def selfplay():
""" Start a game sunfish vs. sunfish """
wa, ba = (['C', 'N', 'E', 'R', 'T',
'A'])[random.randint(0, 5)], (['c', 'n', 'e', 'r', 't',
'a'])[random.randint(0, 5)]
#pos = xboard.parseFEN('{}{} 33 rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1'.format(wa, ba))
pos = xboard.parseFEN(
'Ca 33 rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1')
print(' '.join(pos.board))
print('#' * 10)
for d in range(100):
move, score = sunfish.search(pos, maxn=1e3)
pos = pos.move(move)
# Always print the board from the same direction
board = pos.rotate().board if pos.color else pos.board
#board = pos.board
print(' '.join(board))
print("{}. {}: {}".format(d + 1, (['w', 'b'])[not pos.color],
xboard.mrender(pos, move)))
print("\n" + str(xboard.printFEN(pos)))
if pos.second:
print("second initiated")
move, score = sunfish.search(pos, maxn=1e2)
if move:
print("move found")
board = pos.rotate().board if pos.color else pos.board
print(' '.join(board))
print("{}. {}: {}".format(d + 1, (['w', 'b'])[not pos.color],
xboard.mrender(pos, move)))
print("\n" + str(xboard.printFEN(pos)))
pos = pos.move(move)
else:
score = 0
pos = sunfish.Position(pos.board, pos.color, False, pos.score,
pos.wa, pos.ba, pos.ws, pos.bs, pos.wc,
pos.bc, pos.ep, pos.kp)
pos = pos.rotate()
if score <= -30000:
print("Game over. White wins.")
break
if score >= 30000:
print("Game over. Black wins.")
break
print('#' * 10)
def selfplay():
""" Start a game sunfish vs. sunfish """
wa, ba = (['C', 'N', 'E', 'R', 'T', 'A'])[random.randint(0, 5)], (['c', 'n', 'e', 'r', 't', 'a'])[random.randint(0, 5)]
#pos = xboard.parseFEN('{}{} 33 rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1'.format(wa, ba))
pos = xboard.parseFEN('Ca 33 rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1')
print(' '.join(pos.board))
print('#' * 10)
for d in range(100):
move, score = sunfish.search(pos, maxn=1e3)
pos = pos.move(move)
# Always print the board from the same direction
board = pos.rotate().board if pos.color else pos.board
#board = pos.board
print(' '.join(board))
print("{}. {}: {}".format(d+1, (['w', 'b'])[not pos.color], xboard.mrender(pos, move)))
print("\n" + str(xboard.printFEN(pos)))
if pos.second:
print("second initiated")
move, score = sunfish.search(pos, maxn=1e2)
if move:
print("move found")
board = pos.rotate().board if pos.color else pos.board
print(' '.join(board))
print("{}. {}: {}".format(d+1, (['w', 'b'])[not pos.color], xboard.mrender(pos, move)))
print("\n" + str(xboard.printFEN(pos)))
pos = pos.move(move)
else:
score = 0
pos = sunfish.Position(
pos.board, pos.color, False, pos.score,
pos.wa, pos.ba, pos.ws, pos.bs,
pos.wc, pos.bc, pos.ep, pos.kp)
pos = pos.rotate()
if score <= -30000:
print("Game over. White wins.")
break
if score >= 30000:
print("Game over. Black wins.")
break
print('#' * 10)
def perft(pos, depth, divide=False):
if depth == 0:
return 1
res = 0
for m in pos.genMoves():
pos1 = pos.move(m)
# Make sure the move was legal
if not any(pos1.value(m) >= sunfish.MATE_VALUE for m in pos1.genMoves()):
sub = perft(pos1, depth-1, False)
if divide:
print(" "*depth+xboard.mrender(m), sub)
res += sub
return res
def selfplay(maxn=200):
""" Start a game sunfish vs. sunfish """
pos = xboard.parseFEN(xboard.FEN_INITIAL)
for d in range(200):
# Always print the board from the same direction
board = pos.board if d % 2 == 0 else pos.rotate().board
print(' '.join(board))
m, _ = sunfish.search(pos, maxn)
if m is None:
print("Game over")
break
print("\nmove", xboard.mrender(d%2, pos, m))
pos = pos.move(m)
def selfplay():
""" Start a game sunfish vs. sunfish """
pos = xboard.parseFEN('rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1')
for d in range(200):
# Always print the board from the same direction
board = pos.board if d % 2 == 0 else pos.rotate().board
print(' '.join(board))
m, _ = sunfish.search(pos, maxn=200)
if m is None:
print("Game over")
break
print("\nmove", xboard.mrender(d%2, pos, m))
pos = pos.move(m)
def perft(pos, depth, divide=False):
if depth == 0:
return 1
res = 0
for m in pos.genMoves():
pos1 = pos.move(m)
# Make sure the move was legal
if not any(
pos1.value(m) >= sunfish.MATE_VALUE for m in pos1.genMoves()):
sub = perft(pos1, depth - 1, False)
if divide:
print(" " * depth + xboard.mrender(m), sub)
res += sub
return res
def selfplay(maxn=200):
""" Start a game sunfish vs. sunfish """
pos = xboard.parseFEN(
'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1')
for d in range(200):
# Always print the board from the same direction
board = pos.board if d % 2 == 0 else pos.rotate().board
print(' '.join(board))
m, _ = sunfish.search(pos, maxn)
if m is None:
print("Game over")
break
print("\nmove", xboard.mrender(d % 2, pos, m))
pos = pos.move(m)
