def __init__(self):
"""Create all our pieces in their initial locations"""
self.checked = False
self.mated = False
self.lastMove = None
self.captured = []
self.moveResultResaon = "Success"
self.parsedAlgebraicMoveString = ""
self.lastMoveString = ""
rookFiles = "ah"
knightFiles = "bg"
bishopFiles = "cf"
self.parser = AlgebraicParser()
self.algebraicMoveClass = AlgebraicMove()
self.parsedAlgebraicMoveClass = AlgebraicMove()
self.updateMoveValues = False
self.debug = Debug()
self.pawns = [Pawn(self.color,file+self.color.pawnRank) for file in Util.files]
self.rooks = [Rook(self.color,file+self.color.majorRank) for file in rookFiles]
self.knights = [Knight(self.color,file+self.color.majorRank) for file in knightFiles]
self.bishops = [Bishop(self.color,file+self.color.majorRank) for file in bishopFiles]
self.queens = [Queen(self.color,"d"+self.color.majorRank)]
self.king = King(self.color,"e"+self.color.majorRank)
#This is a lookup table that is primarily used for captures and un-captures
self.pieceMap = { "Pawn" : self.pawns,
"Rook" : self.rooks,
"Knight" : self.knights,
"Bishop" : self.bishops,
"Queen" : self.queens,
"King" : [self.king]}
class Player(object):
"""Base player class"""
def __init__(self):
"""Create all our pieces in their initial locations"""
self.checked = False
self.mated = False
self.lastMove = None
self.captured = []
self.moveResultResaon = "Success"
self.parsedAlgebraicMoveString = ""
self.lastMoveString = ""
rookFiles = "ah"
knightFiles = "bg"
bishopFiles = "cf"
self.parser = AlgebraicParser()
self.algebraicMoveClass = AlgebraicMove()
self.parsedAlgebraicMoveClass = AlgebraicMove()
self.updateMoveValues = False
self.debug = Debug()
self.pawns = [Pawn(self.color,file+self.color.pawnRank) for file in Util.files]
self.rooks = [Rook(self.color,file+self.color.majorRank) for file in rookFiles]
self.knights = [Knight(self.color,file+self.color.majorRank) for file in knightFiles]
self.bishops = [Bishop(self.color,file+self.color.majorRank) for file in bishopFiles]
self.queens = [Queen(self.color,"d"+self.color.majorRank)]
self.king = King(self.color,"e"+self.color.majorRank)
#This is a lookup table that is primarily used for captures and un-captures
self.pieceMap = { "Pawn" : self.pawns,
"Rook" : self.rooks,
"Knight" : self.knights,
"Bishop" : self.bishops,
"Queen" : self.queens,
"King" : [self.king]}
def setOpponent(self, player):
self.otherPlayer = player
def enableDebug(self, debugEnabled):
self.debug.enableDebug(debugEnabled)
def setDebugFileName(self, debugFileName):
self.debug.setOutputFileName(debugFileName)
def getAllPieces(self):
"""Return an array of all of my current pieces"""
return self.pawns + self.rooks + self.knights + self.bishops + self.queens + [self.king]
def mateCheck(self):
mated = False
if self.mated or self.otherPlayer.mated:
self.moveResultReason = "The game is over."
mated = True
return mated
def generatedAlgebraicMoveIsEqualToGiven(self):
return self.parsedAlgebraicMoveClass == self.algebraicMoveClass
def move(self, startCoord, endCoord, promotion=""):
"""Attempt to make a move and return whether the move was possible or not, if this returns false
the reason for the failure will be in my moveResultReason member"""
self.debug.startSection("move")
self.debug.dprint("Two coordinate move attempted.")
self.lastMoveString = ""
if self.mateCheck():
self.debug.dprint("Checkmate detected, game over.")
return False
self.updateMoveValues = True
moveValid = self._movePiece(startCoord, endCoord, promotion)
if moveValid:
self.debug.dprint("Checking for check and checkmate.")
self._postMoveChecks()
self.algebraicMoveClass.valid = True
self.parser.setAlgebraicMove(self.algebraicMoveClass)
self.debug.dprint("Output Algebraic move class:\n", self.algebraicMoveClass)
self.lastMoveString = self.parser.getAlgebraicMoveString()
self.debug.dprint("Algebraic move string:", self.lastMoveString)
self.debug.endSection()
return moveValid
def algebraicMove(self, move):
"""Take in a string in algebraic notation and attempt that move"""
self.debug.startSection("algebraicMove")
self.debug.dprint("Algebraic move attempted.")
self.lastMoveString = ""
if self.mateCheck():
self.debug.dprint("Checkmate detected, game over.")
return False
moveValid = False
self.parser.setAlgebraicMove(move)
self.debug.dprint("Incoming Algebraic move string: ", move)
if self.parser.valid == True:
algebraicMove = self.parser.getAlgebraicMoveClass()
#Save off this move class, we can use it as a comparison after the move
self.parsedAlgebraicMoveClass = algebraicMove
self.parsedAlgebraicMoveString = self.parser.getAlgebraicMoveString()
self.debug.dprint("Parsed Algebraic move class:\n", self.parsedAlgebraicMoveClass)
if algebraicMove.castle:
promotionPiece = ""
currentPieceLocation = self.king.position
if algebraicMove.kingside:
pieceDestination = self.color.kingsideKingFile + self.color.majorRank
else:
pieceDestination = self.color.queensideKingFile + self.color.majorRank
else:
potentialPieces = self.getPiecesThatCanMoveToLocation(algebraicMove.piece, algebraicMove.destination, algebraicMove.disambiguation)
self.debug.dprint("Pieces that can move: ", potentialPieces)
if len(potentialPieces) == 0:
self.moveResultReason = "No pieces of that type may move to the selected location"
self.debug.endSection()
return moveValid
elif len(potentialPieces) > 1:
self.moveResultReason = "More than one piece may move based upon your selection"
self.debug.endSection()
return moveValid
else:
currentPieceLocation = potentialPieces[0].position
pieceDestination = algebraicMove.destination
promotionPiece = algebraicMove.promotion
self.updateMoveValues = True
moveValid = self._movePiece(currentPieceLocation, pieceDestination, promotionPiece)
if moveValid:
self.debug.dprint("Checking for check and checkmate.")
self._postMoveChecks()
self.algebraicMoveClass.valid = True
self.parser.setAlgebraicMove(self.algebraicMoveClass)
self.debug.dprint("Output Algebraic move class:\n", self.algebraicMoveClass)
self.lastMoveString = self.parser.getAlgebraicMoveString()
self.debug.dprint("Algebraic move string:", self.lastMoveString)
self.debug.endSection()
return moveValid
else:
self.debug.dprint("Invalid Algebraic move string.")
self.moveResultReason = "Invalid algebraic notation given."
self.debug.endSection()
return False
def getPiecesThatCanMoveToLocation(self, pieceType, location, disambiguation):
"""Return a list of my pieces that can move to given location, filtered by disambiguation"""
self.debug.startSection("getPiecesThatCanMoveToLocation")
self.debug.dprint("Finding piece to move.")
def canPieceMoveToLocation(piece):
moves = self.getValidMovesForPiece(piece)
self.debug.dprint("Piece and it's moves:", piece.position, moves)
result = True
if (location not in moves):
self.debug.dprint("Piece disqualified due to lack of ability to move.")
result = False
if disambiguation != "" and disambiguation not in piece.position:
self.debug.dprint("Piece disqualified due to disambiguation.")
result = False
return result
pieceList = list(filter(canPieceMoveToLocation, self.pieceMap[pieceType]))
self.debug.endSection()
return pieceList
def getValidMovesForPieceAtCoord(self, coord):
"""Return a map of available moves for the piece at the coordinate, move mapped to move type"""
self.debug.startSection("getValidMovesForPieceAtCoord")
validMap = {}
piece = getMyPieceAtLocation(coord)
if piece:
self.debug.dprint("Found piece for getting valid moves.")
validMap = self.getValidMovesForPiece(piece)
self.debug.endSection()
return validMap
def getValidMovesForPiece(self, piece):
"""Return a map of available moves for the piece, move mapped to move type"""
self.debug.startSection("getValidMovesForPiece")
self.debug.dprint("Get valid moves for: ", piece.position)
validMap = {}
vBoard = VerifyBoard(self.getAllPieces() + self.otherPlayer.getAllPieces())
if piece and piece.color == self.color:
validList = piece.getValidMoves(vBoard)
self.debug.dprint("Valid moves from Piece: ", validList)
for move in validList:
validMap[move] = []
if self._enemyPieceIsAtLocation(move, vBoard):
self.debug.dprint("Set move as capture:", move)
validMap[move].append(Util.MoveType.CAPTURE)
else:
validMap[move].append(Util.MoveType.NORMAL)
#En Passant and promotion checking for Pawns
if type(piece) == Pawn:
self.debug.dprint("Pawn Specials.")
capturables = piece.getCaptureCoords()
for move in capturables:
if move not in validMap and self.canPawnCaptureEnPassantAtCoord(piece, move):
if move not in validMap:
self.debug.dprint("Adding new move for pawn for En Passant: ", move)
validMap[move] = [];
validMap[move].append(Util.MoveType.CAPTURE);
self.debug.dprint("Set move as En Passant: ", move)
validMap[move].append(Util.MoveType.EN_PASSANT)
for move in validMap:
if self.color.promotionRank in move:
self.debug.dprint("Set move as Promotion: ", move)
validMap[move].append(Util.MoveType.PROMOTION)
#Now check for Castle Moves
elif type(piece) == King:
self.debug.dprint("King Specials.")
if not piece.moved and not self.checked:
if self.kingsideCastleIsValid(piece):
move = self.color.kingsideKingFile + self.color.majorRank
self.debug.dprint("Set move as Kingside Castle: ", move)
validMap[move] = []
validMap[move].append(Util.MoveType.KINGSIDECASTLE)
if self.queensideCastleIsValid(piece):
move = self.color.queensideKingFile + self.color.majorRank
self.debug.dprint("Set move as Queenside Castle: ", move)
validMap[move] = []
validMap[move].append(Util.MoveType.QUEENSIDECASTLE)
self.debug.endSection()
return validMap
def kingsideCastleIsValid(self, king):
castleDirection = Util.Castle.KINGSIDE
return self.castleIsValid(king, castleDirection)
def queensideCastleIsValid(self, king):
castleDirection = Util.Castle.QUEENSIDE
return self.castleIsValid(king, castleDirection)
def castleIsValid(self, king, direction):
self.debug.startSection("castleIsValid")
self.debug.dprint("Checking "+direction+".")
result = False
rook = self.findCastlingRook(direction)
if rook != None:
self.debug.dprint("Found "+direction+" Rook.")
if not rook.moved:
self.debug.dprint(direction+" rook has not moved.")
#Get the files for the squares between
files = ""
if direction == Util.Castle.QUEENSIDE:
files = Util.files[Util.files.index(rook.position[0])+1:Util.files.index(king.position[0])]
elif direction == Util.Castle.KINGSIDE:
files = Util.files[Util.files.index(king.position[0])+1:Util.files.index(rook.position[0])]
self.debug.dprint("Files to check for pieces: ", files)
vBoard = VerifyBoard(self.getAllPieces() + self.otherPlayer.getAllPieces())
if not any(None != vBoard.getPiece(file + self.color.majorRank) for file in files):
self.debug.dprint("No pieces found in the way.")
#A quirk of QUEENSIDE is that we do not need to check for file b, so get rid of it
if direction == Util.Castle.QUEENSIDE:
files = files[files.index(self.color.queensideKingFile)-1:]
#Assume we make it unless we find otherwise at this point
result = True
for file in files:
nextMove = file+king.position[1]
king.move(nextMove)
self.debug.dprint(self.color, "Player transferring control to other player to get pieces that can attack our King at: ", self.king.position)
if len(self.otherPlayer.getPiecesThatThreatenLocation(king.position)) != 0:
self.debug.dprint("Check found attempting to verify castle at:", nextMove)
king.undoLastMove()
result = False
break;
king.undoLastMove()
self.debug.endSection()
return result
def findCastlingRook(self, castleDirection):
foundRook = None
for rook in self.rooks:
if rook.castleOption == castleDirection:
foundRook = rook
break
return foundRook
def clearEnPassant(self):
"""The opponent has just made a move, if we still have EnPassant vulnerable Pawns they are not anymore"""
[pawn.clearEnPassantVunerable() for pawn in self.pawns if pawn.isEnPassantVulnerable()]
def canPawnCaptureEnPassantAtCoord(self, pawn, coord):
"""Determine if the destination coordinate is an En Passant capture for the given pawn"""
if type(pawn) == Pawn:
possibleEnemyPosition = coord[0] + pawn.position[1]
vBoard = VerifyBoard(self.getAllPieces() + self.otherPlayer.getAllPieces())
enemyPiece = vBoard.getPiece(possibleEnemyPosition)
if type(enemyPiece) == Pawn and enemyPiece.color != pawn.color:
if enemyPiece.isEnPassantVulnerable():
return True
else:
return False
else:
return False
return False
def _generateLocator(self,coord):
"""Returns a function that only accepts pieces that are at the specificed coordinate"""
return lambda piece: piece.position == coord
def getMyPieceAtLocation(self, coord):
"""This returns my piece at the given location or None if I don't have a piece there"""
return VerifyBoard(self.getAllPieces()).getPiece(coord)
def _enemyPieceIsAtLocation(self,coord, vBoard):
"""This checks to see if there is an enemy piece at the position given"""
result = False
otherPiece = vBoard.getPiece(coord)
if otherPiece != None and otherPiece.color != self.color:
result = True
return result
def _movePiece(self, startCoord, endCoord, promotionPieceStr=""):
"""This checks a number of things, it makes sure that we do have a piece at the start location, it makes sure that the requested
end location is in the physical move set of the peice, it captures an opponent piece at the end location if necessary, and it
makes sure that the requested move does not expose or leave our king in check. If any of these problem areas arise, it leaves both
players in their initial state."""
self.debug.startSection("_movePiece")
if self.updateMoveValues:
self.algebraicMoveClass = AlgebraicMove()
self.algebraicMoveClass.valid = False
moveClass = self.algebraicMoveClass
currPieces = filter(self._generateLocator(startCoord), self.getAllPieces())
self.moveResultReason = "Success"
previousCheckStatus = self.checked
for piece in currPieces:
self.debug.dprint("Found piece at location: ", piece)
#This is a little weird at first glance
#It is possible that filter could return more than one piece
#so what we do is we move the first one found
self.generateMovePiece(piece)
validMoves = self.getValidMovesForPiece(piece)
self.debug.dprint("Valid moves for piece: ", validMoves)
if endCoord in validMoves:
self.generateDisambiguation(piece, endCoord)
self.generateDestination(endCoord)
capturePiece = None
promotionPiece = None
castledRook = None
if Util.MoveType.EN_PASSANT in validMoves[endCoord]:
#We know that this is a pawn now
self.debug.dprint("En Passant Capture move.")
self.generateCapture(piece, True)
capturePiece = self.capture(endCoord[0]+piece.position[1])
self.debug.dprint("En Passant Captured piece: ", capturePiece)
elif Util.MoveType.CAPTURE in validMoves[endCoord]:
self.debug.dprint("Capture move.")
self.generateCapture(piece, True)
capturePiece = self.capture(endCoord)
self.debug.dprint("Captured piece: ", capturePiece)
elif Util.MoveType.KINGSIDECASTLE in validMoves[endCoord]:
self.debug.dprint("Kingside Castle move.")
self.generateCastle(Util.Castle.KINGSIDE)
castledRook = self.findCastlingRook(Util.Castle.KINGSIDE)
castledRook.move(self.color.kingsideRookMoveFile+self.color.majorRank)
elif Util.MoveType.QUEENSIDECASTLE in validMoves[endCoord]:
self.debug.dprint("Queenside Castle move.")
self.generateCastle(Util.Castle.QUEENSIDE)
castledRook = self.findCastlingRook(Util.Castle.QUEENSIDE)
castledRook.move(self.color.queensideRookMoveFile+self.color.majorRank)
piece.move(endCoord)
self.moveResultReason = piece.moveResultReason
#Go ahead and set the last move, minus any promotion piece, so that we can do an undo if promotion falls through
self.lastMove = PlayerLastMove(piece, pieceCaptured = capturePiece, rookCastled = castledRook)
if Util.MoveType.PROMOTION in validMoves[endCoord]:
if promotionPieceStr not in Util.pieces or promotionPieceStr == "Pawn" or promotionPieceStr == "King":
self.debug.dprint("Invalid promotion move.")
self.undoLastMove()
self.moveResultReason = "No valid piece given to promote to."
self.debug.endSection()
return False
self.debug.dprint("Valid promotion move.")
self.generatePromotion(promotionPieceStr)
promotionPiece = globals()[promotionPieceStr](self.color, endCoord)
self.debug.dprint("Pawn: ", id(piece))
pieceList = self.pieceMap[piece.piece]
pieceList.remove(piece)
self.debug.dprint("Pawn list: ", getIds(pieceList))
self.debug.dprint("Promotion piece: ", promotionPieceStr, id(promotionPiece))
promotionPieceList = self.pieceMap[promotionPiece.piece]
promotionPieceList.append(promotionPiece)
self.debug.dprint("Promotion piece list: ", getIds(promotionPieceList))
self.lastMove = PlayerLastMove(piece, pieceCaptured = capturePiece, piecePromoted = promotionPiece, rookCastled = castledRook)
self.debug.dprint("Last Move: ", self.lastMove)
if self.verifyCheck():
self.debug.dprint("That move placed us in check.")
self.undoLastMove()
if previousCheckStatus:
self.moveResultReason = "That move does not resolve the check!"
else:
self.moveResultReason = "That move results in check!"
self.debug.endSection()
return False
self.debug.endSection()
return True
else:
self.moveResultReason = "The end square is not in the valid move range of this piece."
pass
self.debug.endSection()
return False
self.moveResultReason = "No piece found at that start square."
self.debug.endSection()
return False
def _testMove(self, startCoord, endCoord):
"""We are just testing to see if a move is valid, we do not care if it affects the other player,
and we want it to have no lasting impact on the board"""
self.debug.startSection("_testMove")
savedSetting = self.updateMoveValues
self.updateMoveValues = False
self.debug.dprint("Disabling algebraic move generation")
testMoveValid = self._movePiece(startCoord, endCoord)
if testMoveValid:
self.debug.dprint("Move succeeded, undoing.")
self.undoLastMove()
self.updateMoveValues = savedSetting
self.debug.dprint("Algebraic move generation restored to: ", self.updateMoveValues)
self.debug.endSection()
return testMoveValid
def _postMoveChecks(self):
"""Run and checks after a move is completed successfully"""
self.debug.startSection("_postMoveChecks")
self.debug.dprint(self.color, "Player Post move checking, transfer control to other player to check and see if they are checked or mated.")
self.otherPlayer.verifyCheck()
self.otherPlayer.verifyMate()
self.generateCheckMate(self.otherPlayer.checked, self.otherPlayer.mated)
self.debug.dprint(self.color, "Player Post move checking, transfer control to other player to clear EnPassant Vulnerable Pawns.")
self.otherPlayer.clearEnPassant()
self.debug.endSection()
def generateDisambiguation(self, piece, destination):
"""If required, based upon instance variable, generate the disambiguation string"""
if self.updateMoveValues:
#We need the file if that works, the rank if the file does not, and both if neither is sufficient
pieces = self.getPiecesThatCanMoveToLocation(piece.piece, destination, "")
pieces.remove(piece)
if len(pieces) > 0:
fileAndRank = piece.position
otherPositions = []
for otherPiece in pieces:
otherPositions.append(otherPiece.position)
if any(fileAndRank[0] not in position for position in otherPositions):
self.algebraicMoveClass.disambiguation = fileAndRank[0]
elif any(fileAndRank[1] not in position for position in otherPositions):
self.algebraicMoveClass.disambiguation = fileAndRank[1]
else:
self.algebraicMoveClass.disambiguation = piece.position
else:
#This is the only piece that can move here, no disambiguation needed
self.algebraicMoveClass.disambiguation = ""
def generateMovePiece(self, piece):
"""If required, generate the piece string for the piece to be moved"""
if self.updateMoveValues:
self.algebraicMoveClass.piece = piece.piece
def generateDestination(self, coord):
"""If required, generate the destination coordinate for the move"""
if self.updateMoveValues:
self.algebraicMoveClass.destination = coord
def generateCapture(self, piece, captureHappened):
"""If required, generate the capture status for the move"""
if self.updateMoveValues:
self.algebraicMoveClass.capture = captureHappened
if captureHappened and type(piece) == Pawn:
#Pawns need to specify their file as disambiguation when capturing
self.algebraicMoveClass.disambiguation = piece.position[0]
def generateCheckMate(self, checkStatus, mateStatus):
"""If required, generate the check and mate status for the move"""
if self.updateMoveValues:
self.algebraicMoveClass.check = checkStatus
self.algebraicMoveClass.mate = mateStatus
def generatePromotion(self, promotion):
"""If required, generate the promotion piece for the move"""
if self.updateMoveValues:
if promotion in Util.pieces:
self.algebraicMoveClass.promotion = promotion
elif promotion in Util.invPieces:
self.algebraicMoveClass.promotion = Util.invPieces[promotion]
else:
self.algebraicMoveClass.promotion = ""
def generateCastle(self, direction):
if self.updateMoveValues:
self.algebraicMoveClass.castle = True
self.algebraicMoveClass.kingside = direction == Util.Castle.KINGSIDE
def undoLastMove(self):
"""Undo the previous move"""
self.debug.startSection("undoLastMove")
if self.lastMove != None:
self.debug.dprint("Valid last move to undo detected: ", self.lastMove)
self.lastMove.pieceMoved.undoLastMove()
if self.lastMove.pieceCaptured != None:
self.captured.remove(self.lastMove.pieceCaptured)
self.otherPlayer.returnPiece(self.lastMove.pieceCaptured)
if self.lastMove.piecePromoted != None:
#We are undoing a promotion, special things need to happen
pieceList = self.pieceMap[self.lastMove.pieceMoved.piece]
pieceList.append(self.lastMove.pieceMoved)
promotionPieceList = self.pieceMap[self.lastMove.piecePromoted.piece]
promotionPieceList.remove(self.lastMove.piecePromoted)
if self.lastMove.rookCastled != None:
self.lastMove.rookCastled.undoLastMove()
self.lastMove = None
#It is almost guaranteed that we could undo back into a check position. Because of that, run
#the verify to update our state properly
self.verifyCheck()
self.debug.dprint("Verifying/setting check status after undo: ", self.checked)
self.debug.endSection()
return True
self.debug.endSection()
return False
def capture(self, coord):
"""Capture the piece from the other player at the given coordinate"""
self.debug.startSection("capture")
vBoard = VerifyBoard(self.getAllPieces()+self.otherPlayer.getAllPieces())
capturePiece = vBoard.getPiece(coord)
self.debug.dprint("Piece to capture: ", id(capturePiece))
self.debug.dprint(self.color, "Player transferring control to other to get captured piece")
self.otherPlayer.giveCapturedPiece(capturePiece)
self.captured.append(capturePiece)
self.debug.dprint("New capture list: ", getIds(self.captured))
self.debug.endSection()
return capturePiece
def giveCapturedPiece(self, piece):
"""Remove the selected piece from our list and return it"""
self.debug.startSection("capture")
#I cannot simply use the all pieces API because that returns a new list
# and I need to get these pieces where they live
pieceList = self.pieceMap[piece.piece]
self.debug.dprint("Piece list prior to giving: ", piece, getIds(pieceList))
self.debug.dprint("Piece removed: ", id(piece))
capturedPiece = pieceList.pop(pieceList.index(piece))
self.debug.dprint("New piece list: ", getIds(pieceList))
self.debug.endSection()
return capturedPiece
def returnPiece(self, piece):
"""Add the given piece to our lists"""
#I cannot simply use the all pieces API because that returns a new list
#and I need to get these pieces where they live"""
self.pieceMap[piece.piece].append(piece)
def getPiecesThatThreatenLocation(self, location):
"""Return a list of my pieces that can capture the piece at the given location"""
def canPieceAttackLocation(piece):
moves = self.getValidMovesForPiece(piece)
if location in moves and Util.MoveType.CAPTURE in moves[location]:
return True
return list(filter(canPieceAttackLocation, self.getAllPieces()))
def verifyCheck(self):
"""Check to see if I am checked, and update my flag as appropriate"""
self.debug.startSection("verifyCheck")
self.debug.dprint(self.color, "Player transferring control to other player to get pieces that can attack our King at: ", self.king.position)
if len(self.otherPlayer.getPiecesThatThreatenLocation(self.king.position)) != 0:
self.checked = True
else:
self.checked = False
self.mated = False
self.debug.dprint("Our checked status: ", self.checked)
self.debug.endSection()
return self.checked
def verifyMate(self):
"""Check to see if I am mated, and update my flag as appropriate"""
self.debug.startSection("verifyMate")
if self.checked:
#Get the attacking pieces to start off with"""
self.debug.dprint(self.color, "Player transferring control to other player to get pieces that can attack our King at: ", self.king.position)
attackingPieces = self.otherPlayer.getPiecesThatThreatenLocation(self.king.position)
numberOfAttackers = len(attackingPieces)
self.debug.dprint("Number of pieces attacking our King: ", numberOfAttackers)
if numberOfAttackers == 0:
self.checked = False
self.mated = False
else:
#Assume mated unless proven otherwise"""
self.mated = True
#Always check to see if we can just move the king away"""
kingCanMove = False
self.debug.dprint("Getting all valid moves for the king and trying them.")
kingMovements = self.getValidMovesForPiece(self.king)
for move in kingMovements:
if self._testMove(self.king.position, move):
kingCanMove = True
self.mated = False
break
if numberOfAttackers == 1 and not kingCanMove:
#We only check other pieces to see if they can interfere if there is only one attacker,
#I believe that there are no cases where two or more attacking pieces can be stopped by
#anything other than moving the king
self.debug.dprint("The king is stuck, try moving all other pieces into the path of the one attacker.")
attacker = attackingPieces[0]
vBoard = VerifyBoard(self.getAllPieces() + self.otherPlayer.getAllPieces())
pathToKing = attacker.getPath(self.king.position, vBoard)
#Now get all of my pieces minus the king, we have already taken care of his movements
myPieces = self.getAllPieces()
myPieces.pop() #here we use the fact that the king is added last as a quick way of removing him
for piece in myPieces:
for coord in pathToKing:
if self._testMove(piece.position, coord):
self.mated = False
break
else:
self.debug.dprint("Not checked.")
self.mated = False
self.debug.dprint("Our mated status: ", self.mated)
self.debug.endSection()
return self.mated