def draw_knight_move(board, x_coor, y_coor): modified = False if (x_coor - 2) >= 0 and (y_coor - 1) >= 0: val = board[x_coor - 2][y_coor - 1] # if we have never landed on element if val == '.': board[x_coor - 2][y_coor - 1] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] modified = True if (x_coor - 2) >= 0 and (y_coor + 1) < height: val = board[x_coor - 2][y_coor + 1] if val == '.': board[x_coor - 2][y_coor + 1] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] modified = True if (x_coor + 2) < width and (y_coor - 1) >= 0: val = board[x_coor + 2][y_coor - 1] if val == '.': board[x_coor + 2][y_coor - 1] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] modified = True if (x_coor + 2) < width and (y_coor + 1) < height: val = board[x_coor + 2][y_coor + 1] if val == '.': board[x_coor + 2][y_coor + 1] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] modified = True if (x_coor - 1) >= 0 and (y_coor - 2) >= 0: val = board[x_coor - 1][y_coor - 2] if val == '.': board[x_coor - 1][y_coor - 2] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] modified = True if (x_coor - 1) >= 0 and (y_coor + 2) < height: val = board[x_coor - 1][y_coor + 2] if val == '.': board[x_coor - 1][y_coor + 2] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] modified = True if (x_coor + 1) < width and (y_coor - 2) >= 0: val = board[x_coor + 1][y_coor - 2] if val == '.': board[x_coor + 1][y_coor - 2] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] modified = True if (x_coor + 1) < width and (y_coor + 2) < height: val = board[x_coor + 1][y_coor + 2] if val == '.': board[x_coor + 1][y_coor + 2] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] modified = True return modified
def draw_knight_move(board, board_with_num_moves, special_board, x_coor, y_coor, step, width, height): modified = False if (x_coor - 2) >= 0 and (y_coor - 1) >= 0: val = board[x_coor - 2][y_coor - 1] element = special_board[x_coor - 2][y_coor - 1] # if never landed on spot or block element if val == '.' and element != 'R' and element != 'B': if (special_board[x_coor][y_coor - 1] != 'B' and special_board[x_coor - 1][y_coor - 1] != 'B') or \ (special_board[x_coor - 1][y_coor] != 'B' and special_board[x_coor - 2][y_coor] != 'B'): board[x_coor - 2][y_coor - 1] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] board_with_num_moves[x_coor - 2][y_coor - 1] = step if element == 'W': board_with_num_moves[x_coor - 2][y_coor - 1] += 1 elif element == 'L': board_with_num_moves[x_coor - 2][y_coor - 1] += 4 modified = True if (x_coor - 2) >= 0 and (y_coor + 1) < height: val = board[x_coor - 2][y_coor + 1] element = special_board[x_coor - 2][y_coor + 1] if val == '.' and element != 'R' and element != 'B': if (special_board[x_coor][y_coor + 1] != 'B' and special_board[x_coor - 1][y_coor + 1] != 'B') or \ (special_board[x_coor - 1][y_coor] != 'B' and special_board[x_coor - 2][y_coor] != 'B'): board[x_coor - 2][y_coor + 1] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] board_with_num_moves[x_coor - 2][y_coor + 1] = step if element == 'W': board_with_num_moves[x_coor - 2][y_coor + 1] += 1 elif element == 'L': board_with_num_moves[x_coor - 2][y_coor + 1] += 4 modified = True if (x_coor + 2) < width and (y_coor - 1) >= 0: val = board[x_coor + 2][y_coor - 1] element = special_board[x_coor + 2][y_coor - 1] if val == '.' and element != 'R' and element != 'B': if (special_board[x_coor][y_coor - 1] != 'B' and special_board[x_coor - 1][y_coor - 1] != 'B') or \ (special_board[x_coor + 1][y_coor] != 'B' and special_board[x_coor + 2][y_coor] != 'B'): board[x_coor + 2][y_coor - 1] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] board_with_num_moves[x_coor + 2][y_coor - 1] = step if element == 'W': board_with_num_moves[x_coor + 2][y_coor - 1] += 1 elif element == 'L': board_with_num_moves[x_coor + 2][y_coor - 1] += 4 modified = True if (x_coor + 2) < width and (y_coor + 1) < height: val = board[x_coor + 2][y_coor + 1] element = special_board[x_coor + 2][y_coor + 1] if val == '.' and element != 'R' and element != 'B': if (special_board[x_coor][y_coor + 1] != 'B' and special_board[x_coor + 1][y_coor + 1] != 'B') or \ (special_board[x_coor + 1][y_coor] != 'B' and special_board[x_coor + 2][y_coor] != 'B'): board[x_coor + 2][y_coor + 1] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] board_with_num_moves[x_coor + 2][y_coor + 1] = step if element == 'W': board_with_num_moves[x_coor + 2][y_coor + 1] += 1 elif element == 'L': board_with_num_moves[x_coor + 2][y_coor + 1] += 4 modified = True if (x_coor - 1) >= 0 and (y_coor - 2) >= 0: val = board[x_coor - 1][y_coor - 2] element = special_board[x_coor - 1][y_coor - 2] if val == '.' and element != 'R' and element != 'B': if (special_board[x_coor][y_coor - 1] != 'B' and special_board[x_coor][y_coor - 2] != 'B') or \ (special_board[x_coor - 1][y_coor] != 'B' and special_board[x_coor - 1][y_coor - 1] != 'B'): board[x_coor - 1][y_coor - 2] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] board_with_num_moves[x_coor - 1][y_coor - 2] = step if element == 'W': board_with_num_moves[x_coor - 1][y_coor - 2] += 1 elif element == 'L': board_with_num_moves[x_coor - 1][y_coor - 2] += 4 modified = True if (x_coor - 1) >= 0 and (y_coor + 2) < height: val = board[x_coor - 1][y_coor + 2] element = special_board[x_coor - 1][y_coor + 2] if val == '.' and element != 'R' and element != 'B': if (special_board[x_coor][y_coor + 1] != 'B' and special_board[x_coor][y_coor + 2] != 'B') or \ (special_board[x_coor - 1][y_coor] != 'B' and special_board[x_coor - 1][y_coor + 1] != 'B'): board[x_coor - 1][y_coor + 2] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] board_with_num_moves[x_coor - 1][y_coor + 2] = step if element == 'W': board_with_num_moves[x_coor - 1][y_coor + 2] += 1 elif element == 'L': board_with_num_moves[x_coor - 1][y_coor + 2] += 4 modified = True if (x_coor + 1) < width and (y_coor - 2) >= 0: val = board[x_coor + 1][y_coor - 2] element = special_board[x_coor + 1][y_coor - 2] if val == '.' and element != 'R' and element != 'B': if (special_board[x_coor][y_coor - 1] != 'B' and special_board[x_coor][y_coor - 2] != 'B') or \ (special_board[x_coor + 1][y_coor] != 'B' and special_board[x_coor + 1][y_coor - 1] != 'B'): board[x_coor + 1][y_coor - 2] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] board_with_num_moves[x_coor + 1][y_coor - 2] = step if element == 'W': board_with_num_moves[x_coor + 1][y_coor - 2] += 1 elif element == 'L': board_with_num_moves[x_coor + 1][y_coor - 2] += 4 modified = True if (x_coor + 1) < width and (y_coor + 2) < height: val = board[x_coor + 1][y_coor + 2] element = special_board[x_coor + 1][y_coor + 2] if val == '.' and element != 'R' and element != 'B': if (special_board[x_coor][y_coor + 1] != 'B' and special_board[x_coor][y_coor + 2] != 'B') or \ (special_board[x_coor + 1][y_coor] != 'B' and special_board[x_coor + 1][y_coor + 1] != 'B'): board[x_coor + 1][y_coor + 2] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] board_with_num_moves[x_coor + 1][y_coor + 2] = step if element == 'W': board_with_num_moves[x_coor + 1][y_coor + 2] += 1 elif element == 'L': board_with_num_moves[x_coor + 1][y_coor + 2] += 4 modified = True return modified
def main():
special_board = import_special_board()
width = len(special_board)
height = len(special_board[0])
tools.print_board(special_board)
# get list of teleport spots
teleport_list = []
for y in range(len(special_board[0])):
for x in range(len(special_board)):
if special_board[x][y] == 'T':
teleport_list.append(tools.coor_to_string(x, y))
# get input for data. We don't want to start on an element for simplicity.
print "What is the start location?"
valid_start_coor = False
while not valid_start_coor:
start_x_coor, start_y_coor = tools.get_input_coordinates(width, height)
element = special_board[start_x_coor][start_y_coor]
if element == 'W' or element == 'R' or element == 'B' or element == 'T' or element == 'L':
print "Start has element. Enter new start location:"
valid_start_coor = False
else:
valid_start_coor = True
print "What is the end location?"
unique_end_coor = False
while not unique_end_coor:
end_x_coor, end_y_coor = tools.get_input_coordinates(width, height)
element = special_board[end_x_coor][end_y_coor]
if (start_x_coor == end_x_coor) and (start_y_coor == end_y_coor):
print "Same as start. Enter new end location:"
unique_end_coor = False
elif element == 'W' or element == 'R' or element == 'B' or element == 'T' or element == 'L':
print "End has element. Enter new end location:"
unique_end_coor = False
else:
unique_end_coor = True
# mark start/end location
board = [['.' for x in range(height)] for x in range(width)]
board[start_x_coor][start_y_coor] = 'S'
board[end_x_coor][end_y_coor] = 'E'
# initialize board storing moves
board_with_moves = [['.' for x in range(height)] for x in range(width)]
board_with_moves[start_x_coor][start_y_coor] = []
# store number of moves. Important because of our elements
board_with_num_moves = [['.' for x in range(height)] for x in range(width)]
board_with_num_moves[start_x_coor][start_y_coor] = 0
continue_loop = True
current_step = 0
teleport_done = False
while continue_loop:
continue_loop = False
for y in range(len(board[0])):
for x in range(len(board)):
if board_with_moves[x][y] != '.' and board_with_num_moves[x][y] == current_step:
modified = draw_knight_move(board_with_moves, board_with_num_moves, special_board, x, y, current_step + 1, width, height)
if modified:
continue_loop = True
# shortest move found!
if board_with_moves[end_x_coor][end_y_coor] != '.':
move_to_end = board_with_moves[end_x_coor][end_y_coor]
special_board_to_print = [row[:] for row in special_board]
for num_move in range(1, len(move_to_end)):
x, y = tools.string_to_coor(move_to_end[num_move])
special_board_to_print[start_x_coor][start_y_coor] = 'S'
special_board_to_print[end_x_coor][end_y_coor] = 'E'
special_board_to_print[x][y] = board_with_num_moves[x][y]
tools.print_board(special_board_to_print)
print 'Sequence of moves: '
for num_move in range(0, len(move_to_end)):
x, y = tools.string_to_coor(move_to_end[num_move])
print '(' , x, ', ', y, ')'
print '(' , end_x_coor, ', ', end_y_coor, ')'
# we want to check if sequence of moves are all valid
valid_knight_moves = True
for idx in range(1, len(move_to_end)):
prev_x, prev_y = tools.string_to_coor(move_to_end[idx - 1])
x, y = tools.string_to_coor(move_to_end[idx])
if not tools.is_valid_knight_move(prev_x, prev_y, x, y) and move_to_end[idx] not in teleport_list:
print 'Invalid'
valid_knight_moves = False
break
if valid_knight_moves:
print '--- All valid knight moves'
else:
print '--- Invalid knight moves'
exit()
current_step += 1
# check if anything has landed on teleport locations.
# because we care about shortest moves, if we land on one, then move all other moves to teleport.
if not teleport_done:
for teleport_str in teleport_list:
t_x, t_y = tools.string_to_coor(teleport_str)
if board_with_moves[t_x][t_y] != '.':
for teleport_str in teleport_list:
t_x_, t_y_ = tools.string_to_coor(teleport_str)
if board_with_moves[t_x_][t_y_] == '.':
board_with_moves[t_x_][t_y_] = board_with_moves[t_x][t_y][:]
board_with_num_moves[t_x_][t_y_] = board_with_num_moves[t_x][t_y]
break
def draw_knight_move(board, board_with_moves_set, x_coor, y_coor): modified = False if (x_coor - 2) >= 0 and (y_coor - 1) >= 0: val = board[x_coor - 2][y_coor - 1] # if spot not already encountered in move... if tools.coor_to_string(x_coor - 2, y_coor - 1) not in board_with_moves_set[x_coor][y_coor]: board[x_coor - 2][y_coor - 1] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] curr_set = board_with_moves_set[x_coor][y_coor].copy() curr_set.add(tools.coor_to_string(x_coor - 2, y_coor - 1)) board_with_moves_set[x_coor - 2][y_coor - 1] = curr_set modified = True if (x_coor - 2) >= 0 and (y_coor + 1) < height: val = board[x_coor - 2][y_coor + 1] if tools.coor_to_string(x_coor - 2, y_coor + 1) not in board_with_moves_set[x_coor][y_coor]: board[x_coor - 2][y_coor + 1] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] curr_set = board_with_moves_set[x_coor][y_coor].copy() curr_set.add(tools.coor_to_string(x_coor - 2, y_coor + 1)) board_with_moves_set[x_coor - 2][y_coor + 1] = curr_set modified = True if (x_coor + 2) < width and (y_coor - 1) >= 0: val = board[x_coor + 2][y_coor - 1] if tools.coor_to_string(x_coor + 2, y_coor - 1) not in board_with_moves_set[x_coor][y_coor]: board[x_coor + 2][y_coor - 1] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] curr_set = board_with_moves_set[x_coor][y_coor].copy() curr_set.add(tools.coor_to_string(x_coor + 2, y_coor - 1)) board_with_moves_set[x_coor + 2][y_coor - 1] = curr_set modified = True if (x_coor + 2) < width and (y_coor + 1) < height: val = board[x_coor + 2][y_coor + 1] if tools.coor_to_string(x_coor + 2, y_coor + 1) not in board_with_moves_set[x_coor][y_coor]: board[x_coor + 2][y_coor + 1] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] curr_set = board_with_moves_set[x_coor][y_coor].copy() curr_set.add(tools.coor_to_string(x_coor + 2, y_coor + 1)) board_with_moves_set[x_coor + 2][y_coor + 1] = curr_set modified = True if (x_coor - 1) >= 0 and (y_coor - 2) >= 0: val = board[x_coor - 1][y_coor - 2] if tools.coor_to_string(x_coor - 1, y_coor - 2) not in board_with_moves_set[x_coor][y_coor]: board[x_coor - 1][y_coor - 2] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] curr_set = board_with_moves_set[x_coor][y_coor].copy() curr_set.add(tools.coor_to_string(x_coor - 1, y_coor - 2)) board_with_moves_set[x_coor - 1][y_coor - 2] = curr_set modified = True if (x_coor - 1) >= 0 and (y_coor + 2) < height: val = board[x_coor - 1][y_coor + 2] if tools.coor_to_string(x_coor - 1, y_coor + 2) not in board_with_moves_set[x_coor][y_coor]: board[x_coor - 1][y_coor + 2] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] curr_set = board_with_moves_set[x_coor][y_coor].copy() curr_set.add(tools.coor_to_string(x_coor - 1, y_coor + 2)) board_with_moves_set[x_coor - 1][y_coor + 2] = curr_set modified = True if (x_coor + 1) < width and (y_coor - 2) >= 0: val = board[x_coor + 1][y_coor - 2] if tools.coor_to_string(x_coor + 1, y_coor - 2) not in board_with_moves_set[x_coor][y_coor]: board[x_coor + 1][y_coor - 2] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] curr_set = board_with_moves_set[x_coor][y_coor].copy() curr_set.add(tools.coor_to_string(x_coor + 1, y_coor - 2)) board_with_moves_set[x_coor + 1][y_coor - 2] = curr_set modified = True if (x_coor + 1) < width and (y_coor + 2) < height: val = board[x_coor + 1][y_coor + 2] if tools.coor_to_string(x_coor + 1, y_coor + 2) not in board_with_moves_set[x_coor][y_coor]: board[x_coor + 1][y_coor + 2] = board[x_coor][y_coor][:] + [tools.coor_to_string(x_coor, y_coor)] curr_set = board_with_moves_set[x_coor][y_coor].copy() curr_set.add(tools.coor_to_string(x_coor + 1, y_coor + 2)) board_with_moves_set[x_coor + 1][y_coor + 2] = curr_set modified = True return modified