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ECO openings
The 2,018 lines of the Encyclopaedia of Chess Openings (ECO), from A00 to E99. Search by code, name or moves and step through each line on the board.
Data: fsmosca/eco (MIT license), based on the ECO file from pgn-extract.
Keyboard: ← → to step through the moves; Home and End to jump to the start or the end.