def init_neighbor_table(dim):
rows, cols = dim
new_table = {}
for r in range(1, rows + 1):
for c in range(1, cols + 1):
p = Point(row=r, col=c)
full_neighbors = p.neighbors()
true_neighbors = [
n for n in full_neighbors
if 1 <= n.row <= rows and 1 <= n.col <= cols
]
new_table[p] = true_neighbors
neighbor_tables[dim] = new_table
def encode(self, game_state):
board_tensor = np.zeros(
(self.num_planes, self.board_height, self.board_width))
for r in range(self.board_height):
for c in range(self.board_width):
point = Point(row=r + 1, col=c + 1)
go_string = game_state.board.get_go_string(point)
if go_string and go_string.color == game_state.next_player:
board_tensor[offset("stone_color")][r][c] = 1
elif go_string and go_string.color == game_state.next_player.other:
board_tensor[offset("stone_color") + 1][r][c] = 1
else:
board_tensor[offset("stone_color") + 2][r][c] = 1
board_tensor[offset("ones")] = self.ones()
board_tensor[offset("zeros")] = self.zeros()
if not is_point_an_eye(game_state.board, point,
game_state.next_player):
board_tensor[offset("sensibleness")][r][c] = 1
ages = min(game_state.board.move_ages.get(r, c), 8)
if ages > 0:
board_tensor[int(offset("turns_since") + ages)][r][c] = 1
if game_state.board.get_go_string(point):
liberties = min(
game_state.board.get_go_string(point).num_liberties, 8)
board_tensor[int(offset("liberties") +
liberties)][r][c] = 1
move = Move(point)
if game_state.is_valid_move(move):
new_state = game_state.apply_move(move)
liberties = min(
new_state.board.get_go_string(point).num_liberties, 8)
board_tensor[int(offset("liberties_after") +
liberties)][r][c] = 1
adjacent_strings = [
game_state.board.get_go_string(nb)
for nb in point.neighbors()
]
capture_count = 0
for go_string in adjacent_strings:
other_player = game_state.next_player.other
if go_string and go_string.num_liberties == 1 and go_string.color == other_player:
capture_count += len(go_string.stones)
capture_count = min(capture_count, 8)
board_tensor[int(offset("capture_size") +
capture_count)][r][c] = 1
if go_string and go_string.num_liberties == 1:
go_string = game_state.board.get_go_string(point)
if go_string:
num_atari_stones = min(len(go_string.stones), 8)
board_tensor[int(
offset("self_atari_size") +
num_atari_stones)][r][c] = 1
if is_ladder_capture(game_state, point):
board_tensor[offset("ladder_capture")][r][c] = 1
if is_ladder_escape(game_state, point):
board_tensor[offset("ladder_escape")][r][c] = 1
if self.use_player_plane:
if game_state.next_player == Player.black:
board_tensor[offset("ones")] = self.ones()
else:
board_tensor[offset("zeros")] = self.zeros()
return board_tensor