| { | |
| "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"] | |
| } | |
| } | |