gearsco.de / starfish
A chess library for Gleam
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Fix move generation for sliding pieces

gearsco.de 7a6db26a 1e331a95

+6 -6
+5 -4
src/starfish/internal/move.gleam
··· 159 159 sliding_moves( 160 160 game, 161 161 position, 162 - sliding_moves_in_direction(game, position, direction, moves), 162 + sliding_moves_in_direction(game, position, position, direction, moves), 163 163 directions, 164 164 ) 165 165 } ··· 167 167 168 168 fn sliding_moves_in_direction( 169 169 game: Game, 170 + start_position: Int, 170 171 position: Int, 171 172 direction: Direction, 172 173 moves: List(Move(Legal)), ··· 174 175 let new_position = direction.in_direction(position, direction) 175 176 case iv.get(game.board, new_position) { 176 177 Ok(board.Empty) -> 177 - sliding_moves_in_direction(game, new_position, direction, [ 178 - Move(from: position, to: new_position), 178 + sliding_moves_in_direction(game, start_position, new_position, direction, [ 179 + Move(from: start_position, to: new_position), 179 180 ..moves 180 181 ]) 181 182 Ok(board.Occupied(colour:, ..)) if colour != game.to_move -> [ 182 - Capture(from: position, to: new_position), 183 + Capture(from: start_position, to: new_position), 183 184 ..moves 184 185 ] 185 186 Ok(board.Occupied(_, _)) | Error(_) -> moves
+1 -2
test/starfish_test.gleam
··· 87 87 use <- Timeout(1_000_000) 88 88 use <- pocket_watch.callback("initial position", print_time) 89 89 perft_all(starfish.starting_fen, [ 90 - 20, 91 - // 400, 8902, 197_281, 4_865_609, 119_060_324, 90 + 20, 400, 8902, 197_281, 4_865_609, 119_060_324, 92 91 ]) 93 92 } 94 93