Feature
Your chess opening tree
An opening tree shows every move you and your opponents have played branching out from the start, with results attached to each node. Audit Chess builds this tree from your own Lichess or Chess.com history, so at every position you can see how many times you reached it and your win, draw and loss rate from there. It turns a vague sense of "I do badly in the French" into an exact branch where your score falls off a cliff. You can walk the tree move by move and find the precise point your repertoire starts leaking points. Free, no account, runs in your browser.
Walk a live opening tree
Click a move on the board or in the list to walk deeper; the breadcrumb takes you back. This is the real tree on a sample player’s games - yours is built from your own history.
Results at every node
Each node carries how often you reached it and your win/draw/loss split from that position, so the tree reads as a map of what is actually working in your repertoire.
Find the branch that leaks points
Walk down a line and watch the win rate. The move where it collapses is the one to study - often a single reply you keep meeting badly, invisible until you see the whole tree.
From tree to preparation
The opening tree is where finding your weaknesses starts: the branch where your win rate falls off a cliff is the exact line to study. You can also point the same tree at an opponent to scout their repertoire before a game. For a step-by-step routine, read chess opening preparation.
Frequently asked questions
Can I build an opening tree from my own games?+
Yes. Audit Chess turns your Lichess and Chess.com history into an interactive opening tree with win/draw/loss stats at every move.
What is a chess opening tree?+
A chess opening tree is a branching map of the moves played from the starting position: each node is a position, and the branches are the replies that have been played from it. When it is built from real games, every node also carries how often it was reached and the win, draw and loss rate from there - so the tree shows not just what is playable but what actually scores.
How is this different from an opening explorer?+
A public opening explorer shows how the whole database plays a position. This opening tree is built from your own games, so the results attached to each move are your results - which is what tells you where your personal repertoire is strong and where it quietly costs you points.
Audit Chess is free and not affiliated with Chess.com or Lichess.