The bishop — free interactive chess lesson | ChessMess
Diagonals only, and always on the same colour. Interactive and free, no account needed.
ChessMess is a free chess website. Play 19 human-like bots from 250 to 3200 rating, get move-by-move coaching, solve 100,000 rated puzzles, take 57 interactive lessons, review every game with Stockfish 19 for free and without limits, practise your own mistakes, rehearse against a bot built from any Lichess or Chess.com player's games, and play friends by link, 6-digit code or QR code.
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