦"}
{"id": "test-24-0048", "level": "24", "target": 24, "cards": [{"rank": 12, "suit": "H", "label": "Q♥"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 12, "suit": "S", "label": "Q♠"}, {"rank": 10, "suit": "H", "label": "10♥"}], "solution": "12 * 10 / (12 - 7)", "solution_steps": ["12 − 7 = 5", "10 ÷ 5 = 2", "12 × 2 = 24"], "key": "24-24-Q♥7♥Q♠10♥"}
{"id": "test-24-0049", "level": "24", "target": 24, "cards": [{"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 11, "suit": "C", "label": "J♣"}], "solution": "4 + 4 * (11 - 6)", "solution_steps": ["11 − 6 = 5", "4 × 5 = 20", "4 + 20 = 24"], "key": "24-24-4♥4♦6♦J♣"}
{"id": "test-three-digit-0000", "level": "three-digit", "target": 934, "cards": [{"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 12, "suit": "S", "label": "Q♠"}], "solution": "1 + 9 * (9 * 12 - 4) - 3", "solution_steps": ["9 × 12 = 108", "108 − 4 = 104", "9 × 104 = 936", "936 − 3 = 933", "1 + 933 = 934"], "key": "three-digit-934-3♣9♥A♦9♦4♣Q♠"}
{"id": "test-three-digit-0001", "level": "three-digit", "target": 127, "cards": [{"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 11, "suit": "D", "label": "J♦"}], "solution": "5 + 10 + 13 + 10 * 11 - 11", "solution_steps": ["10 × 11 = 110", "13 + 110 = 123", "123 − 11 = 112", "10 + 112 = 122", "5 + 122 = 127"], "key": "three-digit-127-10♥J♠K♣10♦5♣J♦"}
{"id": "test-three-digit-0002", "level": "three-digit", "target": 910, "cards": [{"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 7, "suit": "C", "label": "7♣"}, {"rank": 5, "suit": "H", "label": "5♥"}], "solution": "1 * 7 * (1 + 9) * (5 + 8)", "solution_steps": ["1 + 9 = 10", "5 + 8 = 13", "10 × 13 = 130", "7 × 130 = 910", "1 × 910 = 910"], "key": "three-digit-910-9♦A♥8♠A♣7♣5♥"}
{"id": "test-three-digit-0003", "level": "three-digit", "target": 669, "cards": [{"rank": 10, "suit": "C", "label": "10♣"}, {"rank": 11, "suit": "D", "label": "J♦"}, {"rank": 8, "suit": "C", "label": "8♣"}, {"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 12, "suit": "C", "label": "Q♣"}, {"rank": 6, "suit": "H", "label": "6♥"}], "solution": "1 + 8 + 10 * 11 * (12 - 6)", "solution_steps": ["12 − 6 = 6", "11 × 6 = 66", "10 × 66 = 660", "8 + 660 = 668", "1 + 668 = 669"], "key": "three-digit-669-10♣J♦8♣A♥Q♣6♥"}
{"id": "test-three-digit-0004", "level": "three-digit", "target": 676, "cards": [{"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 9, "suit": "S", "label": "9♠"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 4, "suit": "H", "label": "4♥"}], "solution": "4 + 4 * 7 * (5 + 9 + 10)", "solution_steps": ["9 + 10 = 19", "5 + 19 = 24", "7 × 24 = 168", "4 × 168 = 672", "4 + 672 = 676"], "key": "three-digit-676-5♥4♣10♦9♠7♠4♥"}
{"id": "test-three-digit-0005", "level": "three-digit", "target": 198, "cards": [{"rank": 2, "suit": "D", "label": "2♦"}, {"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 4, "suit": "S", "label": "4♠"}, {"rank": 10, "suit": "H", "label": "10♥"}], "solution": "2 + 4 + 5 + 11 * (7 + 10)", "solution_steps": ["7 + 10 = 17", "11 × 17 = 187", "5 + 187 = 192", "4 + 192 = 196", "2 + 196 = 198"], "key": "three-digit-198-2♦J♠7♠5♣4♠10♥"}
{"id": "test-three-digit-0006", "level": "three-digit", "target": 839, "cards": [{"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 12, "suit": "S", "label": "Q♠"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 7, "suit": "D", "label": "7♦"}], "solution": "13 + 7 * (12 * (3 + 7) - 2)", "solution_steps": ["3 + 7 = 10", "12 × 10 = 120", "120 − 2 = 118", "7 × 118 = 826", "13 + 826 = 839"], "key": "three-digit-839-K♣Q♠3♣2♣7♠7♦"}
{"id": "test-three-digit-0007", "level": "three-digit", "target": 421, "cards": [{"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 5, "suit": "S", "label": "5♠"}, {"rank": 6, "suit": "H", "label": "6♥"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 11, "suit": "S", "label": "J♠"}], "solution": "5 + (5 + 11) * (6 + 8 + 12)", "solution_steps": ["5 + 11 = 16", "8 + 12 = 20", "6 + 20 = 26", "16 × 26 = 416", "5 + 416 = 421"], "key": "three-digit-421-5♥Q♦5♠6♥8♥J♠"}
{"id": "test-three-digit-0008", "level": "three-digit", "target": 367, "cards": [{"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 5, "suit": "S", "label": "5♠"}, {"rank": 1, "suit": "S", "label": "A♠"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 10, "suit": "C", "label": "10♣"}], "solution": "4 * (5 - 1) * (10 + 13) - 1", "solution_steps": ["5 − 1 = 4", "10 + 13 = 23", "4 × 23 = 92", "4 × 92 = 368", "368 − 1 = 367"], "key": "three-digit-367-4♥5♠A♠A♦K♣10♣"}
{"id": "test-three-digit-0009", "level": "three-digit", "target": 115, "cards": [{"rank": 4, "suit": "S", "label": "4♠"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 8, "suit": "S", "label": "8♠"}], "solution": "2 + 4 + 8 * (7 + 7) - 3", "solution_steps": ["7 + 7 = 14", "8 × 14 = 112", "4 + 112 = 116", "116 − 3 = 113", "2 + 113 = 115"], "key": "three-digit-115-4♠7♠3♥2♠7♥8♠"}
{"id": "test-three-digit-0010", "level": "three-digit", "target": 196, "cards": [{"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 11, "suit": "D", "label": "J♦"}, {"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 4, "suit": "D", "label": "4♦"}], "solution": "4 + 8 * (10 + 10 * 11) / 5", "solution_steps": ["10 × 11 = 110", "10 + 110 = 120", "8 × 120 = 960", "960 ÷ 5 = 192", "4 + 192 = 196"], "key": "three-digit-196-5♣10♦J♦10♥8♥4♦"}
{"id": "test-three-digit-0011", "level": "three-digit", "target": 721, "cards": [{"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 7, "suit": "C", "label": "7♣"}, {"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 13, "suit": "H", "label": "K♥"}], "solution": "7 * (13 * (2 + 3 + 3) - 1)", "solution_steps": ["3 + 3 = 6", "2 + 6 = 8", "13 × 8 = 104", "104 − 1 = 103", "7 × 103 = 721"], "key": "three-digit-721-2♣3♣7♣A♣3♠K♥"}
{"id": "test-three-digit-0012", "level": "three-digit", "target": 423, "cards": [{"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 2, "suit": "D", "label": "2♦"}, {"rank": 5, "suit": "C", "label": "5♣"}], "solution": "4 * (2 + 13 * (13 - 5)) - 1", "solution_steps": ["13 − 5 = 8", "13 × 8 = 104", "2 + 104 = 106", "4 × 106 = 424", "424 − 1 = 423"], "key": "three-digit-423-K♦A♥K♣4♦2♦5♣"}
{"id": "test-three-digit-0013", "level": "three-digit", "target": 999, "cards": [{"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 11, "suit": "H", "label": "J♥"}, {"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 12, "suit": "C", "label": "Q♣"}, {"rank": 4, "suit": "H", "label": "4♥"}], "solution": "4 + 8 * (11 * 12 - 7) - 5", "solution_steps": ["11 × 12 = 132", "132 − 7 = 125", "8 × 125 = 1000", "1000 − 5 = 995", "4 + 995 = 999"], "key": "three-digit-999-8♠5♣J♥7♦Q♣4♥"}
{"id": "test-three-digit-0014", "level": "three-digit", "target": 498, "cards": [{"rank": 6, "suit": "H", "label": "6♥"}, {"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 4, "suit": "S", "label": "4♠"}, {"rank": 9, "suit": "C", "label": "9♣"}, {"rank": 7, "suit": "C", "label": "7♣"}, {"rank": 2, "suit": "D", "label": "2♦"}], "solution": "2 + 4 * (6 * 9 + 7 * 10)", "solution_steps": ["6 × 9 = 54", "7 × 10 = 70", "54 + 70 = 124", "4 × 124 = 496", "2 + 496 = 498"], "key": "three-digit-498-6♥10♥4♠9♣7♣2♦"}
{"id": "test-three-digit-0015", "level": "three-digit", "target": 999, "cards": [{"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 6, "suit": "H", "label": "6♥"}, {"rank": 6, "suit": "C", "label": "6♣"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 12, "suit": "C", "label": "Q♣"}, {"rank": 8, "suit": "C", "label": "8♣"}], "solution": "2 * 12 * (6 * 8 - 6) - 9", "solution_steps": ["6 × 8 = 48", "48 − 6 = 42", "12 × 42 = 504", "2 × 504 = 1008", "1008 − 9 = 999"], "key": "three-digit-999-2♠6♥6♣9♥Q♣8♣"}
{"id": "test-three-digit-0016", "level": "three-digit", "target": 887, "cards": [{"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 12, "suit": "D", "label": "Q♦"}], "solution": "8 * (8 + 12 + 7 * 13) - 1", "solution_steps": ["7 × 13 = 91", "12 + 91 = 103", "8 + 103 = 111", "8 × 111 = 888", "888 − 1 = 887"], "key": "three-digit-887-K♣8♠7♥A♦8♥Q♦"}
{"id": "test-three-digit-0017", "level": "three-digit", "target": 120, "cards": [{"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 13, "suit": "S", "label": "K♠"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 4, "suit": "S", "label": "4♠"}, {"rank": 8, "suit": "C", "label": "8♣"}], "solution": "4 + 8 + 9 * (9 + 13 - 10)", "solution_steps": ["13 − 10 = 3", "9 + 3 = 12", "9 × 12 = 108", "8 + 108 = 116", "4 + 116 = 120"], "key": "three-digit-120-9♦9♥K♠10♦4♠8♣"}
{"id": "test-three-digit-0018", "level": "three-digit", "target": 215, "cards": [{"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 9, "suit": "S", "label": "9♠"}], "solution": "1 + 9 * (3 * 11 - 8) - 11", "solution_steps": ["3 × 11 = 33", "33 − 8 = 25", "9 × 25 = 225", "225 − 11 = 214", "1 + 214 = 215"], "key": "three-digit-215-J♠A♣8♠J♣3♠9♠"}
{"id": "test-three-digit-0019", "level": "three-digit", "target": 635, "cards": [{"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 2, "suit": "S", "label": "2♠"}], "solution": "2 + 3 * (11 + 10 * (7 + 13))", "solution_steps": ["7 + 13 = 20", "10 × 20 = 200", "11 + 200 = 211", "3 × 211 = 633", "2 + 633 = 635"], "key": "three-digit-635-10♥K♦3♣J♣7♥2♠"}
{"id": "test-three-digit-0020", "level": "three-digit", "target": 534, "cards": [{"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 2, "suit": "H", "label": "2♥"}, {"rank": 9, "suit": "S", "label": "9♠"}], "solution": "2 + 4 * (1 + 11 * (3 + 9))", "solution_steps": ["3 + 9 = 12", "11 × 12 = 132", "1 + 132 = 133", "4 × 133 = 532", "2 + 532 = 534"], "key": "three-digit-534-3♥J♣A♦4♣2♥9♠"}
{"id": "test-three-digit-0021", "level": "three-digit", "target": 287, "cards": [{"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 7, "suit": "C", "label": "7♣"}, {"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 5, "suit": "C", "label": "5♣"}], "solution": "2 + 13 + 4 * (5 + 7 * 9)", "solution_steps": ["7 × 9 = 63", "5 + 63 = 68", "4 × 68 = 272", "13 + 272 = 285", "2 + 285 = 287"], "key": "three-digit-287-9♦2♠4♣7♣K♣5♣"}
{"id": "test-three-digit-0022", "level": "three-digit", "target": 668, "cards": [{"rank": 13, "suit": "H", "label": "K♥"}, {"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 10, "suit": "S", "label": "10♠"}, {"rank": 2, "suit": "H", "label": "2♥"}, {"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 9, "suit": "C", "label": "9♣"}], "solution": "10 * (2 + 13 * (9 - 4)) - 2", "solution_steps": ["9 − 4 = 5", "13 × 5 = 65", "2 + 65 = 67", "10 × 67 = 670", "670 − 2 = 668"], "key": "three-digit-668-K♥4♥10♠2♥2♠9♣"}
{"id": "test-three-digit-0023", "level": "three-digit", "target": 383, "cards": [{"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 9, "suit": "S", "label": "9♠"}], "solution": "1 * (8 * (4 + 5 * 9) - 9)", "solution_steps": ["5 × 9 = 45", "4 + 45 = 49", "8 × 49 = 392", "392 − 9 = 383", "1 × 383 = 383"], "key": "three-digit-383-9♦5♦A♦4♥8♥9♠"}
{"id": "test-three-digit-0024", "level": "three-digit", "target": 741, "cards": [{"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 12, "suit": "S", "label": "Q♠"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 3, "suit": "C", "label": "3♣"}], "solution": "3 + 3 * (6 + 10 * (12 + 12))", "solution_steps": ["12 + 12 = 24", "10 × 24 = 240", "6 + 240 = 246", "3 × 246 = 738", "3 + 738 = 741"], "key": "three-digit-741-Q♦6♠Q♠10♦3♠3♣"}
{"id": "test-three-digit-0025", "level": "three-digit", "target": 986, "cards": [{"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 8, "suit": "H", "label": "8♥"}], "solution": "2 + 8 * (4 + 7 * (8 + 9))", "solution_steps": ["8 + 9 = 17", "7 × 17 = 119", "4 + 119 = 123", "8 × 123 = 984", "2 + 984 = 986"], "key": "three-digit-986-7♦4♥9♥2♣8♦8♥"}
{"id": "test-three-digit-0026", "level": "three-digit", "target": 157, "cards": [{"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 1, "suit": "S", "label": "A♠"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 4, "suit": "S", "label": "4♠"}], "solution": "1 + 3 * 4 * (5 + 2 * 4)", "solution_steps": ["2 × 4 = 8", "5 + 8 = 13", "4 × 13 = 52", "3 × 52 = 156", "1 + 156 = 157"], "key": "three-digit-157-4♣A♠2♣3♥5♦4♠"}
{"id": "test-three-digit-0027", "level": "three-digit", "target": 327, "cards": [{"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 10, "suit": "S", "label": "10♠"}, {"rank": 9, "suit": "C", "label": "9♣"}, {"rank": 13, "suit": "H", "label": "K♥"}, {"rank": 7, "suit": "C", "label": "7♣"}], "solution": "5 + 7 * (9 - 7) * (10 + 13)", "solution_steps": ["9 − 7 = 2", "10 + 13 = 23", "2 × 23 = 46", "7 × 46 = 322", "5 + 322 = 327"], "key": "three-digit-327-5♣7♦10♠9♣K♥7♣"}
{"id": "test-three-digit-0028", "level": "three-digit", "target": 468, "cards": [{"rank": 12, "suit": "C", "label": "Q♣"}, {"rank": 2, "suit": "H", "label": "2♥"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 13, "suit": "S", "label": "K♠"}], "solution": "(9 + 10) * (12 + 13) - 5 - 2", "solution_steps": ["9 + 10 = 19", "12 + 13 = 25", "19 × 25 = 475", "475 − 5 = 470", "470 − 2 = 468"], "key": "three-digit-468-Q♣2♥10♦5♥9♥K♠"}
{"id": "test-three-digit-0029", "level": "three-digit", "target": 483, "cards": [{"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 12, "suit": "C", "label": "Q♣"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 5, "suit": "D", "label": "5♦"}], "solution": "10 + 4 * 10 * 12 - 5 - 2", "solution_steps": ["10 × 12 = 120", "4 × 120 = 480", "10 + 480 = 490", "490 − 5 = 485", "485 − 2 = 483"], "key": "three-digit-483-10♥4♦2♣Q♣10♦5♦"}
{"id": "test-three-digit-0030", "level": "three-digit", "target": 907, "cards": [{"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 13, "suit": "S", "label": "K♠"}, {"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 2, "suit": "C", "label": "2♣"}], "solution": "2 + 12 * (11 + 5 * 13) - 7", "solution_steps": ["5 × 13 = 65", "11 + 65 = 76", "12 × 76 = 912", "912 − 7 = 905", "2 + 905 = 907"], "key": "three-digit-907-5♣Q♦7♥K♠J♠2♣"}
{"id": "test-three-digit-0031", "level": "three-digit", "target": 520, "cards": [{"rank": 10, "suit": "S", "label": "10♠"}, {"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 1, "suit": "S", "label": "A♠"}, {"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 6, "suit": "C", "label": "6♣"}], "solution": "1 * 10 * (10 + 6 * 8 - 6)", "solution_steps": ["6 × 8 = 48", "10 + 48 = 58", "58 − 6 = 52", "10 × 52 = 520", "1 × 520 = 520"], "key": "three-digit-520-10♠6♦A♠10♥8♦6♣"}
{"id": "test-three-digit-0032", "level": "three-digit", "target": 518, "cards": [{"rank": 12, "suit": "C", "label": "Q♣"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 12, "suit": "S", "label": "Q♠"}, {"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 7, "suit": "H", "label": "7♥"}], "solution": "2 + 12 * (7 + 12 * (6 - 3))", "solution_steps": ["6 − 3 = 3", "12 × 3 = 36", "7 + 36 = 43", "12 × 43 = 516", "2 + 516 = 518"], "key": "three-digit-518-Q♣3♠2♣Q♠6♠7♥"}
{"id": "test-three-digit-0033", "level": "three-digit", "target": 481, "cards": [{"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 8, "suit": "C", "label": "8♣"}, {"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 9, "suit": "S", "label": "9♠"}, {"rank": 7, "suit": "C", "label": "7♣"}, {"rank": 7, "suit": "S", "label": "7♠"}], "solution": "9 + 4 * (9 * (7 + 7) - 8)", "solution_steps": ["7 + 7 = 14", "9 × 14 = 126", "126 − 8 = 118", "4 × 118 = 472", "9 + 472 = 481"], "key": "three-digit-481-9♦8♣4♥9♠7♣7♠"}
{"id": "test-three-digit-0034", "level": "three-digit", "target": 118, "cards": [{"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 6, "suit": "C", "label": "6♣"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 11, "suit": "D", "label": "J♦"}], "solution": "1 + 9 + (12 - 6) * (7 + 11)", "solution_steps": ["12 − 6 = 6", "7 + 11 = 18", "6 × 18 = 108", "9 + 108 = 117", "1 + 117 = 118"], "key": "three-digit-118-9♦A♥6♣Q♦7♥J♦"}
{"id": "test-three-digit-0035", "level": "three-digit", "target": 145, "cards": [{"rank": 13, "suit": "H", "label": "K♥"}, {"rank": 12, "suit": "H", "label": "Q♥"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 4, "suit": "C", "label": "4♣"}], "solution": "4 + 12 * (8 + 13 - 9) - 3", "solution_steps": ["13 − 9 = 4", "8 + 4 = 12", "12 × 12 = 144", "4 + 144 = 148", "148 − 3 = 145"], "key": "three-digit-145-K♥Q♥9♦8♦3♣4♣"}
{"id": "test-three-digit-0036", "level": "three-digit", "target": 261, "cards": [{"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 10, "suit": "S", "label": "10♠"}, {"rank": 8, "suit": "C", "label": "8♣"}, {"rank": 12, "suit": "H", "label": "Q♥"}], "solution": "12 + (7 + 8) * (7 + 10) - 6", "solution_steps": ["7 + 8 = 15", "7 + 10 = 17", "15 × 17 = 255", "12 + 255 = 267", "267 − 6 = 261"], "key": "three-digit-261-7♦7♠6♠10♠8♣Q♥"}
{"id": "test-three-digit-0037", "level": "three-digit", "target": 441, "cards": [{"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 9, "suit": "C", "label": "9♣"}, {"rank": 12, "suit": "D", "label": "Q♦"}], "solution": "4 * (10 + 9 * 12 - 7) - 3", "solution_steps": ["9 × 12 = 108", "10 + 108 = 118", "118 − 7 = 111", "4 × 111 = 444", "444 − 3 = 441"], "key": "three-digit-441-10♦4♥7♥3♠9♣Q♦"}
{"id": "test-three-digit-0038", "level": "three-digit", "target": 778, "cards": [{"rank": 12, "suit": "C", "label": "Q♣"}, {"rank": 13, "suit": "S", "label": "K♠"}, {"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 6, "suit": "H", "label": "6♥"}, {"rank": 10, "suit": "C", "label": "10♣"}, {"rank": 9, "suit": "D", "label": "9♦"}], "solution": "9 + 6 * 11 * 12 - 13 - 10", "solution_steps": ["11 × 12 = 132", "6 × 132 = 792", "792 − 13 = 779", "779 − 10 = 769", "9 + 769 = 778"], "key": "three-digit-778-Q♣K♠J♠6♥10♣9♦"}
{"id": "test-three-digit-0039", "level": "three-digit", "target": 392, "cards": [{"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 9, "suit": "S", "label": "9♠"}, {"rank": 12, "suit": "H", "label": "Q♥"}, {"rank": 13, "suit": "S", "label": "K♠"}, {"rank": 9, "suit": "C", "label": "9♣"}, {"rank": 2, "suit": "C", "label": "2♣"}], "solution": "2 + 10 * (12 * (13 - 9) - 9)", "solution_steps": ["13 − 9 = 4", "12 × 4 = 48", "48 − 9 = 39", "10 × 39 = 390", "2 + 390 = 392"], "key": "three-digit-392-10♥9♠Q♥K♠9♣2♣"}
{"id": "test-three-digit-0040", "level": "three-digit", "target": 109, "cards": [{"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 2, "suit": "D", "label": "2♦"}, {"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 9, "suit": "D", "label": "9♦"}], "solution": "2 + (10 - 5) * (9 + 13) - 3", "solution_steps": ["10 − 5 = 5", "9 + 13 = 22", "5 × 22 = 110", "110 − 3 = 107", "2 + 107 = 109"], "key": "three-digit-109-K♦3♣5♦2♦10♥9♦"}
{"id": "test-three-digit-0041", "level": "three-digit", "target": 274, "cards": [{"rank": 8, "suit": "C", "label": "8♣"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 12, "suit": "S", "label": "Q♠"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 9, "suit": "D", "label": "9♦"}], "solution": "(8 * 8 * 9 - 12) / 2 - 8", "solution_steps": ["8 × 9 = 72", "8 × 72 = 576", "576 − 12 = 564", "564 ÷ 2 = 282", "282 − 8 = 274"], "key": "three-digit-274-8♣8♦2♠Q♠8♥9♦"}
{"id": "test-three-digit-0042", "level": "three-digit", "target": 248, "cards": [{"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 7, "suit": "C", "label": "7♣"}], "solution": "2 + 4 + 11 * (7 + 7 + 8)", "solution_steps": ["7 + 8 = 15", "7 + 15 = 22", "11 × 22 = 242", "4 + 242 = 246", "2 + 246 = 248"], "key": "three-digit-248-J♠2♠8♠7♦4♣7♣"}
{"id": "test-three-digit-0043", "level": "three-digit", "target": 758, "cards": [{"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 1, "suit": "S", "label": "A♠"}, {"rank": 11, "suit": "H", "label": "J♥"}, {"rank": 5, "suit": "S", "label": "5♠"}, {"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 7, "suit": "H", "label": "7♥"}], "solution": "1 + 5 * 7 * (11 + 11) - 13", "solution_steps": ["11 + 11 = 22", "7 × 22 = 154", "5 × 154 = 770", "770 − 13 = 757", "1 + 757 = 758"], "key": "three-digit-758-J♣A♠J♥5♠K♣7♥"}
{"id": "test-three-digit-0044", "level": "three-digit", "target": 321, "cards": [{"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 10, "suit": "S", "label": "10♠"}, {"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 9, "suit": "S", "label": "9♠"}], "solution": "1 + 9 * (10 + 3 * 9) - 13", "solution_steps": ["3 × 9 = 27", "10 + 27 = 37", "9 × 37 = 333", "333 − 13 = 320", "1 + 320 = 321"], "key": "three-digit-321-9♦10♠K♦A♣3♥9♠"}
{"id": "test-three-digit-0045", "level": "three-digit", "target": 208, "cards": [{"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 8, "suit": "C", "label": "8♣"}, {"rank": 5, "suit": "S", "label": "5♠"}, {"rank": 12, "suit": "H", "label": "Q♥"}], "solution": "(8 + 8) * (6 * 12 - 7) / 5", "solution_steps": ["8 + 8 = 16", "6 × 12 = 72", "72 − 7 = 65", "16 × 65 = 1040", "1040 ÷ 5 = 208"], "key": "three-digit-208-8♥6♦7♠8♣5♠Q♥"}
{"id": "test-three-digit-0046", "level": "three-digit", "target": 368, "cards": [{"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 5, "suit": "D", "label": "5♦"}], "solution": "1 + 7 + 3 * 8 * (5 + 10)", "solution_steps": ["5 + 10 = 15", "8 × 15 = 120", "3 × 120 = 360", "7 + 360 = 367", "1 + 367 = 368"], "key": "three-digit-368-A♣7♥3♣8♠10♥5♦"}
{"id": "test-three-digit-0047", "level": "three-digit", "target": 610, "cards": [{"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 5, "suit": "C", "label": "5♣"}], "solution": "5 * (8 + 10 + 8 * (3 + 10))", "solution_steps": ["3 + 10 = 13", "8 × 13 = 104", "10 + 104 = 114", "8 + 114 = 122", "5 × 122 = 610"], "key": "three-digit-610-8♠10♦8♦3♥10♥5♣"}
{"id": "test-three-digit-0048", "level": "three-digit", "target": 934, "cards": [{"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 5, "suit": "S", "label": "5♠"}, {"rank": 10, "suit": "C", "label": "10♣"}], "solution": "4 + (5 + 10) * (6 * 12 - 10)", "solution_steps": ["5 + 10 = 15", "6 × 12 = 72", "72 − 10 = 62", "15 × 62 = 930", "4 + 930 = 934"], "key": "three-digit-934-4♦Q♦10♥6♠5♠10♣"}
{"id": "test-three-digit-0049", "level": "three-digit", "target": 927, "cards": [{"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 2, "suit": "H", "label": "2♥"}], "solution": "(11 - 2) * (7 + 4 * 4 * 6)", "solution_steps": ["11 − 2 = 9", "4 × 6 = 24", "4 × 24 = 96", "7 + 96 = 103", "9 × 103 = 927"], "key": "three-digit-927-6♦J♣7♥4♥4♣2♥"}
{"id": "test-year-0000", "level": "year", "target": 1943, "cards": [{"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 2, "suit": "D", "label": "2♦"}, {"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 6, "suit": "D", "label": "6♦"}], "solution": "2 + 4 + 9 * (6 + 10 * (8 + 13)) - 7", "solution_steps": ["8 + 13 = 21", "10 × 21 = 210", "6 + 210 = 216", "9 × 216 = 1944", "1944 − 7 = 1937", "4 + 1937 = 1941", "2 + 1941 = 1943"], "key": "year-1943-8♥2♦7♦10♦9♥K♣4♣6♦"}
{"id": "test-year-0001", "level": "year", "target": 2003, "cards": [{"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 12, "suit": "S", "label": "Q♠"}, {"rank": 13, "suit": "S", "label": "K♠"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 2, "suit": "H", "label": "2♥"}, {"rank": 6, "suit": "C", "label": "6♣"}, {"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 7, "suit": "C", "label": "7♣"}], "solution": "2 + (10 + 13) * (12 + 6 * 7 * 8) / 4", "solution_steps": ["10 + 13 = 23", "7 × 8 = 56", "6 × 56 = 336", "12 + 336 = 348", "23 × 348 = 8004", "8004 ÷ 4 = 2001", "2 + 2001 = 2003"], "key": "year-2003-8♥Q♠K♠4♦2♥6♣10♥7♣"}
{"id": "test-year-0002", "level": "year", "target": 2004, "cards": [{"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 12, "suit": "H", "label": "Q♥"}, {"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 10, "suit": "S", "label": "10♠"}, {"rank": 3, "suit": "D", "label": "3♦"}, {"rank": 11, "suit": "D", "label": "J♦"}, {"rank": 4, "suit": "C", "label": "4♣"}], "solution": "1 + 3 + 10 * (12 + 13) * (11 - 12 / 4)", "solution_steps": ["12 + 13 = 25", "12 ÷ 4 = 3", "11 − 3 = 8", "25 × 8 = 200", "10 × 200 = 2000", "3 + 2000 = 2003", "1 + 2003 = 2004"], "key": "year-2004-K♣Q♦Q♥A♥10♠3♦J♦4♣"}
{"id": "test-year-0003", "level": "year", "target": 2088, "cards": [{"rank": 9, "suit": "S", "label": "9♠"}, {"rank": 2, "suit": "D", "label": "2♦"}, {"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 3, "suit": "D", "label": "3♦"}], "solution": "2 + 9 + 8 * (5 + 8) * (9 + 11) - 3", "solution_steps": ["5 + 8 = 13", "9 + 11 = 20", "13 × 20 = 260", "8 × 260 = 2080", "9 + 2080 = 2089", "2089 − 3 = 2086", "2 + 2086 = 2088"], "key": "year-2088-9♠2♦5♥9♥8♠8♥J♣3♦"}
{"id": "test-year-0004", "level": "year", "target": 1967, "cards": [{"rank": 10, "suit": "S", "label": "10♠"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 2, "suit": "H", "label": "2♥"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 10, "suit": "D", "label": "10♦"}], "solution": "2 + 2 + 13 * (9 / 9 + 10 * (5 + 10))", "solution_steps": ["9 ÷ 9 = 1", "5 + 10 = 15", "10 × 15 = 150", "1 + 150 = 151", "13 × 151 = 1963", "2 + 1963 = 1965", "2 + 1965 = 1967"], "key": "year-1967-10♠9♦2♣5♥2♥9♥K♣10♦"}
{"id": "test-year-0005", "level": "year", "target": 2097, "cards": [{"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 6, "suit": "H", "label": "6♥"}, {"rank": 11, "suit": "D", "label": "J♦"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 13, "suit": "H", "label": "K♥"}, {"rank": 7, "suit": "C", "label": "7♣"}], "solution": "2 + 5 + 11 * (8 + 7 * 13 * (6 - 4))", "solution_steps": ["6 − 4 = 2", "13 × 2 = 26", "7 × 26 = 182", "8 + 182 = 190", "11 × 190 = 2090", "5 + 2090 = 2095", "2 + 2095 = 2097"], "key": "year-2097-8♠5♥6♥J♦4♦2♣K♥7♣"}
{"id": "test-year-0006", "level": "year", "target": 1905, "cards": [{"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 7, "suit": "C", "label": "7♣"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 10, "suit": "C", "label": "10♣"}], "solution": "1 + 5 + 9 * (7 / 7 + 10 * (10 + 11))", "solution_steps": ["7 ÷ 7 = 1", "10 + 11 = 21", "10 × 21 = 210", "1 + 210 = 211", "9 × 211 = 1899", "5 + 1899 = 1904", "1 + 1904 = 1905"], "key": "year-1905-10♦7♣9♥5♣A♦J♣7♠10♣"}
{"id": "test-year-0007", "level": "year", "target": 2096, "cards": [{"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 2, "suit": "D", "label": "2♦"}], "solution": "1 + 5 + (2 + 9) * (4 * 6 * 8 - 2)", "solution_steps": ["2 + 9 = 11", "6 × 8 = 48", "4 × 48 = 192", "192 − 2 = 190", "11 × 190 = 2090", "5 + 2090 = 2095", "1 + 2095 = 2096"], "key": "year-2096-6♦5♣2♣4♣9♦8♦A♥2♦"}
{"id": "test-year-0008", "level": "year", "target": 1990, "cards": [{"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 4, "suit": "S", "label": "4♠"}, {"rank": 13, "suit": "H", "label": "K♥"}, {"rank": 8, "suit": "C", "label": "8♣"}, {"rank": 12, "suit": "S", "label": "Q♠"}, {"rank": 1, "suit": "S", "label": "A♠"}, {"rank": 5, "suit": "H", "label": "5♥"}], "solution": "1 + 8 * (5 * 9 + 12 * (4 + 13)) - 3", "solution_steps": ["5 × 9 = 45", "4 + 13 = 17", "12 × 17 = 204", "45 + 204 = 249", "8 × 249 = 1992", "1992 − 3 = 1989", "1 + 1989 = 1990"], "key": "year-1990-3♣9♥4♠K♥8♣Q♠A♠5♥"}
{"id": "test-year-0009", "level": "year", "target": 2043, "cards": [{"rank": 6, "suit": "C", "label": "6♣"}, {"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 9, "suit": "S", "label": "9♠"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 1, "suit": "D", "label": "A♦"}], "solution": "1 + 3 * (9 + 6 * (4 + 9 * 12)) - 1", "solution_steps": ["9 × 12 = 108", "4 + 108 = 112", "6 × 112 = 672", "9 + 672 = 681", "3 × 681 = 2043", "2043 − 1 = 2042", "1 + 2042 = 2043"], "key": "year-2043-6♣4♥9♠9♥Q♦3♣A♣A♦"}
{"id": "test-year-0010", "level": "year", "target": 2099, "cards": [{"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 12, "suit": "C", "label": "Q♣"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 1, "suit": "S", "label": "A♠"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 2, "suit": "H", "label": "2♥"}, {"rank": 2, "suit": "C", "label": "2♣"}], "solution": "1 + 2 + 2 * (9 * 13 * (12 - 3) - 5)", "solution_steps": ["12 − 3 = 9", "13 × 9 = 117", "9 × 117 = 1053", "1053 − 5 = 1048", "2 × 1048 = 2096", "2 + 2096 = 2098", "1 + 2098 = 2099"], "key": "year-2099-K♣5♦Q♣9♥A♠3♠2♥2♣"}
{"id": "test-year-0011", "level": "year", "target": 1930, "cards": [{"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 12, "suit": "C", "label": "Q♣"}], "solution": "1 + 4 + 7 + 4 * 5 * 8 * 12 - 2", "solution_steps": ["8 × 12 = 96", "5 × 96 = 480", "4 × 480 = 1920", "7 + 1920 = 1927", "4 + 1927 = 1931", "1931 − 2 = 1929", "1 + 1929 = 1930"], "key": "year-1930-4♣5♥8♥2♠A♥4♦7♦Q♣"}
{"id": "test-year-0012", "level": "year", "target": 2059, "cards": [{"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 11, "suit": "H", "label": "J♥"}, {"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 6, "suit": "C", "label": "6♣"}, {"rank": 13, "suit": "S", "label": "K♠"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 1, "suit": "S", "label": "A♠"}], "solution": "1 + 10 * (6 + 11 * (6 + 13) - 9) - 2", "solution_steps": ["6 + 13 = 19", "11 × 19 = 209", "209 − 9 = 200", "6 + 200 = 206", "10 × 206 = 2060", "2060 − 2 = 2058", "1 + 2058 = 2059"], "key": "year-2059-2♣J♥6♠10♦6♣K♠9♦A♠"}
{"id": "test-year-0013", "level": "year", "target": 1924, "cards": [{"rank": 10, "suit": "S", "label": "10♠"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 2, "suit": "H", "label": "2♥"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 11, "suit": "S", "label": "J♠"}], "solution": "1 + 2 + 11 * (5 * 9 + 10 * 13) - 4", "solution_steps": ["5 × 9 = 45", "10 × 13 = 130", "45 + 130 = 175", "11 × 175 = 1925", "1925 − 4 = 1921", "2 + 1921 = 1923", "1 + 1923 = 1924"], "key": "year-1924-10♠9♥2♥4♦A♥K♦5♣J♠"}
{"id": "test-year-0014", "level": "year", "target": 2080, "cards": [{"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 11, "suit": "D", "label": "J♦"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 7, "suit": "C", "label": "7♣"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 12, "suit": "D", "label": "Q♦"}], "solution": "1 + (7 + 8) * (5 * 11 + 7 * 12) - 6", "solution_steps": ["7 + 8 = 15", "5 × 11 = 55", "7 × 12 = 84", "55 + 84 = 139", "15 × 139 = 2085", "2085 − 6 = 2079", "1 + 2079 = 2080"], "key": "year-2080-7♥6♠J♦A♦7♣8♦5♣Q♦"}
{"id": "test-year-0015", "level": "year", "target": 2043, "cards": [{"rank": 9, "suit": "S", "label": "9♠"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 12, "suit": "S", "label": "Q♠"}, {"rank": 10, "suit": "D", "label": "10♦"}], "solution": "1 + 2 + 3 * 5 * (7 + 9 + 10 * 12)", "solution_steps": ["10 × 12 = 120", "9 + 120 = 129", "7 + 129 = 136", "5 × 136 = 680", "3 × 680 = 2040", "2 + 2040 = 2042", "1 + 2042 = 2043"], "key": "year-2043-9♠7♠2♠5♥A♦3♠Q♠10♦"}
{"id": "test-year-0016", "level": "year", "target": 2087, "cards": [{"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 2, "suit": "H", "label": "2♥"}, {"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 10, "suit": "C", "label": "10♣"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 8, "suit": "C", "label": "8♣"}, {"rank": 10, "suit": "H", "label": "10♥"}], "solution": "2 + 5 + 8 * (9 * 10 * (7 - 4) - 10)", "solution_steps": ["7 − 4 = 3", "10 × 3 = 30", "9 × 30 = 270", "270 − 10 = 260", "8 × 260 = 2080", "5 + 2080 = 2085", "2 + 2085 = 2087"], "key": "year-2087-7♦2♥5♦4♣10♣9♥8♣10♥"}
{"id": "test-year-0017", "level": "year", "target": 1981, "cards": [{"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 3, "suit": "C", "label": "3♣"}], "solution": "3 + 13 * (4 + 5) * (6 + 11) - 8 - 3", "solution_steps": ["4 + 5 = 9", "6 + 11 = 17", "9 × 17 = 153", "13 × 153 = 1989", "1989 − 8 = 1981", "1981 − 3 = 1978", "3 + 1978 = 1981"], "key": "year-1981-K♦5♦4♥6♦8♥J♣3♠3♣"}
{"id": "test-year-0018", "level": "year", "target": 2025, "cards": [{"rank": 9, "suit": "S", "label": "9♠"}, {"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 11, "suit": "H", "label": "J♥"}, {"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 13, "suit": "S", "label": "K♠"}, {"rank": 10, "suit": "C", "label": "10♣"}], "solution": "2 + 4 + 4 + 13 * (5 * 9 + 10 * 11)", "solution_steps": ["5 × 9 = 45", "10 × 11 = 110", "45 + 110 = 155", "13 × 155 = 2015", "4 + 2015 = 2019", "4 + 2019 = 2023", "2 + 2023 = 2025"], "key": "year-2025-9♠2♠5♦J♥4♥4♦K♠10♣"}
{"id": "test-year-0019", "level": "year", "target": 1970, "cards": [{"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 8, "suit": "C", "label": "8♣"}, {"rank": 13, "suit": "H", "label": "K♥"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 4, "suit": "S", "label": "4♠"}, {"rank": 1, "suit": "D", "label": "A♦"}], "solution": "1 + 1 + 4 * 12 * (8 * (13 - 7) - 7)", "solution_steps": ["13 − 7 = 6", "8 × 6 = 48", "48 − 7 = 41", "12 × 41 = 492", "4 × 492 = 1968", "1 + 1968 = 1969", "1 + 1969 = 1970"], "key": "year-1970-7♦8♣K♥7♥A♥Q♦4♠A♦"}
{"id": "test-year-0020", "level": "year", "target": 1916, "cards": [{"rank": 8, "suit": "C", "label": "8♣"}, {"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 7, "suit": "H", "label": "7♥"}], "solution": "3 + 5 + 4 * (13 + 8 * (9 + 7 * 7))", "solution_steps": ["7 × 7 = 49", "9 + 49 = 58", "8 × 58 = 464", "13 + 464 = 477", "4 × 477 = 1908", "5 + 1908 = 1913", "3 + 1913 = 1916"], "key": "year-1916-8♣K♣3♣4♣7♦5♣9♦7♥"}
{"id": "test-year-0021", "level": "year", "target": 2023, "cards": [{"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 8, "suit": "C", "label": "8♣"}], "solution": "1 + 6 + 6 * 7 * (8 + 8 * (13 - 8))", "solution_steps": ["13 − 8 = 5", "8 × 5 = 40", "8 + 40 = 48", "7 × 48 = 336", "6 × 336 = 2016", "6 + 2016 = 2022", "1 + 2022 = 2023"], "key": "year-2023-A♣6♠7♦8♦K♦8♥6♦8♣"}
{"id": "test-year-0022", "level": "year", "target": 2069, "cards": [{"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 11, "suit": "H", "label": "J♥"}, {"rank": 12, "suit": "S", "label": "Q♠"}, {"rank": 5, "suit": "S", "label": "5♠"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 8, "suit": "D", "label": "8♦"}], "solution": "4 + 5 + 11 * (10 * (9 + 11) - 12) - 8", "solution_steps": ["9 + 11 = 20", "10 × 20 = 200", "200 − 12 = 188", "11 × 188 = 2068", "2068 − 8 = 2060", "5 + 2060 = 2065", "4 + 2065 = 2069"], "key": "year-2069-9♥J♥Q♠5♠10♦J♣4♥8♦"}
{"id": "test-year-0023", "level": "year", "target": 2033, "cards": [{"rank": 12, "suit": "H", "label": "Q♥"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 3, "suit": "H", "label": "3♥"}], "solution": "1 + 2 * 2 * 4 * (7 + 12 * (13 - 3))", "solution_steps": ["13 − 3 = 10", "12 × 10 = 120", "7 + 120 = 127", "4 × 127 = 508", "2 × 508 = 1016", "2 × 1016 = 2032", "1 + 2032 = 2033"], "key": "year-2033-Q♥2♣7♠K♦A♥2♠4♦3♥"}
{"id": "test-year-0024", "level": "year", "target": 1953, "cards": [{"rank": 2, "suit": "D", "label": "2♦"}, {"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 9, "suit": "S", "label": "9♠"}, {"rank": 12, "suit": "C", "label": "Q♣"}, {"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 6, "suit": "D", "label": "6♦"}], "solution": "1 + 2 + 5 * (9 * (7 * 8 - 12) - 6)", "solution_steps": ["7 × 8 = 56", "56 − 12 = 44", "9 × 44 = 396", "396 − 6 = 390", "5 × 390 = 1950", "2 + 1950 = 1952", "1 + 1952 = 1953"], "key": "year-1953-2♦7♦8♦9♠Q♣A♥5♥6♦"}
{"id": "test-year-0025", "level": "year", "target": 1934, "cards": [{"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 11, "suit": "H", "label": "J♥"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 13, "suit": "H", "label": "K♥"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 1, "suit": "C", "label": "A♣"}], "solution": "1 + 3 + 5 + 11 * (8 * (10 + 13) - 9)", "solution_steps": ["10 + 13 = 23", "8 × 23 = 184", "184 − 9 = 175", "11 × 175 = 1925", "5 + 1925 = 1930", "3 + 1930 = 1933", "1 + 1933 = 1934"], "key": "year-1934-10♦5♣8♥J♥3♣K♥9♦A♣"}
{"id": "test-year-0026", "level": "year", "target": 2085, "cards": [{"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 13, "suit": "S", "label": "K♠"}, {"rank": 10, "suit": "S", "label": "10♠"}, {"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 7, "suit": "C", "label": "7♣"}, {"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 8, "suit": "C", "label": "8♣"}], "solution": "7 + 8 + 11 * (10 + 10 + 13 * 13) - 9", "solution_steps": ["13 × 13 = 169", "10 + 169 = 179", "10 + 179 = 189", "11 × 189 = 2079", "2079 − 9 = 2070", "8 + 2070 = 2078", "7 + 2078 = 2085"], "key": "year-2085-9♦K♠10♠K♦10♦7♣J♣8♣"}
{"id": "test-year-0027", "level": "year", "target": 1933, "cards": [{"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 11, "suit": "D", "label": "J♦"}, {"rank": 4, "suit": "S", "label": "4♠"}, {"rank": 12, "suit": "C", "label": "Q♣"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 7, "suit": "H", "label": "7♥"}], "solution": "3 + 4 + 5 + 7 * 11 * (12 + 13) - 4", "solution_steps": ["12 + 13 = 25", "11 × 25 = 275", "7 × 275 = 1925", "5 + 1925 = 1930", "1930 − 4 = 1926", "4 + 1926 = 1930", "3 + 1930 = 1933"], "key": "year-1933-K♣4♣J♦4♠Q♣3♠5♥7♥"}
{"id": "test-year-0028", "level": "year", "target": 1945, "cards": [{"rank": 9, "suit": "S", "label": "9♠"}, {"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 6, "suit": "C", "label": "6♣"}, {"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 11, "suit": "S", "label": "J♠"}], "solution": "4 + 5 + 6 + 10 * (13 + 9 * (9 + 11))", "solution_steps": ["9 + 11 = 20", "9 × 20 = 180", "13 + 180 = 193", "10 × 193 = 1930", "6 + 1930 = 1936", "5 + 1936 = 1941", "4 + 1941 = 1945"], "key": "year-1945-9♠5♥9♦6♣10♥K♣4♦J♠"}
{"id": "test-year-0029", "level": "year", "target": 1947, "cards": [{"rank": 6, "suit": "C", "label": "6♣"}, {"rank": 4, "suit": "S", "label": "4♠"}, {"rank": 10, "suit": "C", "label": "10♣"}, {"rank": 12, "suit": "S", "label": "Q♠"}, {"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 10, "suit": "S", "label": "10♠"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 3, "suit": "C", "label": "3♣"}], "solution": "1 + 3 * (5 * 6 * (10 + 12) - 10) - 4", "solution_steps": ["10 + 12 = 22", "6 × 22 = 132", "5 × 132 = 660", "660 − 10 = 650", "3 × 650 = 1950", "1950 − 4 = 1946", "1 + 1946 = 1947"], "key": "year-1947-6♣4♠10♣Q♠5♣10♠A♦3♣"}
{"id": "test-year-0030", "level": "year", "target": 2059, "cards": [{"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 2, "suit": "H", "label": "2♥"}, {"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 11, "suit": "H", "label": "J♥"}, {"rank": 12, "suit": "C", "label": "Q♣"}], "solution": "2 + 7 + (7 + 11) * (6 + 9 * 12) - 2", "solution_steps": ["7 + 11 = 18", "9 × 12 = 108", "6 + 108 = 114", "18 × 114 = 2052", "7 + 2052 = 2059", "2059 − 2 = 2057", "2 + 2057 = 2059"], "key": "year-2059-6♦9♦2♠7♥2♥7♦J♥Q♣"}
{"id": "test-year-0031", "level": "year", "target": 1923, "cards": [{"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 9, "suit": "C", "label": "9♣"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 10, "suit": "S", "label": "10♠"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 7, "suit": "D", "label": "7♦"}], "solution": "1 + 4 + 11 * (5 + 10 * (8 + 9)) - 7", "solution_steps": ["8 + 9 = 17", "10 × 17 = 170", "5 + 170 = 175", "11 × 175 = 1925", "1925 − 7 = 1918", "4 + 1918 = 1922", "1 + 1922 = 1923"], "key": "year-1923-4♦5♣9♣A♦10♠8♥J♣7♦"}
{"id": "test-year-0032", "level": "year", "target": 1910, "cards": [{"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 1, "suit": "S", "label": "A♠"}, {"rank": 4, "suit": "S", "label": "4♠"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 7, "suit": "C", "label": "7♣"}, {"rank": 6, "suit": "C", "label": "6♣"}], "solution": "1 + 4 + (5 + 10) * (7 * (7 + 12) - 6)", "solution_steps": ["5 + 10 = 15", "7 + 12 = 19", "7 × 19 = 133", "133 − 6 = 127", "15 × 127 = 1905", "4 + 1905 = 1909", "1 + 1909 = 1910"], "key": "year-1910-5♦A♠4♠7♠10♥Q♦7♣6♣"}
{"id": "test-year-0033", "level": "year", "target": 1965, "cards": [{"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 10, "suit": "C", "label": "10♣"}, {"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 13, "suit": "S", "label": "K♠"}, {"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 2, "suit": "D", "label": "2♦"}], "solution": "2 + 6 * 9 + 7 * 13 * (10 + 11) - 2", "solution_steps": ["6 × 9 = 54", "10 + 11 = 21", "13 × 21 = 273", "7 × 273 = 1911", "54 + 1911 = 1965", "1965 − 2 = 1963", "2 + 1963 = 1965"], "key": "year-1965-9♥10♣2♠J♠7♦K♠6♠2♦"}
{"id": "test-year-0034", "level": "year", "target": 2069, "cards": [{"rank": 2, "suit": "D", "label": "2♦"}, {"rank": 13, "suit": "S", "label": "K♠"}, {"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 2, "suit": "H", "label": "2♥"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 1, "suit": "H", "label": "A♥"}], "solution": "1 + 3 * 6 * (11 + 2 * 4 * 13) - 2", "solution_steps": ["4 × 13 = 52", "2 × 52 = 104", "11 + 104 = 115", "6 × 115 = 690", "3 × 690 = 2070", "2070 − 2 = 2068", "1 + 2068 = 2069"], "key": "year-2069-2♦K♠J♠3♥2♥4♣6♦A♥"}
{"id": "test-year-0035", "level": "year", "target": 1995, "cards": [{"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 2, "suit": "D", "label": "2♦"}, {"rank": 8, "suit": "C", "label": "8♣"}, {"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 11, "suit": "H", "label": "J♥"}, {"rank": 1, "suit": "H", "label": "A♥"}], "solution": "1 + 2 * (9 * 11 * 11 - 8 * 11 - 4)", "solution_steps": ["11 × 11 = 121", "9 × 121 = 1089", "8 × 11 = 88", "1089 − 88 = 1001", "1001 − 4 = 997", "2 × 997 = 1994", "1 + 1994 = 1995"], "key": "year-1995-J♠9♦2♦8♣J♣4♦J♥A♥"}
{"id": "test-year-0036", "level": "year", "target": 1979, "cards": [{"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 9, "suit": "C", "label": "9♣"}, {"rank": 3, "suit": "D", "label": "3♦"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 1, "suit": "H", "label": "A♥"}], "solution": "1 + 2 + 13 * (6 + 5 * 9 * 10) / 3", "solution_steps": ["9 × 10 = 90", "5 × 90 = 450", "6 + 450 = 456", "13 × 456 = 5928", "5928 ÷ 3 = 1976", "2 + 1976 = 1978", "1 + 1978 = 1979"], "key": "year-1979-2♣9♣3♦10♦K♦5♦6♠A♥"}
{"id": "test-year-0037", "level": "year", "target": 2089, "cards": [{"rank": 13, "suit": "S", "label": "K♠"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 10, "suit": "C", "label": "10♣"}, {"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 7, "suit": "C", "label": "7♣"}, {"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 1, "suit": "C", "label": "A♣"}], "solution": "1 + 6 + 7 + 8 * 13 * (10 + 10) - 5", "solution_steps": ["10 + 10 = 20", "13 × 20 = 260", "8 × 260 = 2080", "7 + 2080 = 2087", "6 + 2087 = 2093", "2093 − 5 = 2088", "1 + 2088 = 2089"], "key": "year-2089-K♠8♠10♣6♠10♥7♣5♣A♣"}
{"id": "test-year-0038", "level": "year", "target": 2076, "cards": [{"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 12, "suit": "S", "label": "Q♠"}, {"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 2, "suit": "D", "label": "2♦"}, {"rank": 13, "suit": "S", "label": "K♠"}, {"rank": 8, "suit": "C", "label": "8♣"}], "solution": "1 + 2 + 11 * 12 * (8 + 8) - 3 * 13", "solution_steps": ["8 + 8 = 16", "12 × 16 = 192", "11 × 192 = 2112", "3 × 13 = 39", "2112 − 39 = 2073", "2 + 2073 = 2075", "1 + 2075 = 2076"], "key": "year-2076-J♠8♠Q♠A♥3♣2♦K♠8♣"}
{"id": "test-year-0039", "level": "year", "target": 1907, "cards": [{"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 10, "suit": "S", "label": "10♠"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 6, "suit": "H", "label": "6♥"}, {"rank": 11, "suit": "H", "label": "J♥"}, {"rank": 13, "suit": "H", "label": "K♥"}], "solution": "2 + 5 + 11 * (13 + 10 * (6 + 10)) - 3", "solution_steps": ["6 + 10 = 16", "10 × 16 = 160", "13 + 160 = 173", "11 × 173 = 1903", "5 + 1903 = 1908", "1908 − 3 = 1905", "2 + 1905 = 1907"], "key": "year-1907-10♦10♠3♣2♣5♥6♥J♥K♥"}
{"id": "test-year-0040", "level": "year", "target": 1902, "cards": [{"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 9, "suit": "S", "label": "9♠"}, {"rank": 7, "suit": "S", "label": "7♠"}], "solution": "4 + 6 + 5 * 10 * (5 * 9 - 7) - 8", "solution_steps": ["5 × 9 = 45", "45 − 7 = 38", "10 × 38 = 380", "5 × 380 = 1900", "1900 − 8 = 1892", "6 + 1892 = 1898", "4 + 1898 = 1902"], "key": "year-1902-5♦8♦4♦5♥10♥6♦9♠7♠"}
{"id": "test-year-0041", "level": "year", "target": 1936, "cards": [{"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 2, "suit": "H", "label": "2♥"}, {"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 12, "suit": "H", "label": "Q♥"}, {"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 12, "suit": "D", "label": "Q♦"}], "solution": "2 + 2 + 12 + 12 * (10 * (4 + 13) - 10)", "solution_steps": ["4 + 13 = 17", "10 × 17 = 170", "170 − 10 = 160", "12 × 160 = 1920", "12 + 1920 = 1932", "2 + 1932 = 1934", "2 + 1934 = 1936"], "key": "year-1936-10♦2♥10♥4♦Q♥K♦2♣Q♦"}
{"id": "test-year-0042", "level": "year", "target": 1912, "cards": [{"rank": 6, "suit": "C", "label": "6♣"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 4, "suit": "D", "label": "4♦"}], "solution": "4 + 4 + 8 * (4 + 10) * (5 + 6 + 6)", "solution_steps": ["4 + 10 = 14", "6 + 6 = 12", "5 + 12 = 17", "14 × 17 = 238", "8 × 238 = 1904", "4 + 1904 = 1908", "4 + 1908 = 1912"], "key": "year-1912-6♣4♣10♦8♥4♥5♣6♠4♦"}
{"id": "test-year-0043", "level": "year", "target": 2019, "cards": [{"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 6, "suit": "H", "label": "6♥"}, {"rank": 3, "suit": "S", "label": "3♠"}], "solution": "3 + 6 * 7 * 8 * (9 + 10 + 11) / 5", "solution_steps": ["10 + 11 = 21", "9 + 21 = 30", "8 × 30 = 240", "7 × 240 = 1680", "6 × 1680 = 10080", "10080 ÷ 5 = 2016", "3 + 2016 = 2019"], "key": "year-2019-10♥9♦8♦J♣7♠5♥6♥3♠"}
{"id": "test-year-0044", "level": "year", "target": 1920, "cards": [{"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 5, "suit": "S", "label": "5♠"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 3, "suit": "D", "label": "3♦"}, {"rank": 11, "suit": "D", "label": "J♦"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 12, "suit": "H", "label": "Q♥"}], "solution": "3 + 5 * 8 * (11 * 12 - 7 * 12) - 3", "solution_steps": ["11 × 12 = 132", "7 × 12 = 84", "132 − 84 = 48", "8 × 48 = 384", "5 × 384 = 1920", "1920 − 3 = 1917", "3 + 1917 = 1920"], "key": "year-1920-Q♦3♠5♠8♦3♦J♦7♠Q♥"}
{"id": "test-year-0045", "level": "year", "target": 2065, "cards": [{"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 11, "suit": "D", "label": "J♦"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 10, "suit": "S", "label": "10♠"}], "solution": "1 + 2 + 13 * (9 + 10 * (4 + 11)) - 5", "solution_steps": ["4 + 11 = 15", "10 × 15 = 150", "9 + 150 = 159", "13 × 159 = 2067", "2067 − 5 = 2062", "2 + 2062 = 2064", "1 + 2064 = 2065"], "key": "year-2065-K♣J♦4♦A♣5♦9♦2♠10♠"}
{"id": "test-year-0046", "level": "year", "target": 1981, "cards": [{"rank": 9, "suit": "S", "label": "9♠"}, {"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 13, "suit": "H", "label": "K♥"}, {"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 4, "suit": "H", "label": "4♥"}], "solution": "2 + 4 + (13 + 6 * 11) * (7 + 9 + 9)", "solution_steps": ["6 × 11 = 66", "13 + 66 = 79", "9 + 9 = 18", "7 + 18 = 25", "79 × 25 = 1975", "4 + 1975 = 1979", "2 + 1979 = 1981"], "key": "year-1981-9♠2♠7♠K♥6♠J♠9♦4♥"}
{"id": "test-year-0047", "level": "year", "target": 1904, "cards": [{"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 9, "suit": "C", "label": "9♣"}, {"rank": 5, "suit": "S", "label": "5♠"}, {"rank": 10, "suit": "C", "label": "10♣"}, {"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 9, "suit": "H", "label": "9♥"}], "solution": "3 + 5 + 8 * (13 * (9 + 10) - 9) - 8", "solution_steps": ["9 + 10 = 19", "13 × 19 = 247", "247 − 9 = 238", "8 × 238 = 1904", "1904 − 8 = 1896", "5 + 1896 = 1901", "3 + 1901 = 1904"], "key": "year-1904-3♠9♣5♠10♣K♦8♦8♠9♥"}
{"id": "test-year-0048", "level": "year", "target": 2083, "cards": [{"rank": 10, "suit": "S", "label": "10♠"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 7, "suit": "C", "label": "7♣"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 6, "suit": "C", "label": "6♣"}], "solution": "3 + 4 + 6 * (10 + 8 * (7 + 5 * 7))", "solution_steps": ["5 × 7 = 35", "7 + 35 = 42", "8 × 42 = 336", "10 + 336 = 346", "6 × 346 = 2076", "4 + 2076 = 2080", "3 + 2080 = 2083"], "key": "year-2083-10♠7♥5♦3♥8♥7♣4♦6♣"}
{"id": "test-year-0049", "level": "year", "target": 1962, "cards": [{"rank": 13, "suit": "H", "label": "K♥"}, {"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 12, "suit": "C", "label": "Q♣"}], "solution": "1 + 3 + 6 + 8 * (13 * (7 + 12) - 3)", "solution_steps": ["7 + 12 = 19", "13 × 19 = 247", "247 − 3 = 244", "8 × 244 = 1952", "6 + 1952 = 1958", "3 + 1958 = 1961", "1 + 1961 = 1962"], "key": "year-1962-K♥3♥7♦8♥A♦3♠6♦Q♣"}
{"id": "test-four-digit-0000", "level": "four-digit", "target": 4019, "cards": [{"rank": 3, "suit": "D", "label": "3♦"}, {"rank": 13, "suit": "S", "label": "K♠"}, {"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 9, "suit": "C", "label": "9♣"}, {"rank": 12, "suit": "H", "label": "Q♥"}, {"rank": 8, "suit": "C", "label": "8♣"}], "solution": "3 + 5 + 12 * 12 * (8 + 9 + 11) - 13 - 8", "solution_steps": ["9 + 11 = 20", "8 + 20 = 28", "12 × 28 = 336", "12 × 336 = 4032", "4032 − 13 = 4019", "4019 − 8 = 4011", "5 + 4011 = 4016", "3 + 4016 = 4019"], "key": "four-digit-4019-3♦K♠J♣8♠Q♦5♦9♣Q♥8♣"}
{"id": "test-four-digit-0001", "level": "four-digit", "target": 9682, "cards": [{"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 12, "suit": "H", "label": "Q♥"}, {"rank": 8, "suit": "C", "label": "8♣"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 9, "suit": "S", "label": "9♠"}], "solution": "1 + 3 + 6 + 12 * (4 + 9) * (8 * 8 - 2)", "solution_steps": ["4 + 9 = 13", "8 × 8 = 64", "64 − 2 = 62", "13 × 62 = 806", "12 × 806 = 9672", "6 + 9672 = 9678", "3 + 9678 = 9681", "1 + 9681 = 9682"], "key": "four-digit-9682-2♠6♦A♥Q♥8♣3♠8♦4♦9♠"}
{"id": "test-four-digit-0002", "level": "four-digit", "target": 5827, "cards": [{"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 2, "suit": "D", "label": "2♦"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 13, "suit": "D", "label": "K♦"}], "solution": "2 + 2 + 3 * (5 + 8 * (10 * (12 + 13) - 8))", "solution_steps": ["12 + 13 = 25", "10 × 25 = 250", "250 − 8 = 242", "8 × 242 = 1936", "5 + 1936 = 1941", "3 × 1941 = 5823", "2 + 5823 = 5825", "2 + 5825 = 5827"], "key": "four-digit-5827-3♥8♦8♥5♥2♦Q♦2♠10♥K♦"}
{"id": "test-four-digit-0003", "level": "four-digit", "target": 9519, "cards": [{"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 11, "suit": "D", "label": "J♦"}, {"rank": 11, "suit": "H", "label": "J♥"}, {"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 5, "suit": "S", "label": "5♠"}, {"rank": 10, "suit": "D", "label": "10♦"}], "solution": "1 + 8 + 11 + 8 * 12 * (10 * 11 - 11) - 5", "solution_steps": ["10 × 11 = 110", "110 − 11 = 99", "12 × 99 = 1188", "8 × 1188 = 9504", "11 + 9504 = 9515", "8 + 9515 = 9523", "9523 − 5 = 9518", "1 + 9518 = 9519"], "key": "four-digit-9519-J♠8♦8♠J♦J♥A♥Q♦5♠10♦"}
{"id": "test-four-digit-0004", "level": "four-digit", "target": 3786, "cards": [{"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 13, "suit": "H", "label": "K♥"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 12, "suit": "C", "label": "Q♣"}, {"rank": 1, "suit": "S", "label": "A♠"}, {"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 13, "suit": "S", "label": "K♠"}], "solution": "1 + 1 + 7 * (13 + 12 * (4 * 13 - 8)) - 3", "solution_steps": ["4 × 13 = 52", "52 − 8 = 44", "12 × 44 = 528", "13 + 528 = 541", "7 × 541 = 3787", "3787 − 3 = 3784", "1 + 3784 = 3785", "1 + 3785 = 3786"], "key": "four-digit-3786-4♦K♥8♠7♠A♦Q♣A♠3♥K♠"}
{"id": "test-four-digit-0005", "level": "four-digit", "target": 1837, "cards": [{"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 10, "suit": "C", "label": "10♣"}, {"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 11, "suit": "H", "label": "J♥"}, {"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 11, "suit": "C", "label": "J♣"}], "solution": "4 + 5 + 6 + 8 * (11 * (11 + 11) - 13) - 10", "solution_steps": ["11 + 11 = 22", "11 × 22 = 242", "242 − 13 = 229", "8 × 229 = 1832", "1832 − 10 = 1822", "6 + 1822 = 1828", "5 + 1828 = 1833", "4 + 1833 = 1837"], "key": "four-digit-1837-4♥10♣J♠8♦5♥J♥6♠K♣J♣"}
{"id": "test-four-digit-0006", "level": "four-digit", "target": 1595, "cards": [{"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 7, "suit": "C", "label": "7♣"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 12, "suit": "C", "label": "Q♣"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 3, "suit": "D", "label": "3♦"}, {"rank": 9, "suit": "C", "label": "9♣"}, {"rank": 4, "suit": "C", "label": "4♣"}], "solution": "1 + 2 + 3 + (9 + 12) * (8 * 10 - 4) - 7", "solution_steps": ["9 + 12 = 21", "8 × 10 = 80", "80 − 4 = 76", "21 × 76 = 1596", "1596 − 7 = 1589", "3 + 1589 = 1592", "2 + 1592 = 1594", "1 + 1594 = 1595"], "key": "four-digit-1595-A♥7♣2♣Q♣10♦8♠3♦9♣4♣"}
{"id": "test-four-digit-0007", "level": "four-digit", "target": 1582, "cards": [{"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 6, "suit": "C", "label": "6♣"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 13, "suit": "S", "label": "K♠"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 12, "suit": "C", "label": "Q♣"}], "solution": "2 + 3 + 3 + 4 + 10 * (7 + 12 * 13 - 6)", "solution_steps": ["12 × 13 = 156", "7 + 156 = 163", "163 − 6 = 157", "10 × 157 = 1570", "4 + 1570 = 1574", "3 + 1574 = 1577", "3 + 1577 = 1580", "2 + 1580 = 1582"], "key": "four-digit-1582-10♥6♣4♦7♦2♣3♠K♠3♣Q♣"}
{"id": "test-four-digit-0008", "level": "four-digit", "target": 8888, "cards": [{"rank": 4, "suit": "S", "label": "4♠"}, {"rank": 6, "suit": "H", "label": "6♥"}, {"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 5, "suit": "S", "label": "5♠"}, {"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 1, "suit": "S", "label": "A♠"}], "solution": "1 + 1 + 6 * (5 * 11 * (5 * 6 - 3) - 4)", "solution_steps": ["5 × 6 = 30", "30 − 3 = 27", "11 × 27 = 297", "5 × 297 = 1485", "1485 − 4 = 1481", "6 × 1481 = 8886", "1 + 8886 = 8887", "1 + 8887 = 8888"], "key": "four-digit-8888-4♠6♥6♠J♠3♣5♠5♥A♥A♠"}
{"id": "test-four-digit-0009", "level": "four-digit", "target": 5700, "cards": [{"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 5, "suit": "S", "label": "5♠"}, {"rank": 6, "suit": "C", "label": "6♣"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 11, "suit": "S", "label": "J♠"}], "solution": "1 + 3 + 5 * 5 * 6 * (11 + 3 * 9) - 4", "solution_steps": ["3 × 9 = 27", "11 + 27 = 38", "6 × 38 = 228", "5 × 228 = 1140", "5 × 1140 = 5700", "5700 − 4 = 5696", "3 + 5696 = 5699", "1 + 5699 = 5700"], "key": "four-digit-5700-A♣3♣3♠5♦4♥5♠6♣9♦J♠"}
{"id": "test-four-digit-0010", "level": "four-digit", "target": 9969, "cards": [{"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 4, "suit": "S", "label": "4♠"}, {"rank": 10, "suit": "C", "label": "10♣"}, {"rank": 10, "suit": "H", "label": "10♥"}], "solution": "2 + 3 + 4 + 10 * 12 * (9 + 8 * 10 - 6)", "solution_steps": ["8 × 10 = 80", "9 + 80 = 89", "89 − 6 = 83", "12 × 83 = 996", "10 × 996 = 9960", "4 + 9960 = 9964", "3 + 9964 = 9967", "2 + 9967 = 9969"], "key": "four-digit-9969-2♣8♦Q♦9♦3♥6♦4♠10♣10♥"}
{"id": "test-four-digit-0011", "level": "four-digit", "target": 4740, "cards": [{"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 13, "suit": "H", "label": "K♥"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 1, "suit": "S", "label": "A♠"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 12, "suit": "H", "label": "Q♥"}], "solution": "1 + 1 + 4 + 6 * (3 * 12 * (9 + 13) - 3)", "solution_steps": ["9 + 13 = 22", "12 × 22 = 264", "3 × 264 = 792", "792 − 3 = 789", "6 × 789 = 4734", "4 + 4734 = 4738", "1 + 4738 = 4739", "1 + 4739 = 4740"], "key": "four-digit-4740-9♦K♥4♦6♠3♥3♠A♠A♦Q♥"}
{"id": "test-four-digit-0012", "level": "four-digit", "target": 2464, "cards": [{"rank": 3, "suit": "D", "label": "3♦"}, {"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 12, "suit": "S", "label": "Q♠"}, {"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 9, "suit": "C", "label": "9♣"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 13, "suit": "S", "label": "K♠"}], "solution": "1 + 3 + 3 + 9 * (12 * (11 + 13) - 10 - 5)", "solution_steps": ["11 + 13 = 24", "12 × 24 = 288", "288 − 10 = 278", "278 − 5 = 273", "9 × 273 = 2457", "3 + 2457 = 2460", "3 + 2460 = 2463", "1 + 2463 = 2464"], "key": "four-digit-2464-3♦5♣A♣Q♠J♠3♥9♣10♦K♠"}
{"id": "test-four-digit-0013", "level": "four-digit", "target": 9271, "cards": [{"rank": 10, "suit": "C", "label": "10♣"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 13, "suit": "H", "label": "K♥"}, {"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 9, "suit": "C", "label": "9♣"}, {"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 6, "suit": "S", "label": "6♠"}], "solution": "3 + 4 + 13 * (9 + 11 * (10 + 6 * 9)) - 5", "solution_steps": ["6 × 9 = 54", "10 + 54 = 64", "11 × 64 = 704", "9 + 704 = 713", "13 × 713 = 9269", "9269 − 5 = 9264", "4 + 9264 = 9268", "3 + 9268 = 9271"], "key": "four-digit-9271-10♣9♥K♥5♥3♣9♣J♠4♦6♠"}
{"id": "test-four-digit-0014", "level": "four-digit", "target": 1310, "cards": [{"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 5, "suit": "S", "label": "5♠"}, {"rank": 9, "suit": "C", "label": "9♣"}, {"rank": 10, "suit": "C", "label": "10♣"}, {"rank": 9, "suit": "S", "label": "9♠"}, {"rank": 11, "suit": "D", "label": "J♦"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 5, "suit": "D", "label": "5♦"}], "solution": "3 + 5 + 8 + 5 * 9 * (9 + 10 + 10) - 11", "solution_steps": ["10 + 10 = 20", "9 + 20 = 29", "9 × 29 = 261", "5 × 261 = 1305", "1305 − 11 = 1294", "8 + 1294 = 1302", "5 + 1302 = 1307", "3 + 1307 = 1310"], "key": "four-digit-1310-10♥5♠9♣10♣9♠J♦8♦3♥5♦"}
{"id": "test-four-digit-0015", "level": "four-digit", "target": 3440, "cards": [{"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 12, "suit": "S", "label": "Q♠"}, {"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 9, "suit": "S", "label": "9♠"}, {"rank": 1, "suit": "S", "label": "A♠"}, {"rank": 12, "suit": "H", "label": "Q♥"}], "solution": "1 + 5 + 8 * (10 + (8 + 12) * (9 + 12)) - 6", "solution_steps": ["8 + 12 = 20", "9 + 12 = 21", "20 × 21 = 420", "10 + 420 = 430", "8 × 430 = 3440", "3440 − 6 = 3434", "5 + 3434 = 3439", "1 + 3439 = 3440"], "key": "four-digit-3440-5♣8♥Q♠6♦10♦8♠9♠A♠Q♥"}
{"id": "test-four-digit-0016", "level": "four-digit", "target": 2467, "cards": [{"rank": 6, "suit": "C", "label": "6♣"}, {"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 11, "suit": "D", "label": "J♦"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 10, "suit": "H", "label": "10♥"}], "solution": "1 + 2 + 11 + 7 * (6 * 6 * 10 - 9) - 4", "solution_steps": ["6 × 10 = 60", "6 × 60 = 360", "360 − 9 = 351", "7 × 351 = 2457", "11 + 2457 = 2468", "2468 − 4 = 2464", "2 + 2464 = 2466", "1 + 2466 = 2467"], "key": "four-digit-2467-6♣6♦2♣A♦4♣J♦9♥7♦10♥"}
{"id": "test-four-digit-0017", "level": "four-digit", "target": 2363, "cards": [{"rank": 9, "suit": "C", "label": "9♣"}, {"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 12, "suit": "H", "label": "Q♥"}], "solution": "2 + 3 + 3 + 5 * (8 * (12 + 4 * 12) - 9)", "solution_steps": ["4 × 12 = 48", "12 + 48 = 60", "8 × 60 = 480", "480 − 9 = 471", "5 × 471 = 2355", "3 + 2355 = 2358", "3 + 2358 = 2361", "2 + 2361 = 2363"], "key": "four-digit-2363-9♣5♣Q♦2♠3♣4♥3♥8♠Q♥"}
{"id": "test-four-digit-0018", "level": "four-digit", "target": 5010, "cards": [{"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 11, "suit": "D", "label": "J♦"}, {"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 10, "suit": "C", "label": "10♣"}, {"rank": 12, "suit": "S", "label": "Q♠"}, {"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 9, "suit": "D", "label": "9♦"}], "solution": "5 + 7 + 11 + 10 * (9 + 11) * (12 + 13) - 13", "solution_steps": ["9 + 11 = 20", "12 + 13 = 25", "20 × 25 = 500", "10 × 500 = 5000", "5000 − 13 = 4987", "11 + 4987 = 4998", "7 + 4998 = 5005", "5 + 5005 = 5010"], "key": "four-digit-5010-7♥K♦5♣J♦J♣10♣Q♠K♣9♦"}
{"id": "test-four-digit-0019", "level": "four-digit", "target": 1171, "cards": [{"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 9, "suit": "C", "label": "9♣"}, {"rank": 12, "suit": "S", "label": "Q♠"}, {"rank": 7, "suit": "C", "label": "7♣"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 3, "suit": "H", "label": "3♥"}], "solution": "2 + 3 + 9 * (9 + 7 * (7 + 12) - 12) - 4", "solution_steps": ["7 + 12 = 19", "7 × 19 = 133", "133 − 12 = 121", "9 + 121 = 130", "9 × 130 = 1170", "1170 − 4 = 1166", "3 + 1166 = 1169", "2 + 1169 = 1171"], "key": "four-digit-1171-2♠9♥9♣Q♠7♣4♦Q♦7♠3♥"}
{"id": "test-four-digit-0020", "level": "four-digit", "target": 8724, "cards": [{"rank": 10, "suit": "C", "label": "10♣"}, {"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 5, "suit": "S", "label": "5♠"}, {"rank": 9, "suit": "S", "label": "9♠"}], "solution": "4 + 5 + 8 * (11 * (9 + 7 * 13) - 10) - 5", "solution_steps": ["7 × 13 = 91", "9 + 91 = 100", "11 × 100 = 1100", "1100 − 10 = 1090", "8 × 1090 = 8720", "8720 − 5 = 8715", "5 + 8715 = 8720", "4 + 8720 = 8724"], "key": "four-digit-8724-10♣J♠K♦7♦4♣5♦8♠5♠9♠"}
{"id": "test-four-digit-0021", "level": "four-digit", "target": 1065, "cards": [{"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 10, "suit": "S", "label": "10♠"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 3, "suit": "D", "label": "3♦"}, {"rank": 13, "suit": "D", "label": "K♦"}], "solution": "1 + 1 + 2 + 7 * 8 * (10 + 13 - 4) - 3", "solution_steps": ["10 + 13 = 23", "23 − 4 = 19", "8 × 19 = 152", "7 × 152 = 1064", "1064 − 3 = 1061", "2 + 1061 = 1063", "1 + 1063 = 1064", "1 + 1064 = 1065"], "key": "four-digit-1065-A♣8♦7♥10♠A♦4♥2♠3♦K♦"}
{"id": "test-four-digit-0022", "level": "four-digit", "target": 5841, "cards": [{"rank": 10, "suit": "S", "label": "10♠"}, {"rank": 12, "suit": "H", "label": "Q♥"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 1, "suit": "S", "label": "A♠"}, {"rank": 3, "suit": "D", "label": "3♦"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 7, "suit": "S", "label": "7♠"}], "solution": "1 + 2 + 3 * 7 * (10 + 12 * (11 + 12) - 8)", "solution_steps": ["11 + 12 = 23", "12 × 23 = 276", "10 + 276 = 286", "286 − 8 = 278", "7 × 278 = 1946", "3 × 1946 = 5838", "2 + 5838 = 5840", "1 + 5840 = 5841"], "key": "four-digit-5841-10♠Q♥2♣J♣A♠3♦Q♦8♠7♠"}
{"id": "test-four-digit-0023", "level": "four-digit", "target": 4726, "cards": [{"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 3, "suit": "D", "label": "3♦"}, {"rank": 5, "suit": "S", "label": "5♠"}, {"rank": 12, "suit": "H", "label": "Q♥"}, {"rank": 5, "suit": "H", "label": "5♥"}, {"rank": 12, "suit": "C", "label": "Q♣"}, {"rank": 8, "suit": "C", "label": "8♣"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 4, "suit": "H", "label": "4♥"}], "solution": "3 + 4 + (8 + 5 * 5) * (7 + 12 * 12 - 8)", "solution_steps": ["5 × 5 = 25", "8 + 25 = 33", "12 × 12 = 144", "144 − 8 = 136", "7 + 136 = 143", "33 × 143 = 4719", "4 + 4719 = 4723", "3 + 4723 = 4726"], "key": "four-digit-4726-8♥3♦5♠Q♥5♥Q♣8♣7♥4♥"}
{"id": "test-four-digit-0024", "level": "four-digit", "target": 8306, "cards": [{"rank": 9, "suit": "C", "label": "9♣"}, {"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 6, "suit": "H", "label": "6♥"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 12, "suit": "C", "label": "Q♣"}], "solution": "1 + 1 + 6 * (5 + 11 + 8 * 9 * (7 + 12))", "solution_steps": ["7 + 12 = 19", "9 × 19 = 171", "8 × 171 = 1368", "11 + 1368 = 1379", "5 + 1379 = 1384", "6 × 1384 = 8304", "1 + 8304 = 8305", "1 + 8305 = 8306"], "key": "four-digit-8306-9♣A♣A♦5♦6♥8♥J♠7♠Q♣"}
{"id": "test-four-digit-0025", "level": "four-digit", "target": 9977, "cards": [{"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 12, "suit": "C", "label": "Q♣"}, {"rank": 6, "suit": "C", "label": "6♣"}, {"rank": 6, "suit": "H", "label": "6♥"}, {"rank": 7, "suit": "C", "label": "7♣"}, {"rank": 13, "suit": "H", "label": "K♥"}, {"rank": 2, "suit": "H", "label": "2♥"}, {"rank": 4, "suit": "C", "label": "4♣"}], "solution": "1 + 12 * 13 * (6 * (4 + 7) - 2) - 6 - 2", "solution_steps": ["4 + 7 = 11", "6 × 11 = 66", "66 − 2 = 64", "13 × 64 = 832", "12 × 832 = 9984", "9984 − 6 = 9978", "9978 − 2 = 9976", "1 + 9976 = 9977"], "key": "four-digit-9977-2♠A♥Q♣6♣6♥7♣K♥2♥4♣"}
{"id": "test-four-digit-0026", "level": "four-digit", "target": 6331, "cards": [{"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 2, "suit": "H", "label": "2♥"}, {"rank": 12, "suit": "H", "label": "Q♥"}, {"rank": 9, "suit": "S", "label": "9♠"}, {"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 9, "suit": "D", "label": "9♦"}], "solution": "2 + 9 * 12 + 7 * 9 * 9 * 11 - 13 - 3", "solution_steps": ["9 × 12 = 108", "9 × 11 = 99", "9 × 99 = 891", "7 × 891 = 6237", "108 + 6237 = 6345", "6345 − 13 = 6332", "6332 − 3 = 6329", "2 + 6329 = 6331"], "key": "four-digit-6331-J♠7♠2♥Q♥9♠K♦9♥3♣9♦"}
{"id": "test-four-digit-0027", "level": "four-digit", "target": 7465, "cards": [{"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 9, "suit": "C", "label": "9♣"}, {"rank": 12, "suit": "H", "label": "Q♥"}, {"rank": 6, "suit": "C", "label": "6♣"}, {"rank": 4, "suit": "H", "label": "4♥"}], "solution": "1 + 1 + 4 + 7 + 9 * 12 * (9 + 6 * 10)", "solution_steps": ["6 × 10 = 60", "9 + 60 = 69", "12 × 69 = 828", "9 × 828 = 7452", "7 + 7452 = 7459", "4 + 7459 = 7463", "1 + 7463 = 7464", "1 + 7464 = 7465"], "key": "four-digit-7465-A♥A♣10♦7♥9♦9♣Q♥6♣4♥"}
{"id": "test-four-digit-0028", "level": "four-digit", "target": 6695, "cards": [{"rank": 3, "suit": "D", "label": "3♦"}, {"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 12, "suit": "S", "label": "Q♠"}, {"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 13, "suit": "S", "label": "K♠"}, {"rank": 9, "suit": "C", "label": "9♣"}], "solution": "1 + 3 / 3 + 9 * 12 * (13 + 7 * 7) - 3", "solution_steps": ["3 ÷ 3 = 1", "7 × 7 = 49", "13 + 49 = 62", "12 × 62 = 744", "9 × 744 = 6696", "1 + 6696 = 6697", "6697 − 3 = 6694", "1 + 6694 = 6695"], "key": "four-digit-6695-3♦3♥Q♠7♦7♥3♠A♣K♠9♣"}
{"id": "test-four-digit-0029", "level": "four-digit", "target": 3782, "cards": [{"rank": 2, "suit": "D", "label": "2♦"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 9, "suit": "S", "label": "9♠"}, {"rank": 3, "suit": "D", "label": "3♦"}, {"rank": 12, "suit": "H", "label": "Q♥"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 5, "suit": "C", "label": "5♣"}], "solution": "2 + 2 + 4 + 3 * 5 * 12 * (9 + 12) - 6", "solution_steps": ["9 + 12 = 21", "12 × 21 = 252", "5 × 252 = 1260", "3 × 1260 = 3780", "3780 − 6 = 3774", "4 + 3774 = 3778", "2 + 3778 = 3780", "2 + 3780 = 3782"], "key": "four-digit-3782-2♦4♣Q♦9♠3♦Q♥2♣6♦5♣"}
{"id": "test-four-digit-0030", "level": "four-digit", "target": 1969, "cards": [{"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 9, "suit": "C", "label": "9♣"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 12, "suit": "C", "label": "Q♣"}], "solution": "1 + 3 + 7 * (10 + 13 * (9 + 12)) - 9 - 7", "solution_steps": ["9 + 12 = 21", "13 × 21 = 273", "10 + 273 = 283", "7 × 283 = 1981", "1981 − 9 = 1972", "1972 − 7 = 1965", "3 + 1965 = 1968", "1 + 1968 = 1969"], "key": "four-digit-1969-A♣7♥9♣3♠K♦7♦9♥10♦Q♣"}
{"id": "test-four-digit-0031", "level": "four-digit", "target": 7783, "cards": [{"rank": 2, "suit": "H", "label": "2♥"}, {"rank": 6, "suit": "C", "label": "6♣"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 7, "suit": "D", "label": "7♦"}, {"rank": 6, "suit": "H", "label": "6♥"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 9, "suit": "C", "label": "9♣"}], "solution": "1 + 2 + 4 + 2 * 9 * 9 * (6 + 6 * 7)", "solution_steps": ["6 × 7 = 42", "6 + 42 = 48", "9 × 48 = 432", "9 × 432 = 3888", "2 × 3888 = 7776", "4 + 7776 = 7780", "2 + 7780 = 7782", "1 + 7782 = 7783"], "key": "four-digit-7783-2♥6♣2♣9♦7♦6♥4♣A♣9♣"}
{"id": "test-four-digit-0032", "level": "four-digit", "target": 6737, "cards": [{"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 10, "suit": "C", "label": "10♣"}, {"rank": 12, "suit": "H", "label": "Q♥"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 2, "suit": "H", "label": "2♥"}, {"rank": 1, "suit": "S", "label": "A♠"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 12, "suit": "C", "label": "Q♣"}, {"rank": 2, "suit": "D", "label": "2♦"}], "solution": "1 + 1 * 2 * (8 + 12 * (2 + 12) * (10 + 10))", "solution_steps": ["2 + 12 = 14", "10 + 10 = 20", "14 × 20 = 280", "12 × 280 = 3360", "8 + 3360 = 3368", "2 × 3368 = 6736", "1 × 6736 = 6736", "1 + 6736 = 6737"], "key": "four-digit-6737-10♥10♣Q♥8♦2♥A♠A♦Q♣2♦"}
{"id": "test-four-digit-0033", "level": "four-digit", "target": 7347, "cards": [{"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 11, "suit": "H", "label": "J♥"}, {"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 12, "suit": "H", "label": "Q♥"}, {"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 7, "suit": "S", "label": "7♠"}], "solution": "1 + 2 + 3 * (12 + 12 * (10 * (10 + 11) - 7))", "solution_steps": ["10 + 11 = 21", "10 × 21 = 210", "210 − 7 = 203", "12 × 203 = 2436", "12 + 2436 = 2448", "3 × 2448 = 7344", "2 + 7344 = 7346", "1 + 7346 = 7347"], "key": "four-digit-7347-A♣J♥3♥10♦Q♦Q♥10♥2♠7♠"}
{"id": "test-four-digit-0034", "level": "four-digit", "target": 4868, "cards": [{"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 12, "suit": "S", "label": "Q♠"}, {"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 13, "suit": "H", "label": "K♥"}, {"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 2, "suit": "D", "label": "2♦"}, {"rank": 7, "suit": "D", "label": "7♦"}], "solution": "1 + 1 + 12 * (6 * (11 * 13 - 7) - 5) / 2", "solution_steps": ["11 × 13 = 143", "143 − 7 = 136", "6 × 136 = 816", "816 − 5 = 811", "12 × 811 = 9732", "9732 ÷ 2 = 4866", "1 + 4866 = 4867", "1 + 4867 = 4868"], "key": "four-digit-4868-A♥Q♠6♦A♣K♥5♦J♠2♦7♦"}
{"id": "test-four-digit-0035", "level": "four-digit", "target": 4104, "cards": [{"rank": 11, "suit": "H", "label": "J♥"}, {"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 13, "suit": "H", "label": "K♥"}, {"rank": 8, "suit": "C", "label": "8♣"}], "solution": "1 + 2 + 6 + 7 * 9 * 13 * (8 - (11 - 8))", "solution_steps": ["11 − 8 = 3", "8 − 3 = 5", "13 × 5 = 65", "9 × 65 = 585", "7 × 585 = 4095", "6 + 4095 = 4101", "2 + 4101 = 4103", "1 + 4103 = 4104"], "key": "four-digit-4104-J♥2♠9♦6♠7♠8♠A♥K♥8♣"}
{"id": "test-four-digit-0036", "level": "four-digit", "target": 8493, "cards": [{"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 8, "suit": "H", "label": "8♥"}], "solution": "1 + 2 + 3 * 10 * (8 * 11 + 13 * (7 + 8))", "solution_steps": ["8 × 11 = 88", "7 + 8 = 15", "13 × 15 = 195", "88 + 195 = 283", "10 × 283 = 2830", "3 × 2830 = 8490", "2 + 8490 = 8492", "1 + 8492 = 8493"], "key": "four-digit-8493-K♦10♥2♣8♦J♣7♠A♦3♥8♥"}
{"id": "test-four-digit-0037", "level": "four-digit", "target": 6088, "cards": [{"rank": 1, "suit": "S", "label": "A♠"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 5, "suit": "S", "label": "5♠"}, {"rank": 10, "suit": "C", "label": "10♣"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 10, "suit": "S", "label": "10♠"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 2, "suit": "C", "label": "2♣"}], "solution": "1 + 2 + 5 + 10 * (4 * 9 * (7 + 10) - 4)", "solution_steps": ["7 + 10 = 17", "9 × 17 = 153", "4 × 153 = 612", "612 − 4 = 608", "10 × 608 = 6080", "5 + 6080 = 6085", "2 + 6085 = 6087", "1 + 6087 = 6088"], "key": "four-digit-6088-A♠7♠5♠10♣9♥4♣10♠4♦2♣"}
{"id": "test-four-digit-0038", "level": "four-digit", "target": 7780, "cards": [{"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 3, "suit": "C", "label": "3♣"}, {"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 13, "suit": "S", "label": "K♠"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 12, "suit": "S", "label": "Q♠"}], "solution": "3 + 6 + (9 + 10) * (13 + 12 * (7 + 13 + 13))", "solution_steps": ["9 + 10 = 19", "13 + 13 = 26", "7 + 26 = 33", "12 × 33 = 396", "13 + 396 = 409", "19 × 409 = 7771", "6 + 7771 = 7777", "3 + 7777 = 7780"], "key": "four-digit-7780-7♠3♣K♣K♠10♦6♦9♥K♦Q♠"}
{"id": "test-four-digit-0039", "level": "four-digit", "target": 3041, "cards": [{"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 10, "suit": "S", "label": "10♠"}, {"rank": 3, "suit": "D", "label": "3♦"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 2, "suit": "D", "label": "2♦"}], "solution": "2 + 3 + 3 * 4 * (10 * (6 + 10 + 10) - 7)", "solution_steps": ["10 + 10 = 20", "6 + 20 = 26", "10 × 26 = 260", "260 − 7 = 253", "4 × 253 = 1012", "3 × 1012 = 3036", "3 + 3036 = 3039", "2 + 3039 = 3041"], "key": "four-digit-3041-6♠10♥3♥10♠3♦4♦7♠10♦2♦"}
{"id": "test-four-digit-0040", "level": "four-digit", "target": 3145, "cards": [{"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 2, "suit": "S", "label": "2♠"}, {"rank": 5, "suit": "C", "label": "5♣"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 2, "suit": "D", "label": "2♦"}, {"rank": 5, "suit": "S", "label": "5♠"}, {"rank": 3, "suit": "D", "label": "3♦"}, {"rank": 6, "suit": "D", "label": "6♦"}, {"rank": 4, "suit": "S", "label": "4♠"}], "solution": "2 + 5 * (5 + 4 * 4 * (3 + 6 * 6)) - 2", "solution_steps": ["6 × 6 = 36", "3 + 36 = 39", "4 × 39 = 156", "4 × 156 = 624", "5 + 624 = 629", "5 × 629 = 3145", "3145 − 2 = 3143", "2 + 3143 = 3145"], "key": "four-digit-3145-6♠2♠5♣4♦2♦5♠3♦6♦4♠"}
{"id": "test-four-digit-0041", "level": "four-digit", "target": 8353, "cards": [{"rank": 5, "suit": "D", "label": "5♦"}, {"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 9, "suit": "C", "label": "9♣"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 4, "suit": "S", "label": "4♠"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 12, "suit": "S", "label": "Q♠"}, {"rank": 2, "suit": "D", "label": "2♦"}, {"rank": 2, "suit": "C", "label": "2♣"}], "solution": "1 + 2 + 2 * 5 * (4 + 7 * 10 * 12 - 9)", "solution_steps": ["10 × 12 = 120", "7 × 120 = 840", "840 − 9 = 831", "4 + 831 = 835", "5 × 835 = 4175", "2 × 4175 = 8350", "2 + 8350 = 8352", "1 + 8352 = 8353"], "key": "four-digit-8353-5♦10♥9♣7♠4♠A♦Q♠2♦2♣"}
{"id": "test-four-digit-0042", "level": "four-digit", "target": 2125, "cards": [{"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 7, "suit": "C", "label": "7♣"}, {"rank": 9, "suit": "D", "label": "9♦"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 2, "suit": "D", "label": "2♦"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 11, "suit": "S", "label": "J♠"}], "solution": "2 + 3 + 9 * (7 * 8 + 10 * (7 + 11)) - 4", "solution_steps": ["7 × 8 = 56", "7 + 11 = 18", "10 × 18 = 180", "56 + 180 = 236", "9 × 236 = 2124", "2124 − 4 = 2120", "3 + 2120 = 2123", "2 + 2123 = 2125"], "key": "four-digit-2125-4♥7♣9♦8♦3♥2♦7♠10♥J♠"}
{"id": "test-four-digit-0043", "level": "four-digit", "target": 1179, "cards": [{"rank": 10, "suit": "S", "label": "10♠"}, {"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 12, "suit": "C", "label": "Q♣"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 2, "suit": "D", "label": "2♦"}, {"rank": 7, "suit": "S", "label": "7♠"}, {"rank": 6, "suit": "C", "label": "6♣"}, {"rank": 2, "suit": "H", "label": "2♥"}], "solution": "2 + 2 + 6 + 13 * (7 + 7 * 12) - 10 - 4", "solution_steps": ["7 × 12 = 84", "7 + 84 = 91", "13 × 91 = 1183", "1183 − 10 = 1173", "6 + 1173 = 1179", "1179 − 4 = 1175", "2 + 1175 = 1177", "2 + 1177 = 1179"], "key": "four-digit-1179-10♠K♦Q♣7♥4♥2♦7♠6♣2♥"}
{"id": "test-four-digit-0044", "level": "four-digit", "target": 6978, "cards": [{"rank": 10, "suit": "C", "label": "10♣"}, {"rank": 5, "suit": "S", "label": "5♠"}, {"rank": 1, "suit": "D", "label": "A♦"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 6, "suit": "S", "label": "6♠"}, {"rank": 11, "suit": "D", "label": "J♦"}, {"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 8, "suit": "H", "label": "8♥"}], "solution": "1 + 1 + 2 * 4 * (5 * 11 * (6 + 10) - 8)", "solution_steps": ["6 + 10 = 16", "11 × 16 = 176", "5 × 176 = 880", "880 − 8 = 872", "4 × 872 = 3488", "2 × 3488 = 6976", "1 + 6976 = 6977", "1 + 6977 = 6978"], "key": "four-digit-6978-10♣5♠A♦2♣6♠J♦A♣4♥8♥"}
{"id": "test-four-digit-0045", "level": "four-digit", "target": 7994, "cards": [{"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 2, "suit": "H", "label": "2♥"}, {"rank": 9, "suit": "C", "label": "9♣"}, {"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 12, "suit": "S", "label": "Q♠"}, {"rank": 7, "suit": "C", "label": "7♣"}], "solution": "1 + 2 + 12 * (7 + 12 * (7 * 9 - 8)) - 13", "solution_steps": ["7 × 9 = 63", "63 − 8 = 55", "12 × 55 = 660", "7 + 660 = 667", "12 × 667 = 8004", "8004 − 13 = 7991", "2 + 7991 = 7993", "1 + 7993 = 7994"], "key": "four-digit-7994-A♣Q♦7♥2♥9♣K♦8♦Q♠7♣"}
{"id": "test-four-digit-0046", "level": "four-digit", "target": 7865, "cards": [{"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 3, "suit": "S", "label": "3♠"}, {"rank": 10, "suit": "D", "label": "10♦"}, {"rank": 1, "suit": "C", "label": "A♣"}, {"rank": 13, "suit": "C", "label": "K♣"}, {"rank": 8, "suit": "D", "label": "8♦"}, {"rank": 4, "suit": "D", "label": "4♦"}, {"rank": 6, "suit": "H", "label": "6♥"}, {"rank": 1, "suit": "D", "label": "A♦"}], "solution": "1 + 13 * (4 * 4 * (6 * 8 - 10) - 3) - 1", "solution_steps": ["6 × 8 = 48", "48 − 10 = 38", "4 × 38 = 152", "4 × 152 = 608", "608 − 3 = 605", "13 × 605 = 7865", "7865 − 1 = 7864", "1 + 7864 = 7865"], "key": "four-digit-7865-4♥3♠10♦A♣K♣8♦4♦6♥A♦"}
{"id": "test-four-digit-0047", "level": "four-digit", "target": 5269, "cards": [{"rank": 1, "suit": "H", "label": "A♥"}, {"rank": 7, "suit": "C", "label": "7♣"}, {"rank": 11, "suit": "C", "label": "J♣"}, {"rank": 8, "suit": "C", "label": "8♣"}, {"rank": 12, "suit": "D", "label": "Q♦"}, {"rank": 3, "suit": "D", "label": "3♦"}, {"rank": 11, "suit": "S", "label": "J♠"}, {"rank": 10, "suit": "H", "label": "10♥"}, {"rank": 8, "suit": "D", "label": "8♦"}], "solution": "1 + 3 + 10 + 11 + 12 * (7 * 8 * 8 - 11)", "solution_steps": ["8 × 8 = 64", "7 × 64 = 448", "448 − 11 = 437", "12 × 437 = 5244", "11 + 5244 = 5255", "10 + 5255 = 5265", "3 + 5265 = 5268", "1 + 5268 = 5269"], "key": "four-digit-5269-A♥7♣J♣8♣Q♦3♦J♠10♥8♦"}
{"id": "test-four-digit-0048", "level": "four-digit", "target": 6062, "cards": [{"rank": 4, "suit": "H", "label": "4♥"}, {"rank": 7, "suit": "H", "label": "7♥"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 13, "suit": "D", "label": "K♦"}, {"rank": 3, "suit": "H", "label": "3♥"}, {"rank": 1, "suit": "S", "label": "A♠"}, {"rank": 13, "suit": "S", "label": "K♠"}, {"rank": 10, "suit": "C", "label": "10♣"}, {"rank": 6, "suit": "C", "label": "6♣"}], "solution": "1 + 3 + 4 + 6 * (8 + 7 * (13 + 10 * 13))", "solution_steps": ["10 × 13 = 130", "13 + 130 = 143", "7 × 143 = 1001", "8 + 1001 = 1009", "6 × 1009 = 6054", "4 + 6054 = 6058", "3 + 6058 = 6061", "1 + 6061 = 6062"], "key": "four-digit-6062-4♥7♥8♠K♦3♥A♠K♠10♣6♣"}
{"id": "test-four-digit-0049", "level": "four-digit", "target": 6531, "cards": [{"rank": 6, "suit": "C", "label": "6♣"}, {"rank": 8, "suit": "H", "label": "8♥"}, {"rank": 8, "suit": "C", "label": "8♣"}, {"rank": 2, "suit": "C", "label": "2♣"}, {"rank": 8, "suit": "S", "label": "8♠"}, {"rank": 4, "suit": "C", "label": "4♣"}, {"rank": 9, "suit": "H", "label": "9♥"}, {"rank": 13, "suit": "H", "label": "K♥"}, {"rank": 3, "suit": "C", "label": "3♣"}], "solution": "2 + 3 + 13 * (4 + 9 * (8 * 8 - 8) - 6)", "solution_steps": ["8 × 8 = 64", "64 − 8 = 56", "9 × 56 = 504", "504 − 6 = 498", "4 + 498 = 502", "13 × 502 = 6526", "3 + 6526 = 6529", "2 + 6529 = 6531"], "key": "four-digit-6531-6♣8♥8♣2♣8♠4♣9♥K♥3♣"}