def test_capture_multiple_groups(self):
board = utils_test.load_board('''
.OX......
OXX......
XX.......
''' + EMPTY_ROW * 6)
lib_tracker = LibertyTracker.from_board(utils_test.BOARD_SIZE, board)
captured = lib_tracker.add_stone(BLACK, coords.from_kgs(
utils_test.BOARD_SIZE, 'A9'))
self.assertEqual(len(lib_tracker.groups), 2)
self.assertEqual(captured, coords_from_kgs_set('B9 A8'))
corner_stone = lib_tracker.groups[lib_tracker.group_index[coords.from_kgs(
utils_test.BOARD_SIZE, 'A9')]]
self.assertEqual(corner_stone.stones, coords_from_kgs_set('A9'))
self.assertEqual(corner_stone.liberties, coords_from_kgs_set('B9 A8'))
surrounding_stones = lib_tracker.groups[lib_tracker.group_index[
coords.from_kgs(utils_test.BOARD_SIZE, 'C9')]]
self.assertEqual(surrounding_stones.stones,
coords_from_kgs_set('C9 B8 C8 A7 B7'))
self.assertEqual(surrounding_stones.liberties,
coords_from_kgs_set('B9 D9 A8 D8 C7 A6 B6'))
liberty_cache = lib_tracker.liberty_cache
for stone in corner_stone.stones:
self.assertEqual(liberty_cache[stone], 2, str(stone))
for stone in surrounding_stones.stones:
self.assertEqual(liberty_cache[stone], 7, str(stone))
def test_chinese_handicap_handling(self):
intermediate_board = utils_test.load_board('''
.........
.........
......X..
.........
.........
.........
.........
.........
.........
''')
intermediate_position = go.Position(
utils_test.BOARD_SIZE,
intermediate_board,
n=1,
komi=5.5,
caps=(0, 0),
recent=(go.PlayerMove(go.BLACK, coords.from_kgs(
utils_test.BOARD_SIZE, 'G7')),),
to_play=go.BLACK,
)
final_board = utils_test.load_board('''
....OX...
.O.OOX...
O.O.X.X..
.OXXX....
OX...XX..
.X.XXO...
X.XOOXXX.
XXXO.OOX.
.XOOX.O..
''')
final_position = go.Position(
utils_test.BOARD_SIZE,
final_board,
n=50,
komi=5.5,
caps=(7, 2),
ko=None,
recent=(
go.PlayerMove(
go.WHITE, coords.from_kgs(utils_test.BOARD_SIZE, 'E9')),
go.PlayerMove(
go.BLACK, coords.from_kgs(utils_test.BOARD_SIZE, 'F9')),),
to_play=go.WHITE
)
positions_w_context = list(replay_sgf(
utils_test.BOARD_SIZE, CHINESE_HANDICAP_SGF))
self.assertEqualPositions(
intermediate_position, positions_w_context[1].position)
self.assertEqual(
positions_w_context[1].next_move, coords.from_kgs(
utils_test.BOARD_SIZE, 'C3'))
final_replayed_position = positions_w_context[-1].position.play_move(
positions_w_context[-1].next_move)
self.assertEqualPositions(final_position, final_replayed_position)
def test_neighbors(self):
corner = coords.from_kgs(utils_test.BOARD_SIZE, 'A1')
neighbors = [
utils_test.EMPTY_BOARD[c] for c in utils_test.NEIGHBORS[corner]]
self.assertEqual(len(neighbors), 2)
side = coords.from_kgs(utils_test.BOARD_SIZE, 'A2')
side_neighbors = [
utils_test.EMPTY_BOARD[c] for c in utils_test.NEIGHBORS[side]]
self.assertEqual(len(side_neighbors), 3)
def test_japanese_handicap_handling(self):
intermediate_board = utils_test.load_board('''
.........
.........
......X..
.........
....O....
.........
..X......
.........
.........
''')
intermediate_position = go.Position(
utils_test.BOARD_SIZE,
intermediate_board,
n=1,
komi=5.5,
caps=(0, 0),
recent=(go.PlayerMove(go.WHITE, coords.from_kgs(
utils_test.BOARD_SIZE, 'E5')),),
to_play=go.BLACK,
)
final_board = utils_test.load_board('''
.........
.........
......X..
.........
....O....
.........
..XX.....
.........
.........
''')
final_position = go.Position(
utils_test.BOARD_SIZE,
final_board,
n=2,
komi=5.5,
caps=(0, 0),
recent=(
go.PlayerMove(go.WHITE, coords.from_kgs(
utils_test.BOARD_SIZE, 'E5')),
go.PlayerMove(go.BLACK, coords.from_kgs(
utils_test.BOARD_SIZE, 'D3')),),
to_play=go.WHITE,
)
positions_w_context = list(replay_sgf(
utils_test.BOARD_SIZE, JAPANESE_HANDICAP_SGF))
self.assertEqualPositions(
intermediate_position, positions_w_context[1].position)
final_replayed_position = positions_w_context[-1].position.play_move(
positions_w_context[-1].next_move)
self.assertEqualPositions(final_position, final_replayed_position)
def test_is_koish(self):
self.assertEqual(go.is_koish(
utils_test.BOARD_SIZE, TEST_BOARD, coords.from_kgs(
utils_test.BOARD_SIZE, 'A9')), BLACK)
self.assertEqual(go.is_koish(
utils_test.BOARD_SIZE, TEST_BOARD, coords.from_kgs(
utils_test.BOARD_SIZE, 'B8')), None)
self.assertEqual(go.is_koish(
utils_test.BOARD_SIZE, TEST_BOARD, coords.from_kgs(
utils_test.BOARD_SIZE, 'B9')), None)
self.assertEqual(
go.is_koish(utils_test.BOARD_SIZE, TEST_BOARD, coords.from_kgs(
utils_test.BOARD_SIZE, 'E5')), None)
def test_capture_stone(self):
board = utils_test.load_board('''
.X.......
XO.......
.X.......
''' + EMPTY_ROW * 6)
lib_tracker = LibertyTracker.from_board(utils_test.BOARD_SIZE, board)
captured = lib_tracker.add_stone(BLACK, coords.from_kgs(
utils_test.BOARD_SIZE, 'C8'))
self.assertEqual(len(lib_tracker.groups), 4)
self.assertEqual(
lib_tracker.group_index[coords.from_kgs(
utils_test.BOARD_SIZE, 'B8')], go.MISSING_GROUP_ID)
self.assertEqual(captured, coords_from_kgs_set('B8'))
def test_move(self):
start_position = Position(
utils_test.BOARD_SIZE,
board=TEST_BOARD,
n=0,
komi=6.5,
caps=(1, 2),
ko=None,
recent=tuple(),
to_play=BLACK,
)
expected_board = utils_test.load_board('''
.XX....OO
X........
''' + EMPTY_ROW * 7)
expected_position = Position(
utils_test.BOARD_SIZE,
board=expected_board,
n=1,
komi=6.5,
caps=(1, 2),
ko=None,
recent=(PlayerMove(BLACK, coords.from_kgs(
utils_test.BOARD_SIZE, 'C9')),),
to_play=WHITE,
)
actual_position = start_position.play_move(coords.from_kgs(
utils_test.BOARD_SIZE, 'C9'))
self.assertEqualPositions(actual_position, expected_position)
expected_board2 = utils_test.load_board('''
.XX....OO
X.......O
''' + EMPTY_ROW * 7)
expected_position2 = Position(
utils_test.BOARD_SIZE,
board=expected_board2,
n=2,
komi=6.5,
caps=(1, 2),
ko=None,
recent=(
PlayerMove(BLACK, coords.from_kgs(utils_test.BOARD_SIZE, 'C9')),
PlayerMove(WHITE, coords.from_kgs(utils_test.BOARD_SIZE, 'J8')),),
to_play=BLACK,
)
actual_position2 = actual_position.play_move(coords.from_kgs(
utils_test.BOARD_SIZE, 'J8'))
self.assertEqualPositions(actual_position2, expected_position2)
def test_lib_tracker_init(self):
board = utils_test.load_board('X........' + EMPTY_ROW * 8)
lib_tracker = LibertyTracker.from_board(utils_test.BOARD_SIZE, board)
self.assertEqual(len(lib_tracker.groups), 1)
self.assertNotEqual(
lib_tracker.group_index[coords.from_kgs(
utils_test.BOARD_SIZE, 'A9')], go.MISSING_GROUP_ID)
self.assertEqual(lib_tracker.liberty_cache[coords.from_kgs(
utils_test.BOARD_SIZE, 'A9')], 2)
sole_group = lib_tracker.groups[lib_tracker.group_index[coords.from_kgs(
utils_test.BOARD_SIZE, 'A9')]]
self.assertEqual(sole_group.stones, coords_from_kgs_set('A9'))
self.assertEqual(sole_group.liberties, coords_from_kgs_set('B9 A8'))
self.assertEqual(sole_group.color, BLACK)
def test_parallel_tree_search(self):
player = initialize_almost_done_player()
# check -- white is losing.
self.assertEqual(player.root.position.score(), -0.5)
# initialize the tree so that the root node has populated children.
player.tree_search(num_parallel=1)
# virtual losses should enable multiple searches to happen simultaneously
# without throwing an error...
for i in range(5):
player.tree_search(num_parallel=4)
# uncomment to debug this test
# print(player.root.describe())
# Search should converge on D9 as only winning move.
flattened = coords.to_flat(
utils_test.BOARD_SIZE, coords.from_kgs(utils_test.BOARD_SIZE,
'D9'))
best_move = np.argmax(player.root.child_N)
self.assertEqual(best_move, flattened)
# D9 should have a positive value
self.assertGreater(player.root.children[flattened].Q, 0)
self.assertGreaterEqual(player.root.N, 20)
# passing should be ineffective.
self.assertLess(player.root.child_Q[-1], 0)
# no virtual losses should be pending
self.assertNoPendingVirtualLosses(player.root)
def test_ko_move(self):
start_board = utils_test.load_board('''
.OX......
OX.......
''' + EMPTY_ROW * 7)
start_position = Position(
utils_test.BOARD_SIZE,
board=start_board,
n=0,
komi=6.5,
caps=(1, 2),
ko=None,
recent=tuple(),
to_play=BLACK,
)
expected_board = utils_test.load_board('''
X.X......
OX.......
''' + EMPTY_ROW * 7)
expected_position = Position(
utils_test.BOARD_SIZE,
board=expected_board,
n=1,
komi=6.5,
caps=(2, 2),
ko=coords.from_kgs(utils_test.BOARD_SIZE, 'B9'),
recent=(PlayerMove(BLACK, coords.from_kgs(
utils_test.BOARD_SIZE, 'A9')),),
to_play=WHITE,
)
actual_position = start_position.play_move(coords.from_kgs(
utils_test.BOARD_SIZE, 'A9'))
self.assertEqualPositions(actual_position, expected_position)
# Check that retaking ko is illegal until two intervening moves
with self.assertRaises(go.IllegalMove):
actual_position.play_move(coords.from_kgs(utils_test.BOARD_SIZE, 'B9'))
pass_twice = actual_position.pass_move().pass_move()
ko_delayed_retake = pass_twice.play_move(coords.from_kgs(
utils_test.BOARD_SIZE, 'B9'))
expected_position = Position(
utils_test.BOARD_SIZE,
board=start_board,
n=4,
komi=6.5,
caps=(2, 3),
ko=coords.from_kgs(utils_test.BOARD_SIZE, 'A9'),
recent=(
PlayerMove(BLACK, coords.from_kgs(utils_test.BOARD_SIZE, 'A9')),
PlayerMove(WHITE, None),
PlayerMove(BLACK, None),
PlayerMove(WHITE, coords.from_kgs(utils_test.BOARD_SIZE, 'B9')),),
to_play=BLACK)
self.assertEqualPositions(ko_delayed_retake, expected_position)
def test_place_stone_opposite_color(self):
board = utils_test.load_board('X........' + EMPTY_ROW * 8)
lib_tracker = LibertyTracker.from_board(utils_test.BOARD_SIZE, board)
lib_tracker.add_stone(WHITE, coords.from_kgs(utils_test.BOARD_SIZE, 'B9'))
self.assertEqual(len(lib_tracker.groups), 2)
self.assertNotEqual(
lib_tracker.group_index[coords.from_kgs(
utils_test.BOARD_SIZE, 'A9')], go.MISSING_GROUP_ID)
self.assertNotEqual(
lib_tracker.group_index[coords.from_kgs(
utils_test.BOARD_SIZE, 'B9')], go.MISSING_GROUP_ID)
self.assertEqual(lib_tracker.liberty_cache[coords.from_kgs(
utils_test.BOARD_SIZE, 'A9')], 1)
self.assertEqual(lib_tracker.liberty_cache[coords.from_kgs(
utils_test.BOARD_SIZE, 'B9')], 2)
black_group = lib_tracker.groups[lib_tracker.group_index[coords.from_kgs(
utils_test.BOARD_SIZE, 'A9')]]
white_group = lib_tracker.groups[lib_tracker.group_index[coords.from_kgs(
utils_test.BOARD_SIZE, 'B9')]]
self.assertEqual(black_group.stones, coords_from_kgs_set('A9'))
self.assertEqual(black_group.liberties, coords_from_kgs_set('A8'))
self.assertEqual(black_group.color, BLACK)
self.assertEqual(white_group.stones, coords_from_kgs_set('B9'))
self.assertEqual(white_group.liberties, coords_from_kgs_set('C9 B8'))
self.assertEqual(white_group.color, WHITE)
def test_same_friendly_group_neighboring_twice(self):
board = utils_test.load_board('''
XX.......
X........
''' + EMPTY_ROW * 7)
lib_tracker = LibertyTracker.from_board(utils_test.BOARD_SIZE, board)
captured = lib_tracker.add_stone(BLACK, coords.from_kgs(
utils_test.BOARD_SIZE, 'B8'))
self.assertEqual(len(lib_tracker.groups), 1)
sole_group_id = lib_tracker.group_index[coords.from_kgs(
utils_test.BOARD_SIZE, 'A9')]
sole_group = lib_tracker.groups[sole_group_id]
self.assertEqual(sole_group.stones,
coords_from_kgs_set('A9 B9 A8 B8'))
self.assertEqual(sole_group.liberties,
coords_from_kgs_set('C9 C8 A7 B7'))
self.assertEqual(captured, set())
def test_select_leaf(self):
flattened = coords.to_flat(
utils_test.BOARD_SIZE, coords.from_kgs(utils_test.BOARD_SIZE,
'D9'))
probs = np.array([.02] *
(utils_test.BOARD_SIZE * utils_test.BOARD_SIZE + 1))
probs[flattened] = 0.4
root = MCTSNode(utils_test.BOARD_SIZE, SEND_TWO_RETURN_ONE)
root.select_leaf().incorporate_results(probs, 0, root)
self.assertEqual(root.position.to_play, go.WHITE)
self.assertEqual(root.select_leaf(), root.children[flattened])
def test_same_opponent_group_neighboring_twice(self):
board = utils_test.load_board('''
XX.......
X........
''' + EMPTY_ROW * 7)
lib_tracker = LibertyTracker.from_board(utils_test.BOARD_SIZE, board)
captured = lib_tracker.add_stone(WHITE, coords.from_kgs(
utils_test.BOARD_SIZE, 'B8'))
self.assertEqual(len(lib_tracker.groups), 2)
black_group = lib_tracker.groups[lib_tracker.group_index[coords.from_kgs(
utils_test.BOARD_SIZE, 'A9')]]
self.assertEqual(black_group.stones, coords_from_kgs_set('A9 B9 A8'))
self.assertEqual(black_group.liberties, coords_from_kgs_set('C9 A7'))
white_group = lib_tracker.groups[lib_tracker.group_index[coords.from_kgs(
utils_test.BOARD_SIZE, 'B8')]]
self.assertEqual(white_group.stones, coords_from_kgs_set('B8'))
self.assertEqual(white_group.liberties, coords_from_kgs_set('C8 B7'))
self.assertEqual(captured, set())
def test_move_with_capture(self):
start_board = utils_test.load_board(
EMPTY_ROW * 5 + '''
XXXX.....
XOOX.....
O.OX.....
OOXX.....
''')
start_position = Position(
utils_test.BOARD_SIZE,
board=start_board,
n=0,
komi=6.5,
caps=(1, 2),
ko=None,
recent=tuple(),
to_play=BLACK,
)
expected_board = utils_test.load_board(
EMPTY_ROW * 5 + '''
XXXX.....
X..X.....
.X.X.....
..XX.....
''')
expected_position = Position(
utils_test.BOARD_SIZE,
board=expected_board,
n=1,
komi=6.5,
caps=(7, 2),
ko=None,
recent=(PlayerMove(BLACK, coords.from_kgs(
utils_test.BOARD_SIZE, 'B2')),),
to_play=WHITE, )
actual_position = start_position.play_move(coords.from_kgs(
utils_test.BOARD_SIZE, 'B2'))
self.assertEqualPositions(actual_position, expected_position)
def test_merge_multiple_groups(self):
board = utils_test.load_board('''
.X.......
X.X......
.X.......
''' + EMPTY_ROW * 6)
lib_tracker = LibertyTracker.from_board(utils_test.BOARD_SIZE, board)
lib_tracker.add_stone(BLACK, coords.from_kgs(utils_test.BOARD_SIZE, 'B8'))
self.assertEqual(len(lib_tracker.groups), 1)
self.assertNotEqual(
lib_tracker.group_index[coords.from_kgs(
utils_test.BOARD_SIZE, 'B8')], go.MISSING_GROUP_ID)
sole_group = lib_tracker.groups[lib_tracker.group_index[coords.from_kgs(
utils_test.BOARD_SIZE, 'B8')]]
self.assertEqual(sole_group.stones,
coords_from_kgs_set('B9 A8 B8 C8 B7'))
self.assertEqual(sole_group.liberties,
coords_from_kgs_set('A9 C9 D8 A7 C7 B6'))
self.assertEqual(sole_group.color, BLACK)
liberty_cache = lib_tracker.liberty_cache
for stone in sole_group.stones:
self.assertEqual(liberty_cache[stone], 6, str(stone))
def test_capture_many(self):
board = utils_test.load_board('''
.XX......
XOO......
.XX......
''' + EMPTY_ROW * 6)
lib_tracker = LibertyTracker.from_board(utils_test.BOARD_SIZE, board)
captured = lib_tracker.add_stone(BLACK, coords.from_kgs(
utils_test.BOARD_SIZE, 'D8'))
self.assertEqual(len(lib_tracker.groups), 4)
self.assertEqual(
lib_tracker.group_index[coords.from_kgs(
utils_test.BOARD_SIZE, 'B8')], go.MISSING_GROUP_ID)
self.assertEqual(captured, coords_from_kgs_set('B8 C8'))
left_group = lib_tracker.groups[lib_tracker.group_index[coords.from_kgs(
utils_test.BOARD_SIZE, 'A8')]]
self.assertEqual(left_group.stones, coords_from_kgs_set('A8'))
self.assertEqual(left_group.liberties,
coords_from_kgs_set('A9 B8 A7'))
right_group = lib_tracker.groups[lib_tracker.group_index[coords.from_kgs(
utils_test.BOARD_SIZE, 'D8')]]
self.assertEqual(right_group.stones, coords_from_kgs_set('D8'))
self.assertEqual(right_group.liberties,
coords_from_kgs_set('D9 C8 E8 D7'))
top_group = lib_tracker.groups[lib_tracker.group_index[coords.from_kgs(
utils_test.BOARD_SIZE, 'B9')]]
self.assertEqual(top_group.stones, coords_from_kgs_set('B9 C9'))
self.assertEqual(top_group.liberties,
coords_from_kgs_set('A9 D9 B8 C8'))
bottom_group = lib_tracker.groups[lib_tracker.group_index[coords.from_kgs(
utils_test.BOARD_SIZE, 'B7')]]
self.assertEqual(bottom_group.stones, coords_from_kgs_set('B7 C7'))
self.assertEqual(bottom_group.liberties,
coords_from_kgs_set('B8 C8 A7 D7 B6 C6'))
liberty_cache = lib_tracker.liberty_cache
for stone in top_group.stones:
self.assertEqual(liberty_cache[stone], 4, str(stone))
for stone in left_group.stones:
self.assertEqual(liberty_cache[stone], 3, str(stone))
for stone in right_group.stones:
self.assertEqual(liberty_cache[stone], 4, str(stone))
for stone in bottom_group.stones:
self.assertEqual(liberty_cache[stone], 6, str(stone))
for stone in captured:
self.assertEqual(liberty_cache[stone], 0, str(stone))
def test_passing(self):
start_position = Position(
utils_test.BOARD_SIZE,
board=TEST_BOARD,
n=0,
komi=6.5,
caps=(1, 2),
ko=coords.from_kgs(utils_test.BOARD_SIZE, 'A1'),
recent=tuple(),
to_play=BLACK,
)
expected_position = Position(
utils_test.BOARD_SIZE,
board=TEST_BOARD,
n=1,
komi=6.5,
caps=(1, 2),
ko=None,
recent=(PlayerMove(BLACK, None),),
to_play=WHITE,
)
pass_position = start_position.pass_move()
self.assertEqualPositions(pass_position, expected_position)
def test_flipturn(self):
start_position = Position(
utils_test.BOARD_SIZE,
board=TEST_BOARD,
n=0,
komi=6.5,
caps=(1, 2),
ko=coords.from_kgs(utils_test.BOARD_SIZE, 'A1'),
recent=tuple(),
to_play=BLACK,
)
expected_position = Position(
utils_test.BOARD_SIZE,
board=TEST_BOARD,
n=0,
komi=6.5,
caps=(1, 2),
ko=None,
recent=tuple(),
to_play=WHITE,
)
flip_position = start_position.flip_playerturn()
self.assertEqualPositions(flip_position, expected_position)
def test_dont_pass_if_losing(self):
player = initialize_almost_done_player()
# check -- white is losing.
self.assertEqual(player.root.position.score(), -0.5)
for i in range(20):
player.tree_search()
# uncomment to debug this test
# print(player.root.describe())
# Search should converge on D9 as only winning move.
flattened = coords.to_flat(
utils_test.BOARD_SIZE, coords.from_kgs(utils_test.BOARD_SIZE,
'D9'))
best_move = np.argmax(player.root.child_N)
self.assertEqual(best_move, flattened)
# D9 should have a positive value
self.assertGreater(player.root.children[flattened].Q, 0)
self.assertGreaterEqual(player.root.N, 20)
# passing should be ineffective.
self.assertLess(player.root.child_Q[-1], 0)
# no virtual losses should be pending
self.assertNoPendingVirtualLosses(player.root)
def _from_kgs(kgsc):
return coords.from_kgs(utils_test.BOARD_SIZE, kgsc)
