Josh-HeapsandClaude Opus 4.8
5345427e0c
- Refactor the search to negamax (single side-relative score + alpha/beta window) - Add a shared, process-wide transposition table: lock-free XOR-verified slots, persists across games, with depth-gated and difficulty-capped score reuse so a weak bot can't borrow a stronger game's deeper analysis - Drive the search with iterative deepening, seeding each depth's move ordering from the previous one - Seed prior-position history (Position::seed_history) over a new engine_best_move history parameter so the engine detects threefold/50-move draws the FEN can't carry Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>