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kokopu

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A JavaScript/TypeScript library implementing the chess game rules and providing tools to read/write the standard chess file formats.

www.npmjs.com/package/kokopu

yo35/kokopu

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Event = {Game with long/short comment descriptors} [start] -+<LONG {Empty line after first comment of variation => LONG.}<LONG [1w] (1w) e4 (#hm=0) [1b] (1b) e5 (#hm=0) | [1b-v0-start] +---+ {Within short variation, always SHORT.} [1b-v0-1b] | (1b) e6 (#hm=0) $18 {Within short variation, always SHORT.} | [2w] (2w) Nf3 (#hm=1) [2b] (2b) Nc6 (#hm=2) [3w] (3w) Bb5 (#hm=3) | [3w-v0-start] +---+<LONG {No empty line after => SHORT.} [3w-v0-3w] | (3w) Bc4 (#hm=3) [3w-v0-3b] | (3b) Bc5 (#hm=4) {No empty line before => SHORT.} | [3b] (3b) a6 (#hm=0) [4w] (4w) Bxc6 (#hm=0) | [4w-v0-start] +---+<LONG {Empty line after first comment of variation => LONG.}<LONG [4w-v0-4w] | (4w) Ba4 (#hm=1) [4w-v0-4b] | (4b) b5 (#hm=0) {Empty line before comment => LONG.}<LONG | [4b] (4b) dxc6 (#hm=0) +---+---+---+---+---+---+---+---+ | r | | b | q | k | b | n | r | +---+---+---+---+---+---+---+---+ | | p | p | | | p | p | p | +---+---+---+---+---+---+---+---+ | p | | p | | | | | | +---+---+---+---+---+---+---+---+ | | | | | p | | | | +---+---+---+---+---+---+---+---+ | | | | | P | | | | +---+---+---+---+---+---+---+---+ | | | | | | N | | | +---+---+---+---+---+---+---+---+ | P | P | P | P | | P | P | P | +---+---+---+---+---+---+---+---+ | R | N | B | Q | K | | | R | +---+---+---+---+---+---+---+---+ w KQkq - {Draw}{8 plies}