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{
"id": "chess_mate_001",
"category": "logic_games",
"subcategory": "chess",
"question": "White to move. Find the checkmate in 2 moves. Position: White Kh1, Qd1, Rf1; Black Kg8, Rf8, pawns g7, h7.",
"input_images": [
{
"path": "images/chess_mate_001_input.png",
"description": "Initial chess position"
}
],
"reasoning_steps": [
{
"step": 1,
"type": "interleaved",
"content": "Analyze the position: Black king is on g8, restricted by pawns on g7 and h7. The back rank is weak with only Rf8 defending.",
"image_path": "images/chess_mate_001_step1.png",
"intermediate_result": "Back rank weakness identified"
},
{
"step": 2,
"type": "text",
"content": "Consider Qd8: This attacks the rook and threatens back rank mate. Black must respond to the threat.",
"intermediate_result": "Candidate move: Qd8"
},
{
"step": 3,
"type": "interleaved",
"content": "After 1.Qd8 Rxd8, White plays 2.Rxf8#. The rook delivers checkmate on the back rank.",
"image_path": "images/chess_mate_001_step3.png",
"intermediate_result": "Checkmate confirmed"
}
],
"answer": "1.Qd8+ Rxd8 2.Rxf8# (Back rank mate)",
"metadata": {
"difficulty": "easy",
"source": "synthetic",
"tags": ["back-rank-mate", "queen-sacrifice", "mate-in-2"]
}
}
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