🌳 Opening Explorer
Turn any account's games — yours, or an opponent's before you play them — into a branching opening tree: see how often each move gets played and how it actually scores from there.
1 Sources
2 Color
Building the tree for — — the player who appears most across the loaded games.
ColorOnly games where the player had this color are walked into the tree.
Moves from here
🔎 Engine analysis
Games reaching this position
📚 Book theory (Lichess)
Connect your Lichess account to see aggregate stats from millions of Lichess games at this exact position, alongside your own repertoire above. Lichess requires being signed in to use this — nothing else about your account is accessed.
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🎓 Drill your repertoire
Quizzes you only on your own turn, at positions from the tree above where you've actually played a move — never on your opponent's replies. Uses spaced repetition: answer correctly and a position comes back less often; miss it and it comes back sooner. Progress is saved in this browser, per player and color.