Two engraved hands reach toward a chess king marked with a red question mark; one hand holds a red fountain pen.

« All chess players are artists. » « Some of you are crime scenes. »

— your engine, after twenty games

Red Pen Chess is a chess school with one rule: everything gets marked. Stockfish reads your last 20 rated games, writes up the leaks, then turns every mistake into a drill. The audit is free. The truth is included.