Sharpen every phase of your game - puzzles, drills, and trainers based on your reviewed games and the knowledge base.
Browse 3,500+ named openings. Search by name or ECO code, watch each line unfold, and see the reviewed games actually played with it.
3,865 openingsOne puzzle a day, the same for everyone. Three hearts, a hint when you slip, a spoiler-free result to share, and rated practice at the difficulty you choose.
New every dayThe positions where your own games turned, kept so you can find the better move. Each one comes back on its own schedule until it is yours.
From your reviewsSolve as many puzzles as you can in 3 minutes. Puzzles come from your reviewed games and the knowledge base patterns.
772 drills · from real gamesEvery drill with its difficulty rating, the position, the stronger move, and the game it came from - players, ratings, result, and links back to the full review.
772 drills · from real gamesAccuracy trends, mistake patterns, opening win rates, and improvement tracking across all your reviewed games.
Aggregated from all gamesLearn board coordinates by finding squares under time pressure. Essential for reading chess books and improving board vision.
30-second roundsPractice fundamental endgame positions: Lucena, Philidor, opposition, triangulation, and key pawn races.
Essential positionsReal positions from reviewed games - the blunder that was played vs the stronger move. Pick the safe move and see the eval swing.
772 drills · from real gamesThe position shows for 8 seconds, then vanishes. Where was the king? How many pawns? The fastest board-vision training there is.
Memory roundsThe knowledge base as flashcards with SM-2 scheduling - hard principles return sooner, mastered ones fade out. Progress stays in your browser.
124 principlesA small friendly group each week, ranked by what you learn. Opt in whenever you like, leave any time.
OptionalA new theme most weeks, with small quests and a community Game of the Week to vote on.
New every week