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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 tags} [start] -+<LONG [1w] (1w) e4 (#hm=0) [cal = {Ge2e4}] [1b] (1b) h5 (#hm=0) [cal = {Gh7h5}] [csl = {Rh5}] {Odd move: the pawn in h5 is weak.} | [1b-v0-start] +---+ [key = {value}] {More usual is} [1b-v0-1b] | (1b) c5 (#hm=0) | [2w] (2w) d4 (#hm=0) [key = {value2}] {Cannot have several tags with the same key here!} [2b] (2b) a5 (#hm=0) {No tag here.} [3w] (3w) c4 (#hm=0) [key = {value}] {This is a comment.} [3b] (3b) g5 (#hm=0) [key1 = {value1}] [key2 = {value2}] {This is another comment.} [4w] (4w) f4 (#hm=0) [4b] (4b) b5 (#hm=0) [LineSplittedTag = {The value}] +---+---+---+---+---+---+---+---+ | r | n | b | q | k | b | n | r | +---+---+---+---+---+---+---+---+ | | | p | p | p | p | | | +---+---+---+---+---+---+---+---+ | | | | | | | | | +---+---+---+---+---+---+---+---+ | p | p | | | | | p | p | +---+---+---+---+---+---+---+---+ | | | P | P | P | P | | | +---+---+---+---+---+---+---+---+ | | | | | | | | | +---+---+---+---+---+---+---+---+ | P | P | | | | | P | P | +---+---+---+---+---+---+---+---+ | R | N | B | Q | K | B | N | R | +---+---+---+---+---+---+---+---+ w KQkq - {Line}{8 plies}