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Copy pathCheckers
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Checkers
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import sys
def make_move(board, player, start, end):
# check if start and end are on the board
if start[0] < 0 or start[0] >= len(board):
return False
if start[1] < 0 or start[1] >= len(board):
return False
if end[0] < 0 or end[0] >= len(board):
return False
if end[1] < 0 or end[1] >= len(board):
return False
# check if start and end are on the same row or column
if start[0] != end[0] and start[1] != end[1]:
return False
# check if the move is diagonal
if abs(start[0] - end[0]) != abs(start[1] - end[1]):
return False
# check if there is a piece at start
if board[start[0]][start[1]] == '_':
return False
# check if the piece at start is the correct color
if board[start[0]][start[1]].lower() != player:
return False
# check if the space at end is empty
if board[end[0]][end[1]] != '_':
return False
# check if the move is a single space move
if start[0] == end[0] and start[1] == end[1] - 1:
return True
if start[0] == end[0] and start[1] == end[1] + 1:
return True
# check if the move is a jump move
if player == 'b':
if start[0] == end[0] + 2 and start[1] == end[1] + 2 and board[start[0] - 1][start[1] + 1].lower() == 'w':
return True
if start[0] == end[0] + 2 and start[1] == end[1] - 2 and board[start[0] - 1][start[1] - 1].lower() == 'w':
return True
if player == 'w':
if start[0] == end[0] - 2 and start[1] == end[1] + 2 and board[start[0] + 1][start[1] + 1].lower() == 'b':
return True
if start[0] == end[0] - 2 and start[1] == end[1] - 2 and board[start[0] + 1][start[1] - 1].lower() == 'b':
return True
return False
def make_jump(board, player, start, end):
# check if start and end are on the board
if start[0] < 0 or start[0] >= len(board):
return False
if start[1] < 0 or start[1] >= len(board):
return False
if end[0] < 0 or end[0] >= len(board):
return False
if end[1] < 0 or end[1] >= len(board):
return False
# check if start and end are on the same row or column
if start[0] != end[0] and start[1] != end[1]:
return False
# check if the move is diagonal
if abs(start[0] - end[0]) != abs(start[1] - end[1]):
return False
# check if there is a piece at start
if board[start[0]][start[1]] == '_':
return False
# check if the piece at start is the correct color
if board[start[0]][start[1]].lower() != player:
return False
# check if the space at end is empty
if board[end[0]][end[1]] != '_':
return False
# check if the move is a jump move
if player == 'b':
if start[0] == end[0] + 2 and start[1] == end[1] + 2 and board[start[0] - 1][start[1] + 1].lower() == 'w':
return True
if start[0] == end[0] + 2 and start[1] == end[1] - 2 and board[start[0] - 1][start[1] - 1].lower() == 'w':
return True
if player == 'w':
if start[0] == end[0] - 2 and start[1] == end[1] + 2 and board[start[0] + 1][start[1] + 1].lower() == 'b':
return True
if start[0] == end[0] - 2 and start[1] == end[1] - 2 and board[start[0] + 1][start[1] - 1].lower() == 'b':
return True
return False
def is_king(piece):
if piece == 'b' or piece == 'w':
return False
return True
def get_valid_moves(board, player, start):
moves = []
if player == 'b':
if start[0] < len(board) - 1:
if is_king(board[start[0]][start[1]]):
if start[1] > 0:
if make_move(board, player, start, (start[0] + 1, start[1] - 1)):
moves.append((start[0] + 1, start[1] - 1))
if start[1] < len(board) - 1:
if make_move(board, player, start, (start[0] + 1, start[1] + 1)):
moves.append((start[0] + 1, start[1] + 1))
else:
if make_move(board, player, start, (start[0] + 1, start[1] - 1)):
moves.append((start[0] + 1, start[1] - 1))
if make_move(board, player, start, (start[0] + 1, start[1] + 1)):
moves.append((start[0] + 1, start[1] + 1))
if is_king(board[start[0]][start[1]]):
if start[0] > 0:
if start[1] > 0:
if make_move(board, player, start, (start[0] - 1, start[1] - 1)):
moves.append((start[0] - 1, start[1] - 1))
if start[1] < len(board) - 1:
if make_move(board, player, start, (start[0] - 1, start[1] + 1)):
moves.append((start[0] - 1, start[1] + 1))
if player == 'w':
if start[0] > 0:
if is_king(board[start[0]][start[1]]):
if start[1] > 0:
if make_move(board, player, start, (start[0] - 1, start[1] - 1)):
moves.append((start[0] - 1, start[1] - 1))
if start[1] < len(board) - 1:
if make_move(board, player, start, (start[0] - 1, start[1] + 1)):
moves.append((start[0] - 1, start[1] + 1))
else:
if make_move(board, player, start, (start[0] - 1, start[1] - 1)):
moves.append((start[0] - 1, start[1] - 1))
if make_move(board, player, start, (start[0] - 1, start[1] + 1)):
moves.append((start[0] - 1, start[1] + 1))
if is_king(board[start[0]][start[1]]):
if start[0] < len(board) - 1:
if start[1] > 0:
if make_move(board, player, start, (start[0] + 1, start[1] - 1)):
moves.append((start[0] + 1, start[1] - 1))
if start[1] < len(board) - 1:
if make_move(board, player, start, (start[0] + 1, start[1] + 1)):
moves.append((start[0] + 1, start[1] + 1))
return moves
def get_valid_jumps(board, player, start):
jumps = []
if player == 'b':
if start[0] < len(board) - 1:
if is_king(board[start[0]][start[1]]):
if start[1] > 0:
if make_jump(board, player, start, (start[0] + 2, start[1] - 2)):
jumps.append((start[0] + 2, start[1] - 2))
if start[1] < len(board) - 1:
if make_jump(board, player, start, (start[0] + 2, start[1] + 2)):
jumps.append((start[0] + 2, start[1] + 2))
else:
if make_jump(board, player, start, (start[0] + 2, start[1] - 2)):
jumps.append((start[0] + 2, start[1] - 2))
if make_jump(board, player, start, (start[0] + 2, start[1] + 2)):
jumps.append((start[0] + 2, start[1] + 2))
if is_king(board[start[0]][start[1]]):
if start[0] > 0:
if start[1] > 0:
if make_jump(board, player, start, (start[0] - 2, start[1] - 2)):
jumps.append((start[0] - 2, start[1] - 2))
if start[1] < len(board) - 1:
if make_jump(board, player, start, (start[0] - 2, start[1] + 2)):
jumps.append((start[0] - 2, start[1] + 2))
if player == 'w':
if start[0] > 0:
if is_king(board[start[0]][start[1]]):
if start[1] > 0:
if make_jump(board, player, start, (start[0] - 2, start[1] - 2)):
jumps.append((start[0] - 2, start[1] - 2))
if start[1] < len(board) - 1:
if make_jump(board, player, start, (start[0] - 2, start[1] + 2)):
jumps.append((start[0] - 2, start[1] + 2))
else:
if make_jump(board, player, start, (start[0] - 2, start[1] - 2)):
jumps.append((start[0] - 2, start[1] - 2))
if make_jump(board, player, start, (start[0] - 2, start[1] + 2)):
jumps.append((start[0] - 2, start[1] + 2))
if is_king(board[start[0]][start[1]]):
if start[0] < len(board) - 1:
if start[1] > 0:
if make_jump(board, player, start, (start[0] + 2, start[1] - 2)):
jumps.append((start[0] + 2, start[1] - 2))
if start[1] < len(board) - 1:
if make_jump(board, player, start, (start[0] + 2, start[1] + 2)):
jumps.append((start[0] + 2, start[1] + 2))
return jumps
def get_jumps(board, player, start, end, hops):
if start == end:
return hops
jumps = get_valid_jumps(board, player, start)
for jump in jumps:
if jump not in hops:
hops.append(jump)
hops = get_jumps(board, player, jump, end, hops)
return hops
def do_move(board, player, start, end):
if make_move(board, player, start, end):
board[end[0]][end[1]] = board[start[0]][start[1]]
board[start[0]][start[1]] = '_'
if player == 'b' and end[0] == len(board) - 1:
board[end[0]][end[1]] = board[end[0]][end[1]].upper()
if player == 'w' and end[0] == 0:
board[end[0]][end[1]] = board[end[0]][end[1]].upper()
return True
return False
def do_jump(board, player, start, end):
if make_jump(board, player, start, end):
board[end[0]][end[1]] = board[start[0]][start[1]]
board[start[0]][start[1]] = '_'
mid = ((start[0] + end[0]) // 2, (start[1] + end[1]) // 2)
board[mid[0]][mid[1]] = '_'
if player == 'b' and end[0] == len(board) - 1:
board[end[0]][end[1]] = board[end[0]][end[1]].upper()
if player == 'w' and end[0] == 0:
board[end[0]][end[1]] = board[end[0]][end[1]].upper()
return True
return False