The Library

Openings, repertoires, and how club players actually lose

Short reads at three depths — why a repertoire should come from your own games, how to choose what to prepare, and the concrete openings — with the numbers behind each claim.

Browse the 62 opening pages →

The first articles are being written. Meanwhile, every opening has a page.

Try it on your games

Which opening moves keep costing you?

Enter a chess.com or Lichess username — free, no account — and Stockfish shows the three opening moves you repeat that cost you most, each with a stronger move.

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