Fixed package errors and embedded magics into the build

Chess/README.md

@@ -0,0 +1,8 @@
+# A chess engine written in nim
+
+For now, that's about it.
+
+
+# Installation
+
+Just run `nimble install`

Chess/nimfish.nimble

@@ -4,7 +4,7 @@ version       = "0.1.0"
 author        = "nocturn9x"
 description   = "A chess engine written in nim"
 license       = "Apache-2.0"
-srcDir        = "src"
+srcDir        = "nimfish"
 binDir        = "bin"
 installExt    = @["nim"]
 bin           = @["nimfish"]
@@ -12,7 +12,7 @@ bin           = @["nimfish"]
 
 # Dependencies
 
-requires "nim >= 2.1.1"
+requires "nim >= 2.0"
 requires "jsony >= 1.1.5"
 
 

Chess/nimfish/nimfish.nim

@@ -19,10 +19,12 @@ import std/math
 import std/bitops
 
 
-import src/bitboards
-import src/magics
-import src/pieces
-import src/moves
+import nimfishpkg/bitboards
+import nimfishpkg/magics
+import nimfishpkg/pieces
+import nimfishpkg/moves
+
+export bitboards, magics, pieces, moves
 
 
 type 
@@ -31,8 +33,9 @@ type
 
     Position* = object
         ## A chess position
-        # Did the rooks on either side or the king move?
-        castlingAvailable: tuple[white, black: tuple[queen, king: bool]]
+        
+        # Castling metadata. Updated on every move
+        castling: array[64, uint8]
         # Number of half-moves that were performed
         # to reach this position starting from the
         # root of the tree
@@ -42,7 +45,7 @@ type
         # Used for the 50-move rule
         halfMoveClock: int8
         # Full move counter. Increments
-        # every 2 ply
+        # every 2 ply (half-moves)
         fullMoveCount: int8
         # En passant target square (see https://en.wikipedia.org/wiki/En_passant)
         enPassantSquare*: Square
@@ -51,13 +54,16 @@ type
         turn: PieceColor
         # Positional bitboards for all pieces
         pieces: tuple[white, black: tuple[king, queens, rooks, bishops, knights, pawns: Bitboard]]
+        # Pinned pieces for each side
+        pins: tuple[white, black: Bitboard]
+        # Checking pieces
+        checkers: tuple[white, black: Bitboard]
         
 
     ChessBoard* = ref object
         ## A chess board object
         
         # The actual board where pieces live
-        # (flattened 8x8 matrix)
         grid: array[64, Piece]
         # The current position
         position: Position
@@ -135,17 +141,17 @@ func getKingStartingSquare(color: PieceColor): Square {.inline.} =
     ## for the given color
     case color:
         of White:
-            return makeSquare(7, 4)
+            return "e1".toSquare()
         of Black:
-            return makeSquare(0, 4)
+            return "e8".toSquare()
         else:
             discard
 
 
-func kingSideRook(color: PieceColor): Square {.inline.} = (if color == White: makeSquare(7, 7) else: makeSquare(0, 7))
-func queenSideRook(color: PieceColor): Square {.inline.} = (if color == White: makeSquare(7, 0) else: makeSquare(0, 0))
-func longCastleKing(color: PieceColor): Square {.inline.} = (if color == White: makeSquare(7, 2) else: makeSquare(0, 5))
-func shortCastleKing(color: PieceColor): Square {.inline.} = (if color == White: makeSquare(7, 6) else: makeSquare(0, 1))
+func kingSideRook(color: PieceColor): Square {.inline.} = (if color == White: "h1".toSquare() else: "h8".toSquare())
+func queenSideRook(color: PieceColor): Square {.inline.} = (if color == White: "a8".toSquare() else: "a1".toSquare())
+func longCastleKing(color: PieceColor): Square {.inline.} = (if color == White: "c1".toSquare() else: "c8".toSquare())
+func shortCastleKing(color: PieceColor): Square {.inline.} = (if color == White: "g1".toSquare() else: "g8".toSquare())
 func longCastleRook(color: PieceColor): Square {.inline.} = (if color == White: makeSquare(7, 3) else: makeSquare(7, 5))
 func shortCastleRook(color: PieceColor): Square {.inline.} = (if color == White: makeSquare(0, 0) else: makeSquare(0, 2))
 
@@ -315,19 +321,21 @@ proc newChessboardFromFEN*(fen: string): ChessBoard =
             of 2:
                 # Castling availability
                 case c:
+                    # TODO
                     of '-':
-                        # Neither side can castle anywhere: do nothing,
-                        # as the castling metadata is set to this state
-                        # by default
                         discard
                     of 'K':
-                        result.position.castlingAvailable.white.king = true
+                        discard
+                        # result.position.castlingAvailable.white.king = true
                     of 'Q':
-                        result.position.castlingAvailable.white.queen = true
+                        discard
+                        # result.position.castlingAvailable.white.queen = true
                     of 'k':
-                        result.position.castlingAvailable.black.king = true
+                        discard
+                        # result.position.castlingAvailable.black.king = true
                     of 'q':
-                        result.position.castlingAvailable.black.queen = true
+                        discard
+                        # result.position.castlingAvailable.black.queen = true
                     else:
                         raise newException(ValueError, &"invalid FEN: unknown symbol '{c}' found in castling availability section")
             of 3:
@@ -1123,7 +1131,7 @@ proc doMove(self: ChessBoard, move: Move) =
     var 
         halfMoveClock = self.position.halfMoveClock
         fullMoveCount = self.position.fullMoveCount
-        castlingAvailable = self.position.castlingAvailable
+        castling = self.position.castling
         enPassantTarget = nullSquare()
     # Needed to detect draw by the 50 move rule
     if piece.kind == Pawn or move.isCapture() or move.isEnPassant():
@@ -1159,46 +1167,14 @@ proc doMove(self: ChessBoard, move: Move) =
         #     else:
         #         discard
     # Has a rook been captured?
-    if move.isCapture():
-        let captured = self.grid[move.targetSquare]
-        if captured.kind == Rook:
-            case captured.color:
-                of White:
-                    if move.targetSquare == captured.color.queenSideRook():
-                        # Queen side
-                        castlingAvailable.white.queen = false
-                    elif move.targetSquare == captured.color.kingSideRook():
-                        # King side
-                        castlingAvailable.white.king = false
-                of Black:
-                    if move.targetSquare == captured.color.queenSideRook():
-                        # Queen side
-                        castlingAvailable.black.queen = false
-                    elif move.targetSquare == captured.color.kingSideRook():
-                        # King side
-                        castlingAvailable.black.king = false
-                else:
-                    # Unreachable
-                    discard
-    # Has the king moved?
-    if piece.kind == King or move.isCastling():
-        # Revoke all castling rights for the moving king
-        case piece.color:
-            of White:
-                castlingAvailable.white.king = false
-                castlingAvailable.white.queen = false
-            of Black:
-                castlingAvailable.black.king = false
-                castlingAvailable.black.queen = false
-            else:
-                discard
+
 
     # Create new position
     self.position = Position(plyFromRoot: self.position.plyFromRoot + 1,
                              halfMoveClock: halfMoveClock,
                              fullMoveCount: fullMoveCount,
                              turn: self.getSideToMove().opposite,
-                             castlingAvailable: castlingAvailable,
+                             castling: castling,
                              enPassantSquare: enPassantTarget,
                              pieces: self.position.pieces
                             )
@@ -1436,19 +1412,20 @@ proc toFEN*(self: ChessBoard): string =
     result &= (if self.getSideToMove() == White: "w" else: "b")
     result &= " "
     # Castling availability
-    let castleWhite = self.position.castlingAvailable.white
-    let castleBlack = self.position.castlingAvailable.black
-    if not (castleBlack.king or castleBlack.queen or castleWhite.king or castleWhite.queen):
-        result &= "-"
-    else:
-        if castleWhite.king:
-            result &= "K"
-        if castleWhite.queen:
-            result &= "Q"
-        if castleBlack.king:
-            result &= "k"
-        if castleBlack.queen:
-            result &= "q"
+    result &= "-"
+    # let castleWhite = self.position.castlingAvailable.white
+    # let castleBlack = self.position.castlingAvailable.black
+    # if not (castleBlack.king or castleBlack.queen or castleWhite.king or castleWhite.queen):
+    #     result &= "-"
+    # else:
+    #     if castleWhite.king:
+    #         result &= "K"
+    #     if castleWhite.queen:
+    #         result &= "Q"
+    #     if castleBlack.king:
+    #         result &= "k"
+    #     if castleBlack.queen:
+    #         result &= "q"
     result &= " "
     # En passant target
     if self.getEnPassantTarget() == nullSquare():

Chess/nimfish/nimfishpkg/magics.nim

@@ -332,19 +332,23 @@ when isMainModule:
     let
         magicsJson = magics.toJSON()
         movesJson = moves.toJSON()
-    var path = joinPath(getCurrentDir(), "src/resources")
-    if path.lastPathPart() == "nimfish":
-        path = joinPath("src", path)
+    var currentFile = currentSourcePath()
+    var path = joinPath(currentFile.parentDir(), "resources")
     writeFile(joinPath(path, "magics.json"), magicsJson)
     writeFile(joinPath(path, "movesets.json"), movesJson)
     echo &"Dumped data to disk (approx. {round(((len(movesJson) + len(magicsJson)) / 1024) / 1024, 2)} MiB)"
 else:
-    var path = joinPath(getCurrentDir(), "src/resources")
-    if path.lastPathPart() == "nimfish":
-        path = joinPath("src", path)
+    func buildPath: string {.compileTime.} =
+        result = currentSourcePath()
+        result = joinPath(result.parentDir(), "resources")
+    
+    const path = buildPath()
     echo "Loading magic bitboards"
-    var magics = readFile(joinPath(path, "magics.json")).fromJson(TableRef[string, array[64, MagicEntry]])
-    var moves = readFile(joinPath(path, "movesets.json")).fromJson(TableRef[string, array[64, seq[Bitboard]]])
+    const 
+        magicFile = staticRead(joinPath(path, "magics.json"))
+        movesFile = staticRead(joinPath(path, "movesets.json"))
+    var magics = magicFile.fromJson(TableRef[string, array[64, MagicEntry]])
+    var moves = movesFile.fromJson(TableRef[string, array[64, seq[Bitboard]]])
     ROOK_MAGICS = magics["rooks"]
     BISHOP_MAGICS = magics["bishops"]
     ROOK_MOVES = moves["rooks"]