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Diffstat (limited to 'grammars/chess.gbnf')
| -rw-r--r-- | grammars/chess.gbnf | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/grammars/chess.gbnf b/grammars/chess.gbnf new file mode 100644 index 0000000..ef0fc1b --- /dev/null +++ b/grammars/chess.gbnf @@ -0,0 +1,13 @@ +# Specifies chess moves as a list in algebraic notation, using PGN conventions + +# Force first move to "1. ", then any 1-2 digit number after, relying on model to follow the pattern +root ::= "1. " move " " move "\n" ([1-9] [0-9]? ". " move " " move "\n")+ +move ::= (pawn | nonpawn | castle) [+#]? + +# piece type, optional file/rank, optional capture, dest file & rank +nonpawn ::= [NBKQR] [a-h]? [1-8]? "x"? [a-h] [1-8] + +# optional file & capture, dest file & rank, optional promotion +pawn ::= ([a-h] "x")? [a-h] [1-8] ("=" [NBKQR])? + +castle ::= "O-O" "-O"? |