Chess Auto Prep
Tools for serious preparation. Explore positions, train from your games, and follow the latest chess.
TWIC Alerts
Get an email when The Week in Chess publishes games that reach your positions, feature your players, or open with your ECO codes.
Set up an alert
Tactics Trainer
Puzzles from your own Lichess and Chess.com games. Stockfish runs in your browser and finds the moves you missed.
Start training
Bughouse Lab
Two boards, one team. Explore moves, drops and sitting with Hivemind, the bughouse engine. No app download needed.
Explore a position
Charles Clock
A blitz clock built for endgames: captures grow a shared increment, so games that reach the endgame have time to play it.
Open the clock