def sanitizeMove(self, moves, history, whiteKing, whiteQueen, whiteBishop,
whiteKnight, whiteRook, whitePawn, blackKing, blackQueen,
blackBishop, blackKnight, blackRook, blackPawn,
whiteQueenCastle, whiteKingCastle, blackQueenCastle,
blackKingCastle, whiteTurn):
Moves = self.Moves
moves = moves.split()
li = []
for i in range(len(moves)):
currentMove = moves[i]
#white pieces
tempWhiteKing = Moves.makeMove(whiteKing, currentMove, "K")
tempWhiteQueen = Moves.makeMove(whiteQueen, currentMove, "Q")
tempWhiteBishop = Moves.makeMove(whiteBishop, currentMove, "B")
tempWhiteKnight = Moves.makeMove(whiteKnight, currentMove, "H")
tempWhiteRook = Moves.makeMove(whiteRook, currentMove, "R")
tempWhitePawn = Moves.makeMove(whitePawn, currentMove, "P")
#if castling, make castling move
if ("WL" in currentMove or "WR" in currentMove):
tempWhiteKing, tempWhiteRook = Moves.makeCastlingMove(
whiteKing, whiteRook, currentMove)
#black pieces
tempBlackKing = Moves.makeMove(blackKing, currentMove, "k")
tempBlackQueen = Moves.makeMove(blackQueen, currentMove, "q")
tempBlackBishop = Moves.makeMove(blackBishop, currentMove, "b")
tempBlackKnight = Moves.makeMove(blackKnight, currentMove, "h")
tempBlackRook = Moves.makeMove(blackRook, currentMove, "r")
tempBlackPawn = Moves.makeMove(blackPawn, currentMove, "p")
if ("BL" in currentMove or "BR" in currentMove):
tempBlackKing, tempBlackRook = Moves.makeCastlingMove(
blackKing, blackRook, currentMove)
tempHistory = currentMove
if (whiteTurn):
if ((tempWhiteKing & Moves.whiteKing_illegalMoves(
tempWhiteKing, tempWhiteQueen, tempWhiteBishop,
tempWhiteKnight, tempWhiteRook, tempWhitePawn,
tempBlackKing, tempBlackQueen, tempBlackBishop,
tempBlackKnight, tempBlackRook, tempBlackPawn)) == 0):
li.append(currentMove)
elif (not whiteTurn):
if ((tempBlackKing & Moves.blackKing_illegalMoves(
tempWhiteKing, tempWhiteQueen, tempWhiteBishop,
tempWhiteKnight, tempWhiteRook, tempWhitePawn,
tempBlackKing, tempBlackQueen, tempBlackBishop,
tempBlackKnight, tempBlackRook, tempBlackPawn)) == 0):
li.append(currentMove)
return li
def sortMoves(self, moves, history, whiteKing, whiteQueen, whiteBishop,
whiteKnight, whiteRook, whitePawn, blackKing, blackQueen,
blackBishop, blackKnight, blackRook, blackPawn,
whiteQueenCastle, whiteKingCastle, blackQueenCastle,
blackKingCastle, whiteTurn, depth):
Moves = self.Moves
Rating = self.Rating
MoveAndScoreList = []
li = []
for i in range(len(moves)):
currentMove = moves[i]
try:
originalX = int(currentMove[0])
originalY = int(currentMove[1])
newX = int(currentMove[2])
newY = int(currentMove[3])
except (ValueError):
raise ValueError(
"Error in sortMoves: the first four character of currentMove string must be integer."
)
start = (originalX * 8) + originalY
end = (newX * 8) + newY
##make currentMove
#white pieces
tempWhiteKing = Moves.makeMove(whiteKing, currentMove, "K")
tempWhiteQueen = Moves.makeMove(whiteQueen, currentMove, "Q")
tempWhiteBishop = Moves.makeMove(whiteBishop, currentMove, "B")
tempWhiteKnight = Moves.makeMove(whiteKnight, currentMove, "H")
tempWhiteRook = Moves.makeMove(whiteRook, currentMove, "R")
tempWhitePawn = Moves.makeMove(whitePawn, currentMove, "P")
#if castling, make castling move
if ("WL" in currentMove or "WR" in currentMove):
tempWhiteKing, tempWhiteRook = Moves.makeCastlingMove(
whiteKing, whiteRook, currentMove)
#black pieces
tempBlackKing = Moves.makeMove(blackKing, currentMove, "k")
tempBlackQueen = Moves.makeMove(blackQueen, currentMove, "q")
tempBlackBishop = Moves.makeMove(blackBishop, currentMove, "b")
tempBlackKnight = Moves.makeMove(blackKnight, currentMove, "h")
tempBlackRook = Moves.makeMove(blackRook, currentMove, "r")
tempBlackPawn = Moves.makeMove(blackPawn, currentMove, "p")
if ("BL" in currentMove or "BR" in currentMove):
tempBlackKing, tempBlackRook = Moves.makeCastlingMove(
blackKing, blackRook, currentMove)
tempHistory = currentMove
###update castling variables
#copy castling variables from previous
tempWhiteQueenCastle = whiteQueenCastle
tempWhiteKingCastle = whiteKingCastle
tempBlackQueenCastle = blackQueenCastle
tempBlackKingCastle = blackKingCastle
#update castling variable based on the currentMove we made
#if currentMove is making white castling move, we can no longer castle again for white
if ("WL" in currentMove or "WR" in currentMove):
tempWhiteQueenCastle = False
tempWhiteKingCastle = False
#if currentMove is making black castling move, we can no longer castle again for black
elif ("BL" in currentMove or "BR" in currentMove):
tempBlackQueenCastle = False
tempBlackKingCastle = False
else:
#if currentMove is moving whiteKing, white queen and king side castle become False
if (((1 << start) & whiteKing) != 0):
tempWhiteQueenCastle = False
tempWhiteKingCastle = False
#if currentMove is moving blackKing, black queen and king side castle become False
elif (((1 << start) & blackKing) != 0):
tempBlackQueenCastle = False
tempBlackKingCastle = False
#if currentMove is moving white left rook, white queenside castling become False
elif (((1 << start) & whiteRook & (1 << 56)) != 0):
tempWhiteQueenCastle = False
#if currentMove is moving white right rook, white kingside castling become False
elif (((1 << start) & whiteRook & (1 << 63)) != 0):
tempWhiteKingCastle = False
elif (((1 << start) & blackRook & (1 << 0)) != 0):
tempBlackQueenCastle = False
elif (((1 << start) & blackRook & (1 << 7)) != 0):
tempBlackKingCastle = False
currentScore = Rating.quickEvaluate(
tempHistory, tempWhiteKing, tempWhiteQueen, tempWhiteBishop,
tempWhiteKnight, tempWhiteRook, tempWhitePawn, tempBlackKing,
tempBlackQueen, tempBlackBishop, tempBlackKnight,
tempBlackRook, tempBlackPawn, tempWhiteQueenCastle,
tempWhiteKingCastle, tempBlackQueenCastle, tempBlackKingCastle,
depth + 1, self.playerIsWhite)
moveAndScore = MoveAndScore(currentMove, currentScore)
MoveAndScoreList.append(moveAndScore)
#Idea:
#if this is player's turn, we need to return list sorted in descending order. Because player want to choose the most maximum score move.
#If this is opponent's turn, we need to return list sorted in ascending order. Because opponent want to choose the most minimum score move.
#if this is player's turn, sort in descending order
if (self.playerIsWhite == whiteTurn):
MoveAndScoreList.sort(key=self.getScore, reverse=True)
#if this is opponent's turn, sort in ascending order
else:
MoveAndScoreList.sort(key=self.getScore, reverse=False)
for i in range(len(MoveAndScoreList)):
li.append(MoveAndScoreList[i].move)
return li
def updateMove(self, move, gui=False):
Moves = self.Moves
##For debugging
# print("The move you entered is "+move)
if (len(move) < 4):
raise ValueError(
"Error in updateMove: the move entered is not a valid move.")
currentMove = None
for i in range(len(self.currentAllLegalMoves)):
#if player input a move of length 4, this move CANNOT automatically fulfill pawn promotion moves as player needs to choose the piece for promotion
if (move in self.currentAllLegalMoves[i]):
if (len(move) == 4):
if (len(self.currentAllLegalMoves[i]) > 4):
#if this is not a pawn promotion move, and is just castling or en passant move, assign the golden standard move to current move
if (self.currentAllLegalMoves[i][5] != "P"):
currentMove = self.currentAllLegalMoves[i]
#if THIS IS A PAWN PROMOTION MOVE, raise Error since pawn promotion piece is not specified
else:
if (gui == True):
raise PawnPromotionPieceNotDefinedError(
"Error in updateMove: pawn promotion piece is not defined."
)
else:
pass
#if this is not a pawn promotion move, and is just normal move, assign the golden standard move to current move
else:
currentMove = self.currentAllLegalMoves[i]
elif (len(move) > 4):
currentMove = self.currentAllLegalMoves[i]
if (currentMove == None):
raise ValueError(
"Error in updateMove; the move entered is not a valid move.")
try:
originalX = int(currentMove[0])
originalY = int(currentMove[1])
newX = int(currentMove[2])
newY = int(currentMove[3])
except (ValueError):
raise ValueError(
"Error in updateMove: the first four character of move string must be integer."
)
start = (originalX * 8) + originalY
end = (newX * 8) + newY
#white pieces
tempWhiteKing = Moves.makeMove(self.whiteKing, currentMove, "K")
tempWhiteQueen = Moves.makeMove(self.whiteQueen, currentMove, "Q")
tempWhiteBishop = Moves.makeMove(self.whiteBishop, currentMove, "B")
tempWhiteKnight = Moves.makeMove(self.whiteKnight, currentMove, "H")
tempWhiteRook = Moves.makeMove(self.whiteRook, currentMove, "R")
tempWhitePawn = Moves.makeMove(self.whitePawn, currentMove, "P")
#if castling, make castling move
if ("WL" in currentMove or "WR" in currentMove):
tempWhiteKing, tempWhiteRook = Moves.makeCastlingMove(
self.whiteKing, self.whiteRook, currentMove)
#black pieces
tempBlackKing = Moves.makeMove(self.blackKing, currentMove, "k")
tempBlackQueen = Moves.makeMove(self.blackQueen, currentMove, "q")
tempBlackBishop = Moves.makeMove(self.blackBishop, currentMove, "b")
tempBlackKnight = Moves.makeMove(self.blackKnight, currentMove, "h")
tempBlackRook = Moves.makeMove(self.blackRook, currentMove, "r")
tempBlackPawn = Moves.makeMove(self.blackPawn, currentMove, "p")
if ("BL" in currentMove or "BR" in currentMove):
tempBlackKing, tempBlackRook = Moves.makeCastlingMove(
self.blackKing, self.blackRook, currentMove)
tempHistory = currentMove
###update castling variables
#copy castling variables from previous
tempWhiteQueenCastle = self.whiteQueenCastle
tempWhiteKingCastle = self.whiteKingCastle
tempBlackQueenCastle = self.blackQueenCastle
tempBlackKingCastle = self.blackKingCastle
#update castling variable based on the currentMove we made
#if currentMove is making white castling move, we can no longer castle again for white
if ("WL" in currentMove or "WR" in currentMove):
tempWhiteQueenCastle = False
tempWhiteKingCastle = False
#if currentMove is making black castling move, we can no longer castle again for black
elif ("BL" in currentMove or "BR" in currentMove):
tempBlackQueenCastle = False
tempBlackKingCastle = False
else:
#if currentMove is moving whiteKing, white queen and king side castle become False
if (((1 << start) & self.whiteKing) != 0):
tempWhiteQueenCastle = False
tempWhiteKingCastle = False
#if currentMove is moving blackKing, black queen and king side castle become False
elif (((1 << start) & self.blackKing) != 0):
tempBlackQueenCastle = False
tempBlackKingCastle = False
#if currentMove is moving white left rook, white queenside castling become False
elif (((1 << start) & self.whiteRook & (1 << 56)) != 0):
tempWhiteQueenCastle = False
#if currentMove is moving white right rook, white kingside castling become False
elif (((1 << start) & self.whiteRook & (1 << 63)) != 0):
tempWhiteKingCastle = False
elif (((1 << start) & self.blackRook & (1 << 0)) != 0):
tempBlackQueenCastle = False
elif (((1 << start) & self.blackRook & (1 << 7)) != 0):
tempBlackKingCastle = False
#update history
self.history = tempHistory
#update white pieces
self.whiteKing = tempWhiteKing
self.whiteQueen = tempWhiteQueen
self.whiteBishop = tempWhiteBishop
self.whiteKnight = tempWhiteKnight
self.whiteRook = tempWhiteRook
self.whitePawn = tempWhitePawn
#update black pieces
self.blackKing = tempBlackKing
self.blackQueen = tempBlackQueen
self.blackBishop = tempBlackBishop
self.blackKnight = tempBlackKnight
self.blackRook = tempBlackRook
self.blackPawn = tempBlackPawn
#update castling variables
self.whiteQueenCastle = tempWhiteQueenCastle
self.whiteKingCastle = tempWhiteKingCastle
self.blackQueenCastle = tempBlackQueenCastle
self.blackKingCastle = tempBlackKingCastle
#if gui is True, we also need to update our chessBoard (arrays of arrays)
if (gui == True):
self.updateChessBoard()
#if gui is False, we don't need to update our chessBoard (arrays of arrays) since we will call the drawBoard method in chessAI_console
else:
pass
def principalVariationSearch(self, alpha, beta, history, whiteKing,
whiteQueen, whiteBishop, whiteKnight,
whiteRook, whitePawn, blackKing, blackQueen,
blackBishop, blackKnight, blackRook,
blackPawn, whiteQueenCastle, whiteKingCastle,
blackQueenCastle, blackKingCastle, whiteTurn,
depth):
Moves = self.Moves
Rating = self.Rating
#if we reach our max search depth, return the best score for the board at that level
if (depth == self.maxDepth):
bestScore = Rating.evaluate(
history, whiteKing, whiteQueen, whiteBishop, whiteKnight,
whiteRook, whitePawn, blackKing, blackQueen, blackBishop,
blackKnight, blackRook, blackPawn, whiteQueenCastle,
whiteKingCastle, blackQueenCastle, blackKingCastle, depth,
self.playerIsWhite)
return bestScore, "No Move"
if (whiteTurn):
moves = Moves.white_legalMoves(
history, whiteKing, whiteQueen, whiteBishop, whiteKnight,
whiteRook, whitePawn, blackKing, blackQueen, blackBishop,
blackKnight, blackRook, blackPawn, whiteQueenCastle,
whiteKingCastle, blackQueenCastle, blackKingCastle)
else:
moves = Moves.black_legalMoves(
history, whiteKing, whiteQueen, whiteBishop, whiteKnight,
whiteRook, whitePawn, blackKing, blackQueen, blackBishop,
blackKnight, blackRook, blackPawn, whiteQueenCastle,
whiteKingCastle, blackQueenCastle, blackKingCastle)
#get the first legal move for the current player. After the moves have been sorted, we assume that the first move is always the best move.
moves = self.sanitizeMove(moves, history, whiteKing, whiteQueen,
whiteBishop, whiteKnight, whiteRook,
whitePawn, blackKing, blackQueen,
blackBishop, blackKnight, blackRook,
blackPawn, whiteQueenCastle, whiteKingCastle,
blackQueenCastle, blackKingCastle, whiteTurn)
#if no legal move for current player, then it must be checkmate or stalemate
#if this is player's turn, this is really bad. return -5000
#if this is opponent's turn, this is good. we want this. return 5000
#TODO: Check this AND FIX THIS!
if (len(moves) == 0):
if (self.playerIsWhite == whiteTurn):
return -5000, "No Move"
else:
return 5000, "No Move"
moves = self.sortMoves(moves, history, whiteKing, whiteQueen,
whiteBishop, whiteKnight, whiteRook, whitePawn,
blackKing, blackQueen, blackBishop, blackKnight,
blackRook, blackPawn, whiteQueenCastle,
whiteKingCastle, blackQueenCastle,
blackKingCastle, whiteTurn, depth)
firstLegalMoveIndex = 0
b = beta
bestScore = -math.inf
####################################### throughroughly search firstLegalMove
firstLegalMove = moves[firstLegalMoveIndex]
try:
originalX = int(firstLegalMove[0])
originalY = int(firstLegalMove[1])
newX = int(firstLegalMove[2])
newY = int(firstLegalMove[3])
except (ValueError):
raise ValueError(
"Error in principalVariationSearch: the first four character of firstLegalMove string must be integer."
)
start = (originalX * 8) + originalY
end = (newX * 8) + newY
#white pieces
tempWhiteKing = Moves.makeMove(whiteKing, firstLegalMove, "K")
tempWhiteQueen = Moves.makeMove(whiteQueen, firstLegalMove, "Q")
tempWhiteBishop = Moves.makeMove(whiteBishop, firstLegalMove, "B")
tempWhiteKnight = Moves.makeMove(whiteKnight, firstLegalMove, "H")
tempWhiteRook = Moves.makeMove(whiteRook, firstLegalMove, "R")
tempWhitePawn = Moves.makeMove(whitePawn, firstLegalMove, "P")
#if castling, make castling move
if ("WL" in firstLegalMove or "WR" in firstLegalMove):
tempWhiteKing, tempWhiteRook = Moves.makeCastlingMove(
whiteKing, whiteRook, firstLegalMove)
#black pieces
tempBlackKing = Moves.makeMove(blackKing, firstLegalMove, "k")
tempBlackQueen = Moves.makeMove(blackQueen, firstLegalMove, "q")
tempBlackBishop = Moves.makeMove(blackBishop, firstLegalMove, "b")
tempBlackKnight = Moves.makeMove(blackKnight, firstLegalMove, "h")
tempBlackRook = Moves.makeMove(blackRook, firstLegalMove, "r")
tempBlackPawn = Moves.makeMove(blackPawn, firstLegalMove, "p")
if ("BL" in firstLegalMove or "BR" in firstLegalMove):
tempBlackKing, tempBlackRook = Moves.makeCastlingMove(
blackKing, blackRook, firstLegalMove)
tempHistory = firstLegalMove
###update castling variables
#copy castling variables from previous
tempWhiteQueenCastle = whiteQueenCastle
tempWhiteKingCastle = whiteKingCastle
tempBlackQueenCastle = blackQueenCastle
tempBlackKingCastle = blackKingCastle
#update castling variable based on the firstLegalMove we made
#if firstLegalMove is making white castling move, we can no longer castle again for white
if ("WL" in firstLegalMove or "WR" in firstLegalMove):
tempWhiteQueenCastle = False
tempWhiteKingCastle = False
#if firstLegalMove is making black castling move, we can no longer castle again for black
elif ("BL" in firstLegalMove or "BR" in firstLegalMove):
tempBlackQueenCastle = False
tempBlackKingCastle = False
else:
#if firstLegalMove is moving whiteKing, white queen and king side castle become False
if (((1 << start) & whiteKing) != 0):
tempWhiteQueenCastle = False
tempWhiteKingCastle = False
#if firstLegalMove is moving blackKing, black queen and king side castle become False
elif (((1 << start) & blackKing) != 0):
tempBlackQueenCastle = False
tempBlackKingCastle = False
#if firstLegalMove is moving white left rook, white queenside castling become False
elif (((1 << start) & whiteRook & (1 << 56)) != 0):
tempWhiteQueenCastle = False
#if firstLegalMove is moving white right rook, white kingside castling become False
elif (((1 << start) & whiteRook & (1 << 63)) != 0):
tempWhiteKingCastle = False
elif (((1 << start) & blackRook & (1 << 0)) != 0):
tempBlackQueenCastle = False
elif (((1 << start) & blackRook & (1 << 7)) != 0):
tempBlackKingCastle = False
"""
# original algorithm
score,bestMove=-self.principalVariationSearch(-b,-alpha,tempHistory,tempWhiteKing,tempWhiteQueen,tempWhiteBishop,tempWhiteKnight,tempWhiteRook,tempWhitePawn,tempBlackKing,tempBlackQueen,tempBlackBishop,tempBlackKnight,tempBlackRook,tempBlackPawn,tempWhiteQueenCastle,tempWhiteKingCastle,tempBlackQueenCastle,tempBlackKingCastle,not whiteTurn,depth+1)
"""
#Alternate way of writing to original algorithm
score, bestMove = self.principalVariationSearch(
-b, -alpha, tempHistory, tempWhiteKing, tempWhiteQueen,
tempWhiteBishop, tempWhiteKnight, tempWhiteRook, tempWhitePawn,
tempBlackKing, tempBlackQueen, tempBlackBishop, tempBlackKnight,
tempBlackRook, tempBlackPawn, tempWhiteQueenCastle,
tempWhiteKingCastle, tempBlackQueenCastle, tempBlackKingCastle,
not whiteTurn, depth + 1)
score = -score
#In principal variation search, we assume that our first move is the best move, and thus yield the best score.
bestScore = self.max(bestScore, score) #can also write bestScore=score
alpha = self.max(alpha, score)
bestMoveIndex = firstLegalMoveIndex
if (alpha >= beta):
return alpha, moves[bestMoveIndex]
b = alpha + 1
####################################### simply and quickly search through remaining move to confirm our assumption that firstLegalMove is the best move
for i in range(len(moves)):
#if current iteration is firstLegalMoveIndex, skip, since we already thoroughly searched this move.
if (i == firstLegalMoveIndex):
continue
#if current iteration is not firstLegalMoveIndex, simply and quickly search through current move.
currentMove = moves[i]
try:
originalX = int(currentMove[0])
originalY = int(currentMove[1])
newX = int(currentMove[2])
newY = int(currentMove[3])
except (ValueError):
raise ValueError(
"Error in principalVariationSearch: the first four character of currentMove string must be integer."
)
start = (originalX * 8) + originalY
end = (newX * 8) + newY
#white pieces
tempWhiteKing = Moves.makeMove(whiteKing, currentMove, "K")
tempWhiteQueen = Moves.makeMove(whiteQueen, currentMove, "Q")
tempWhiteBishop = Moves.makeMove(whiteBishop, currentMove, "B")
tempWhiteKnight = Moves.makeMove(whiteKnight, currentMove, "H")
tempWhiteRook = Moves.makeMove(whiteRook, currentMove, "R")
tempWhitePawn = Moves.makeMove(whitePawn, currentMove, "P")
#if castling, make castling move
if ("WL" in currentMove or "WR" in currentMove):
tempWhiteKing, tempWhiteRook = Moves.makeCastlingMove(
whiteKing, whiteRook, currentMove)
#black pieces
tempBlackKing = Moves.makeMove(blackKing, currentMove, "k")
tempBlackQueen = Moves.makeMove(blackQueen, currentMove, "q")
tempBlackBishop = Moves.makeMove(blackBishop, currentMove, "b")
tempBlackKnight = Moves.makeMove(blackKnight, currentMove, "h")
tempBlackRook = Moves.makeMove(blackRook, currentMove, "r")
tempBlackPawn = Moves.makeMove(blackPawn, currentMove, "p")
if ("BL" in currentMove or "BR" in currentMove):
tempBlackKing, tempBlackRook = Moves.makeCastlingMove(
blackKing, blackRook, currentMove)
tempHistory = currentMove
###update castling variables
#copy castling variables from previous
tempWhiteQueenCastle = whiteQueenCastle
tempWhiteKingCastle = whiteKingCastle
tempBlackQueenCastle = blackQueenCastle
tempBlackKingCastle = blackKingCastle
#update castling variable based on the currentMove we made
#if currentMove is making white castling move, we can no longer castle again for white
if ("WL" in currentMove or "WR" in currentMove):
tempWhiteQueenCastle = False
tempWhiteKingCastle = False
#if currentMove is making black castling move, we can no longer castle again for black
elif ("BL" in currentMove or "BR" in currentMove):
tempBlackQueenCastle = False
tempBlackKingCastle = False
else:
#if currentMove is moving whiteKing, white queen and king side castle become False
if (((1 << start) & whiteKing) != 0):
tempWhiteQueenCastle = False
tempWhiteKingCastle = False
#if currentMove is moving blackKing, black queen and king side castle become False
elif (((1 << start) & blackKing) != 0):
tempBlackQueenCastle = False
tempBlackKingCastle = False
#if currentMove is moving white left rook, white queenside castling become False
elif (((1 << start) & whiteRook & (1 << 56)) != 0):
tempWhiteQueenCastle = False
#if currentMove is moving white right rook, white kingside castling become False
elif (((1 << start) & whiteRook & (1 << 63)) != 0):
tempWhiteKingCastle = False
elif (((1 << start) & blackRook & (1 << 0)) != 0):
tempBlackQueenCastle = False
elif (((1 << start) & blackRook & (1 << 7)) != 0):
tempBlackKingCastle = False
#TODO: check this!
"""
# original algorithm
score,bestMove=-self.principalVariationSearch(-b,-alpha,tempHistory,tempWhiteKing,tempWhiteQueen,tempWhiteBishop,tempWhiteKnight,tempWhiteRook,tempWhitePawn,tempBlackKing,tempBlackQueen,tempBlackBishop,tempBlackKnight,tempBlackRook,tempBlackPawn,tempWhiteQueenCastle,tempWhiteKingCastle,tempBlackQueenCastle,tempBlackKingCastle,not whiteTurn,depth+1)
"""
#Alternate way of writing to original algorithm
score, bestMove = self.principalVariationSearch(
-b, -alpha, tempHistory, tempWhiteKing, tempWhiteQueen,
tempWhiteBishop, tempWhiteKnight, tempWhiteRook, tempWhitePawn,
tempBlackKing, tempBlackQueen, tempBlackBishop,
tempBlackKnight, tempBlackRook, tempBlackPawn,
tempWhiteQueenCastle, tempWhiteKingCastle,
tempBlackQueenCastle, tempBlackKingCastle, not whiteTurn,
depth + 1)
score = -score
if (score > alpha and score < beta):
"""
# original algorithm
score,bestMove=-self.principalVariationSearch(-beta,-score,tempHistory,tempWhiteKing,tempWhiteQueen,tempWhiteBishop,tempWhiteKnight,tempWhiteRook,tempWhitePawn,tempBlackKing,tempBlackQueen,tempBlackBishop,tempBlackKnight,tempBlackRook,tempBlackPawn,tempWhiteQueenCastle,tempWhiteKingCastle,tempBlackQueenCastle,tempBlackKingCastle,not whiteTurn,depth+1)
"""
#alternate way of writing to original algorithm
score, bestMove = self.principalVariationSearch(
-beta, -score, tempHistory, tempWhiteKing, tempWhiteQueen,
tempWhiteBishop, tempWhiteKnight, tempWhiteRook,
tempWhitePawn, tempBlackKing, tempBlackQueen,
tempBlackBishop, tempBlackKnight, tempBlackRook,
tempBlackPawn, tempWhiteQueenCastle, tempWhiteKingCastle,
tempBlackQueenCastle, tempBlackKingCastle, not whiteTurn,
depth + 1)
score = -score
##For debugging
# print("researched")
if (score > bestScore):
bestMoveIndex = i
bestScore = score
alpha = self.max(alpha, score)
if (alpha >= beta):
return alpha, moves[bestMoveIndex]
b = alpha + 1
return bestScore, moves[bestMoveIndex]
def getAllCurrentLegalMoves(self, whiteTurn):
Moves = self.Moves
if (whiteTurn):
moves = Moves.white_legalMoves(
self.history, self.whiteKing, self.whiteQueen,
self.whiteBishop, self.whiteKnight, self.whiteRook,
self.whitePawn, self.blackKing, self.blackQueen,
self.blackBishop, self.blackKnight, self.blackRook,
self.blackPawn, self.whiteQueenCastle, self.whiteKingCastle,
self.blackQueenCastle, self.blackKingCastle)
else:
moves = Moves.black_legalMoves(
self.history, self.whiteKing, self.whiteQueen,
self.whiteBishop, self.whiteKnight, self.whiteRook,
self.whitePawn, self.blackKing, self.blackQueen,
self.blackBishop, self.blackKnight, self.blackRook,
self.blackPawn, self.whiteQueenCastle, self.whiteKingCastle,
self.blackQueenCastle, self.blackKingCastle)
moves = moves.split()
li = []
for i in range(len(moves)):
currentMove = moves[i]
#white pieces
tempWhiteKing = Moves.makeMove(self.whiteKing, currentMove, "K")
tempWhiteQueen = Moves.makeMove(self.whiteQueen, currentMove, "Q")
tempWhiteBishop = Moves.makeMove(self.whiteBishop, currentMove,
"B")
tempWhiteKnight = Moves.makeMove(self.whiteKnight, currentMove,
"H")
tempWhiteRook = Moves.makeMove(self.whiteRook, currentMove, "R")
tempWhitePawn = Moves.makeMove(self.whitePawn, currentMove, "P")
#if castling, make castling move
if ("WL" in currentMove or "WR" in currentMove):
tempWhiteKing, tempWhiteRook = Moves.makeCastlingMove(
self.whiteKing, self.whiteRook, currentMove)
#black pieces
tempBlackKing = Moves.makeMove(self.blackKing, currentMove, "k")
tempBlackQueen = Moves.makeMove(self.blackQueen, currentMove, "q")
tempBlackBishop = Moves.makeMove(self.blackBishop, currentMove,
"b")
tempBlackKnight = Moves.makeMove(self.blackKnight, currentMove,
"h")
tempBlackRook = Moves.makeMove(self.blackRook, currentMove, "r")
tempBlackPawn = Moves.makeMove(self.blackPawn, currentMove, "p")
if ("BL" in currentMove or "BR" in currentMove):
tempBlackKing, tempBlackRook = Moves.makeCastlingMove(
self.blackKing, self.blackRook, currentMove)
tempHistory = currentMove
if (whiteTurn):
if ((tempWhiteKing & Moves.whiteKing_illegalMoves(
tempWhiteKing, tempWhiteQueen, tempWhiteBishop,
tempWhiteKnight, tempWhiteRook, tempWhitePawn,
tempBlackKing, tempBlackQueen, tempBlackBishop,
tempBlackKnight, tempBlackRook, tempBlackPawn)) == 0):
li.append(currentMove)
elif (not whiteTurn):
if ((tempBlackKing & Moves.blackKing_illegalMoves(
tempWhiteKing, tempWhiteQueen, tempWhiteBishop,
tempWhiteKnight, tempWhiteRook, tempWhitePawn,
tempBlackKing, tempBlackQueen, tempBlackBishop,
tempBlackKnight, tempBlackRook, tempBlackPawn)) == 0):
li.append(currentMove)
self.currentAllLegalMoves = li
