How to build a chess opening repertoire from your own games
A five-step method to turn the games you already play on Chess.com or Lichess into a small opening repertoire you can actually remember.
Chess opening guides
Short, practical guides on building and remembering an opening repertoire that starts from the games you already play.
How to stop forgetting your chess opening lines
Why opening lines fade a week after you study them, and six habits that make them stick: a smaller repertoire, active recall and spaced repetition.
How to find the move where you left your opening preparation
After a bad opening, the useful question is which move first left your repertoire. How to find it in your Chess.com or Lichess games and what to do next.
ChessBonsai
Type your Chess.com or Lichess username and see your own opening tree. Free beta, no password asked.
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