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MoveGenerator.py
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from copy import deepcopy as copy
from utils import flip_pieces
class MoveGenerator:
@staticmethod
def GenerateMovesOpening(board):
return MoveGenerator.GenerateAdd(board)
@staticmethod
def GenerateMovesMidgameEndgame(board):
L = list()
if(board.count('W') == 3):
return MoveGenerator.GenerateHopping(board)
else:
return MoveGenerator.GenerateMove(board)
@staticmethod
def GenerateAdd(board):
L = list()
for location, _ in enumerate(board):
if(board[location]=='x'):
b = copy(board)
b[location] = 'W'
if MoveGenerator.closeMill(location, b):
L = MoveGenerator.GenerateRemove(b, L)
else:
L.append(b)
return L
@staticmethod
def GenerateHopping(board):
L = list()
for location_alpha, _ in enumerate(board):
if(board[location_alpha] == "W"):
for location_beta, _ in enumerate(board):
if(board[location_beta]=='x'):
b = copy(board)
b[location_alpha] = 'x'
b[location_beta] = 'W'
if (MoveGenerator.closeMill(location_beta, b)):
L = MoveGenerator.GenerateRemove(b,L)
else:
L.append(b)
return L
@staticmethod
def GenerateMove(board):
L = list()
for location, _ in enumerate(board):
if(board[location]=='W'):
n = MoveGenerator.neighbors(location)
for j in n:
if board[j] == 'x':
b = copy(board)
b[location] = 'x'
b[j] = 'W'
if MoveGenerator.closeMill(j,b):
L = MoveGenerator.GenerateRemove(b, L)
else:
L.append(b)
return L
@staticmethod
def GenerateRemove(board, L):
L_copy = copy(L)
positionAddedFlag = False
for location,_ in enumerate(board):
if(board[location]=='B'):
if(MoveGenerator.closeMill(location, board) == False):
b = copy(board)
b[location] = 'x'
L_copy.append(b)
positionAddedFlag = True
if(positionAddedFlag == False):
L_copy.append(board)
return L_copy
@staticmethod
def neighbors(location):
neighbors_dict = {
0: [19, 3, 1],
1: [0, 4, 2],
2: [1, 5, 12],
3: [0, 8, 6, 4],
4: [3, 1, 5],
5: [4, 7, 11, 2],
6: [3, 9, 7],
7: [6, 10, 5],
8: [3, 16, 9],
9: [8, 6, 13],
10: [7, 15, 11],
11: [10, 5, 18, 12],
12: [11, 2, 21],
13: [16, 9, 14],
14: [13, 17, 15],
15: [14, 10, 18],
16: [19, 8, 13, 17],
17: [16, 14, 20, 18],
18: [17, 15, 11, 21],
19: [0, 16, 20],
20: [19, 17, 21],
21: [20, 18, 12]
}
return neighbors_dict[location]
@staticmethod
def __comparePieces(board, i,j,C):
return board[i]==C and board[j]==C
@staticmethod
def closeMill(location, b):
C = b[location]
if(C =='W' or C == 'B'):
if(location == 0):
if(MoveGenerator.__comparePieces(b, 1, 2, C) or MoveGenerator.__comparePieces(b, 3, 6, C)):
return True
elif(location == 1):
if(MoveGenerator.__comparePieces(b, 0, 2, C)):
return True
elif(location == 2):
if(MoveGenerator.__comparePieces(b, 0, 1, C) or MoveGenerator.__comparePieces(b, 5, 7, C) or MoveGenerator.__comparePieces(b, 12, 21, C)):
return True
elif(location == 3):
if(MoveGenerator.__comparePieces(b, 0, 6, C) or MoveGenerator.__comparePieces(b, 4, 5, C) or MoveGenerator.__comparePieces(b, 8, 16, C)):
return True
elif(location == 4):
if(MoveGenerator.__comparePieces(b, 3,5, C)):
return True
elif(location == 5):
if(MoveGenerator.__comparePieces(b, 2, 7, C) or MoveGenerator.__comparePieces(b, 3, 4, C) or MoveGenerator.__comparePieces(b, 11, 18, C)):
return True
elif(location == 6):
if(MoveGenerator.__comparePieces(b, 0, 3, C) or MoveGenerator.__comparePieces(b, 9, 13, C)):
return True
elif(location == 7):
if(MoveGenerator.__comparePieces(b, 5, 2, C) or MoveGenerator.__comparePieces(b, 10, 15, C)):
return True
elif(location == 8):
if(MoveGenerator.__comparePieces(b, 3, 16, C)):
return True
elif(location == 9):
if(MoveGenerator.__comparePieces(b, 6, 13, C)):
return True
elif(location == 10):
if(MoveGenerator.__comparePieces(b, 7, 15, C) or MoveGenerator.__comparePieces(b, 11, 12, C)):
return True
elif(location == 11):
if(MoveGenerator.__comparePieces(b, 10, 12, C) or MoveGenerator.__comparePieces(b, 5, 18, C)):
return True
elif(location == 12):
if(MoveGenerator.__comparePieces(b, 10, 11, C) or MoveGenerator.__comparePieces(b, 2, 21, C)):
return True
elif(location == 13):
if(MoveGenerator.__comparePieces(b, 9, 6, C) or MoveGenerator.__comparePieces(b, 16, 19, C) or MoveGenerator.__comparePieces(b, 14, 15, C)):
return True
elif(location == 14):
if(MoveGenerator.__comparePieces(b, 13, 15, C) or MoveGenerator.__comparePieces(b, 17, 20, C)):
return True
elif(location == 15):
if(MoveGenerator.__comparePieces(b, 10, 7, C) or MoveGenerator.__comparePieces(b, 13, 14, C) or MoveGenerator.__comparePieces(b, 18, 21, C)):
return True
elif(location == 16):
if(MoveGenerator.__comparePieces(b, 13, 19, C) or MoveGenerator.__comparePieces(b, 3, 8, C) or MoveGenerator.__comparePieces(b, 17, 18, C)):
return True
elif(location == 17):
if(MoveGenerator.__comparePieces(b, 14, 20, C) or MoveGenerator.__comparePieces(b, 16, 18, C)):
return True
elif(location == 18):
if(MoveGenerator.__comparePieces(b, 15, 21, C) or MoveGenerator.__comparePieces(b, 11, 5, C) or MoveGenerator.__comparePieces(b, 16, 17, C)):
return True
elif(location == 19):
if(MoveGenerator.__comparePieces(b, 16, 13, C) or MoveGenerator.__comparePieces(b, 20, 21, C)):
return True
elif(location == 20):
if(MoveGenerator.__comparePieces(b, 19, 21, C) or MoveGenerator.__comparePieces(b, 17, 14, C)):
return True
elif(location == 21):
if(MoveGenerator.__comparePieces(b, 19, 20, C) or MoveGenerator.__comparePieces(b, 15, 18, C) or MoveGenerator.__comparePieces(b, 12, 2, C)):
return True
return False
@staticmethod
def __getNumBlackMoves(b):
b_copy = flip_pieces(b)
L = MoveGenerator.GenerateMovesMidgameEndgame(b_copy)
return len(L)
@staticmethod
def staticEstimation(b, mode='opening'):
numWhitePieces = b.count('W')
numBlackPieces = b.count('B')
if(mode=='midgame_endgame'):
numBlackMoves = MoveGenerator.__getNumBlackMoves(b)
if(numBlackPieces<=2):
return 10_000
elif (numWhitePieces <= 2):
return -10_000
elif(numBlackMoves==0):
return 10_000
else:
return (1000*(numWhitePieces - numBlackPieces) - numBlackMoves)
elif(mode == 'opening'):
return (numWhitePieces - numBlackPieces)
@staticmethod
def staticEstimationV2(b, mode='opening'):
# Corners : 0,2,3,5,6,7,13,15,16,18,19,21
numWhitePiecesAtCorners = 0
numBlackPiecesAtCorners = 0
numOfBlackPiecesBlocked = 0
numOfWhitePiecesBlocked = 0
numWhitePieces = b.count('W')
numBlackPieces = b.count('B')
for index,piece in enumerate(b):
idxToPiece = list(map(lambda x: b[x], MoveGenerator.neighbors(index)))
if (piece == 'B'):
if idxToPiece.count('W') >= 2:
numOfBlackPiecesBlocked+=1
if (piece == 'W'):
if idxToPiece.count('B') >=2:
numOfWhitePiecesBlocked+=1
if index in [0,2,3,5,6,7,13,15,16,18,19,21]:
if piece == 'W':
numWhitePiecesAtCorners+=1
else:
numBlackPiecesAtCorners+=1
if(mode=='midgame_endgame'):
numBlackMoves = MoveGenerator.__getNumBlackMoves(b)
if(numOfWhitePiecesBlocked >= numOfBlackPiecesBlocked or numBlackPieces<=2):
return 1
elif (numOfWhitePiecesBlocked < numOfBlackPiecesBlocked or numWhitePieces<=2):
return -1
elif(numBlackMoves==0):
return 1
else:
return 1000*(numOfBlackPiecesBlocked + numWhitePiecesAtCorners) - (numOfWhitePiecesBlocked + numBlackPiecesAtCorners + numBlackMoves)
elif(mode == 'opening'):
return (numWhitePieces+ numWhitePiecesAtCorners+numOfBlackPiecesBlocked) - (numBlackPieces+numBlackPiecesAtCorners+numOfWhitePiecesBlocked)