Chess
Play the browser AI, get post-move feedback from a transparent local 2-ply model, then retry your saved mistakes. Tactics and Daily stay one tap away.
Retry your mistakes
Moves flagged Risky or Costly by the same local 2-ply coach are saved privately in this browser. Find the coach’s better move without seeing the answer first.
Pattern Recognition Academy
Mate in One, Fork, Winning Material and Forcing Check with mastery checkpoints, Weak Tactics and Sprint 60.
Game record & recent sessionsMoves, local history and review queue
Current game
Rules, integrity & scopeSpecial moves, draws and what the coach does
No shortcuts around check
Moves are legal only if your king is safe afterward. Castling, en passant, promotion and pins use the same legality filter.
Transparent, limited feedback
Move labels compare your choice with this site’s local 2-ply search. They are not Stockfish, Elo, centipawn-loss certification or authoritative chess analysis.
Help changes the label
Hint, Undo or Restart marks the game Assisted. Post-move feedback appears only after your move and does not alter Clean status.
Stable date contract
The date fixes your color and AI tie-break seed. Daily is untimed and remains a Practice specialist, never a Today’s 6 slot.
Optional local pressure
Untimed, 10+0, 5+0 and 3+2 are available for Practice and Match. Browser tab throttling is handled from elapsed timestamps, not animation frames.
Browser-local practice
Games, coach labels, saved mistake positions and recent history remain in this browser. No account, rating, wager or cloud engine is required.