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vc.py
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vc.py
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import re
import numpy as np
from functions import check_five
def check_pattern(pattern: re.Pattern, partial_board):
if partial_board is None:
return None
tmp_res = pattern.search(partial_board)
return None if tmp_res is None else tmp_res.span()
def generate_partial_boards(board, flip_board, x, y):
partial_board1 = board[x, :]
pl1 = len(partial_board1)
partial_board1 = ("{}" * pl1).format(*(partial_board1[i] for i in range(pl1)))
partial_board2 = board[:, y]
pl2 = len(partial_board2)
partial_board2 = ("{}" * pl2).format(*(partial_board2[i] for i in range(pl2)))
partial_board3 = np.diagonal(board, offset=y - x)
pl3 = len(partial_board3)
if pl3 >= 5:
partial_board3 = ("{}" * pl3).format(*(partial_board3[i] for i in range(pl3)))
else:
partial_board3 = None
partial_board4 = np.diagonal(flip_board, offset=len(board) - 1 - y - x)
pl4 = len(partial_board4)
if pl4 >= 5:
partial_board4 = ("{}" * pl4).format(*(partial_board4[i] for i in range(pl4)))
else:
partial_board4 = None
return partial_board1, partial_board2, partial_board3, partial_board4
class VC:
def __init__(self, color: int) -> None:
super().__init__()
if color == 1: # 黑棋杀
self.bl4 = re.compile('011110')
self.bb4 = ['211110', '011112', '^11110', '01111$', '11101', '10111', '11011']
self.bb4 = [re.compile(self.bb4[i]) for i in range(len(self.bb4))]
self.bl3 = ['001110', '011100', '011010', '010110']
self.bl3 = [re.compile(self.bl3[i]) for i in range(len(self.bl3))]
self.wl4 = re.compile('022220')
self.wb4 = {'122220': 5, '022221': 0, '^22220': 4, '02222$': 0, '22202': 3, '20222': 1, '22022': 2}
self.wl3 = {'002220': (0, 1, 5), '022200': (0, 4, 5), '022020': (0, 3, 5), '020220': (0, 2, 5)}
else: # 白棋杀
self.bl4 = re.compile('022220')
self.bb4 = ['122220', '022221', '^22220', '02222$', '22202', '20222', '22022']
self.bb4 = [re.compile(self.bb4[i]) for i in range(len(self.bb4))]
self.bl3 = ['002220', '022200', '022020', '020220']
self.bl3 = [re.compile(self.bl3[i]) for i in range(len(self.bl3))]
self.wl4 = re.compile('011110')
self.wb4 = {'211110': 5, '011112': 0, '^11110': 4, '01111$': 0, '11101': 3, '10111': 1, '11011': 2}
self.wl3 = {'001110': (0, 1, 5), '011100': (0, 4, 5), '011010': (0, 3, 5), '010110': (0, 2, 5)}
for key in self.wb4.keys():
self.wb4[key] = [re.compile(key), self.wb4[key]]
for key in self.wl3.keys():
self.wl3[key] = [re.compile(key), self.wl3[key]]
self.dx = [1, 1, 0, -1, -1, -1, 0, 1]
self.dy = [0, 1, 1, 1, 0, -1, -1, -1]
self._2dx = [2, 2, 0, -2, -2, -2, 0, 2]
self._2dy = [0, 2, 2, 2, 0, -2, -2, -2]
def vc_search(self, color: int, x: int, y: int, board: np.array, flip_board: np.array, depth: int, vc_flag: bool):
"""
:param x: 上一步的x坐标
:param y: 上一步的y坐标
"""
if depth == 0:
return False, None, None
if vc_flag: # 黑棋
# 算白棋能否成连五，能的话直接返回不能
bw_flag = check_five(board, x, y, 3 - color)
if bw_flag:
return False, None, None
# 算黑棋能否成连五，能得话直接返回能
vis = np.zeros((15, 15))
for i in range(len(board)):
for j in range(len(board)):
if board[i][j] == 0:
flag = 0
for k in range(8):
x1, y1 = i + self.dx[k], j + self.dy[k]
if 0 <= x1 < 15 and 0 <= y1 < 15:
if board[x1][y1] == color:
flag = 1
break
if flag == 1:
vis[i][j] = 1
board[i][j] = color
if check_five(board, i, j, color):
board[i][j] = 0
return True, i, j
board[i][j] = 0
# 算白棋上一步是否形成活四，如形成则返回不能
pb1, pb2, pb3, pb4 = generate_partial_boards(board, flip_board, x, y)
if check_pattern(self.wl4, pb1) is not None or check_pattern(self.wl4, pb2) is not None or \
check_pattern(self.wl4, pb3) is not None or check_pattern(self.wl4, pb4):
return False, None, None
# 算白棋上一步是否形成冲四，形成冲四则选择防守位置继续递归
for key in self.wb4:
pattern = self.wb4[key][0]
r1, r2, r3, r4 = check_pattern(pattern, pb1), check_pattern(pattern, pb2), check_pattern(pattern, pb3), \
check_pattern(pattern, pb4)
if r1 is not None:
n_y = r1[0] + self.wb4[key][1]
board[x][n_y] = color
flip_board[x][14 - n_y] = color
res, _, _ = self.vc_search(3 - color, x, n_y, board, flip_board, depth - 1, not vc_flag)
board[x][n_y] = 0
flip_board[x][14 - n_y] = 0
if res:
return True, x, n_y
else:
return False, None, None
if r2 is not None:
n_x = r2[0] + self.wb4[key][1]
board[n_x][y] = color
flip_board[n_x][14 - y] = color
res, _, _ = self.vc_search(3 - color, n_x, y, board, flip_board, depth - 1, not vc_flag)
board[n_x][y] = 0
flip_board[n_x][14 - y] = 0
if res:
return True, n_x, y
else:
return False, None, None
if r3 is not None:
if x > y:
n_y = r3[0] + self.wb4[key][1]
n_x = (x - y) + n_y
else:
n_x = r3[0] + self.wb4[key][1]
n_y = n_x + y - x
board[n_x][n_y] = color
flip_board[n_x][14 - n_y] = color
res, _, _ = self.vc_search(3 - color, n_x, n_y, board, flip_board, depth - 1, not vc_flag)
board[n_x][n_y] = 0
flip_board[n_x][14 - n_y] = 0
if res:
return True, n_x, n_y
else:
return False, None, None
if r4 is not None:
f_y = 14 - y
if x > f_y:
n_y = r4[0] + self.wb4[key][1]
n_x = (x - f_y) + n_y
n_y = 14 - n_y
else:
n_x = r4[0] + self.wb4[key][1]
n_y = n_x + f_y - x
n_y = 14 - n_y
board[n_x][n_y] = color
flip_board[n_x][14 - n_y] = color
res, _, _ = self.vc_search(3 - color, n_x, n_y, board, flip_board, depth - 1, not vc_flag)
board[n_x][n_y] = 0
flip_board[n_x][14 - n_y] = 0
if res:
return True, n_x, n_y
else:
return False, None, None
# 算黑棋能否形成活四，如形成则返回能
for i in range(len(board)):
for j in range(len(board)):
if vis[i][j] == 1:
board[i][j] = color
flip_board[i][14 - j] = color
_pb1, _pb2, _pb3, _pb4 = generate_partial_boards(board, flip_board, i, j)
if check_pattern(self.bl4, _pb1) is not None or check_pattern(self.bl4,
_pb2) is not None or \
check_pattern(self.bl4, _pb3) is not None or check_pattern(self.bl4, _pb4):
board[i][j] = 0
flip_board[i][14 - j] = 0
return True, i, j
board[i][j] = 0
flip_board[i][14 - j] = 0
# 否则算黑棋有无能形成冲四的位置，有的话继续递归
for i in range(len(board)):
for j in range(len(board)):
if vis[i][j] == 1:
board[i][j] = color
flip_board[i][14 - j] = color
for pattern in self.bb4:
_pb1, _pb2, _pb3, _pb4 = generate_partial_boards(board, flip_board, i, j)
if check_pattern(pattern, _pb1) is not None or check_pattern(pattern, _pb2) is not None \
or check_pattern(pattern, _pb3) is not None or check_pattern(pattern, _pb4):
res, _, _ = self.vc_search(3 - color, i, j, board, flip_board, depth - 1,
not vc_flag)
if res is True:
board[i][j] = 0
flip_board[i][14 - j] = 0
return True, i, j
board[i][j] = 0
flip_board[i][14 - j] = 0
# 否则算白棋有无活三，有的话防守
for key in self.wl3:
pattern = self.wl3[key][0]
r1, r2, r3, r4 = check_pattern(pattern, pb1), check_pattern(pattern, pb2), check_pattern(
pattern, pb3), \
check_pattern(pattern, pb4)
if r1 is not None:
for i in range(3):
n_y = r1[0] + self.wl3[key][1][i]
board[x][n_y] = color
flip_board[x][14 - n_y] = color
res, _, _ = self.vc_search(3 - color, x, n_y, board, flip_board, depth - 1, not vc_flag)
board[x][n_y] = 0
flip_board[x][14 - n_y] = 0
if res:
return True, x, n_y
return False, None, None
if r2 is not None:
for i in range(3):
n_x = r2[0] + self.wl3[key][1][i]
board[n_x][y] = color
flip_board[n_x][14 - y] = color
res, _, _ = self.vc_search(3 - color, n_x, y, board, flip_board, depth - 1, not vc_flag)
board[n_x][y] = 0
flip_board[n_x][14 - y] = 0
if res:
return True, n_x, y
return False, None, None
if r3 is not None:
for i in range(3):
if x > y:
n_y = r3[0] + self.wl3[key][1][i]
n_x = (x - y) + n_y
else:
n_x = r3[0] + self.wl3[key][1][i]
n_y = n_x + y - x
board[n_x][n_y] = color
flip_board[n_x][14 - n_y] = color
res, _, _ = self.vc_search(3 - color, n_x, n_y, board, flip_board, depth - 1,
not vc_flag)
board[n_x][n_y] = 0
flip_board[n_x][14 - n_y] = 0
if res:
return True, n_x, n_y
return False, None, None
if r4 is not None:
for i in range(3):
f_y = 14 - y
if x > f_y:
n_y = r4[0] + self.wl3[key][1][i]
n_x = (x - f_y) + n_y
n_y = 14 - n_y
else:
n_x = r4[0] + self.wl3[key][1][i]
n_y = n_x + f_y - x
n_y = 14 - n_y
board[n_x][n_y] = color
flip_board[n_x][14 - n_y] = color
res, _, _ = self.vc_search(3 - color, n_x, n_y, board, flip_board, depth - 1,
not vc_flag)
board[n_x][n_y] = 0
flip_board[n_x][14 - n_y] = 0
if res:
return True, n_x, n_y
return False, None, None
# 否则算黑棋有无能形成活三的位置，有的话进攻
for i in range(len(board)):
for j in range(len(board)):
if vis[i][j] == 1:
board[i][j] = color
flip_board[i][14 - j] = color
for pattern in self.bl3:
pb1, pb2, pb3, pb4 = generate_partial_boards(board, flip_board, i, j)
if check_pattern(pattern, pb1) is not None or check_pattern(pattern, pb2) is not None \
or check_pattern(pattern, pb3) is not None or check_pattern(pattern, pb4):
res, _, _ = self.vc_search(3 - color, i, j, board, flip_board, depth - 1,
not vc_flag)
if res is True:
board[i][j] = 0
flip_board[i][14 - j] = 0
return True, i, j
board[i][j] = 0
flip_board[i][14 - j] = 0
return False, None, None
else: # 白棋
for i in range(len(board)):
for j in range(len(board)):
flag = 0
if board[i][j] == 0:
# 位置剪枝
for k in range(8):
x1, y1 = i + self.dx[k], j + self.dy[k]
if 0 <= x1 < 15 and 0 <= y1 < 15:
if board[x1][y1] != 0:
flag = 1
break
else:
x2, y2 = i + self._2dx[k], j + self._2dy[k]
if 0 <= x2 < 15 and 0 <= y2 < 15:
if board[x2][y2] != 0:
flag = 1
break
if flag == 1:
board[i][j] = color
flip_board[i][14 - j] = color
res, _, _ = self.vc_search(3 - color, i, j, board, flip_board, depth - 1, not vc_flag)
board[i][j] = 0
flip_board[i][14 - j] = 0
if res is False:
return False, None, None
return True, None, None