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Enhances quiescence search with better draw detection and check handling: - Add draw detection: fifty-move rule, insufficient material, repetition - Proper check handling: when in check, search all evasions instead of only tactical moves (position is unstable, can't use stand-pat) - Add is_tactical_move() helper for cleaner move filtering - Update organize_moves_quiescence() to use tactical move detection Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Summary
is_tactical_move()helper for cleaner tactical move detectionDetails
Draw Detection
The quiescence search now detects draws:
board.is_fifty_moves()board.is_insufficient_material()board.is_repetition(2)after each moveCheck Handling
When in check, the position is unstable and we can't use stand-pat for pruning:
Tactical Move Detection
New
is_tactical_move()function that identifies:Previously used
is_zeroing()which included quiet pawn pushes.Test plan
🤖 Generated with Claude Code