eco-codes

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Free JSON/CSV dataset of 1,506 chess openings covering all 500 ECO codes (A00–E99) — moves, ideas, traps, famous players. CC-BY 4.0.

chess open-data dataset json-dataset chess-openings csv-dataset chess-data chess-training eco-codes

Caissa Codex — a free reference of the 3,690 named chess opening lines, with Lichess statistics (chesscodex.org)

nginx php raspberry-pi chess sqlite self-hosted pgn lichess stockfish chess-openings opening-explorer cloudflare-tunnel chess-training eco-codes

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