Chess

Easy plays at a shallow search depth with frequent random moves, medium searches deeper with occasional randomness, and hard uses deeper iterative search with move ordering. Beating hard requires accurate calculation — your result also counts toward your Strategy score in the ability map.

No. Once the game ends in checkmate, stalemate or a draw, the result is final and undo is disabled, so every recorded win is genuine. You can use undo freely during an ongoing game.

Changing the AI setting or difficulty mid-game would let a player move both sides, which makes the result meaningless. Start a new game to change these settings.

Yes — castling, en passant, promotion, the fifty-move rule, threefold repetition and insufficient material draws are all implemented, with automatic detection of check, checkmate and stalemate.

Only games played against the AI count. The score combines the game result (win, draw or loss) with the AI difficulty you chose — beating a harder AI earns more.

Chess engages planning, calculation and pattern recognition. It is an enjoyable way to exercise strategic thinking, though transferring those gains to unrelated tasks is limited — play it for the challenge itself.