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fairyfishtest.py
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fairyfishtest.py
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#!/usr/bin/env python3
#
# fairyfishtest is a script for automated chess variant engine matches.
# Copyright (C) 2020 Fabian Fichter
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import argparse
from collections import Counter
import logging
import math
import random
import subprocess
import threading
import time
import pyffish as sf
class Engine:
def __init__(self, args, options):
self.process = subprocess.Popen(args, stdin=subprocess.PIPE, stdout=subprocess.PIPE, universal_newlines=True)
self.lock = threading.Lock()
self.partner = None
self.rank_conversion = False # convert ranks from zero-based to one-based
self.options = options
def initialize(self):
with self.lock:
self.process.stdin.write('xboard\n')
self.process.stdin.write('protover 2\n')
for option, value in self.options.items():
self.process.stdin.write('option {}={}\n'.format(option, value))
self.process.stdin.flush()
def newgame(self, variant, time_control):
with self.lock:
self.rank_conversion = sf.start_fen(variant).count('/') + 1 == 10
self.process.stdin.write('new\n')
self.process.stdin.write('variant {}\n'.format(variant))
if self.partner:
self.process.stdin.write('partner test\n')
self.process.stdin.write('level {}\n'.format(time_control.format_xboard()))
self.process.stdin.flush()
def update_clocks(self, time, otim):
with self.lock:
# times in centiseconds
self.process.stdin.write('time {}\n'.format(int(time * 100)))
self.process.stdin.write('otim {}\n'.format(int(otim * 100)))
self.process.stdin.flush()
def go(self):
with self.lock:
self.process.stdin.write('go\n')
self.process.stdin.flush()
def get_move(self):
while True:
line = self.process.stdout.readline()
if self.partner and line.startswith('tellics ptell'):
self.partner.ptell(line.strip().split(None, 2)[2])
if line.startswith('move'):
return self.move_to_uci(line.strip().split()[1], self.rank_conversion)
if line.startswith(('1-0', '0-1', '1/2-1/2')):
return None
@staticmethod
def move_to_uci(move, rank_conversion):
if move == '@@@@':
return '0000'
elif rank_conversion and move:
square1 = move[0] + str(int(move[1]) + 1) if move[1].isnumeric() else move[0:2]
square2 = move[2] + str(int(move[3]) + 1) if move[3].isnumeric() else move[2:4]
return square1 + square2 + move[4:]
else:
return move
@staticmethod
def move_from_uci(move, rank_conversion):
if len(move) % 2 == 0 and move[:len(move) // 2] == move[len(move) // 2:]:
return '@@@@'
elif rank_conversion and move and len(move) >= 4:
len1 = 2 + move[2].isnumeric()
len2 = 2 + (len(move) > len1 + 2 and move[len1 + 2].isnumeric())
square1 = move[0] + str(int(move[1:len1]) - 1) if move[1:len1].isnumeric() else move[0:len1]
square2 = (move[len1] + str(int(move[len1 + 1:len1 + len2]) - 1)
if move[len1 + 1:len1 + len2].isnumeric() else move[len1 + 1:len1 + len2])
return square1 + square2 + move[len1 + len2:]
else:
return move
def ptell(self, message):
with self.lock:
self.process.stdin.write('ptell {}\n'.format(message))
self.process.stdin.flush()
def holding(self, holding):
with self.lock:
self.process.stdin.write('holding {}\n'.format(holding))
self.process.stdin.flush()
def usermove(self, move):
with self.lock:
self.process.stdin.write('usermove {}\n'.format(self.move_from_uci(move, self.rank_conversion)))
self.process.stdin.flush()
class TimeControl:
def __init__(self, time, increment=0, moves=0):
self.time = time
self.increment = increment
self.moves = moves
@staticmethod
def parse(stringified_tc):
time_and_increment = stringified_tc.split('+')
moves_and_time = time_and_increment[0].split('/')
time = float(moves_and_time[-1])
increment = float(time_and_increment[1]) if len(time_and_increment) > 1 else 0
moves = int(moves_and_time[0]) if len(moves_and_time) > 1 else 0
return TimeControl(time, increment, moves)
def format_xboard(self):
return '{} {}:{} {}'.format(self.moves, int(self.time // 60), int(self.time % 60), int(self.increment))
def __str__(self):
return ('{}/'.format(self.moves) if self.moves else '') + '{}+{}'.format(self.time, self.increment)
class Game:
def __init__(self, engine1, engine2, time_control, variant='chess', start_fen=None):
self.engines = [engine1, engine2]
self.time_control = time_control
self.variant = variant
self.start_fen = start_fen or sf.start_fen(variant)
self.moves = []
self.result = None
self.partner = None
self.obtained_holdings = ''
self.clock_times = [self.time_control.time, self.time_control.time]
self.lock = threading.RLock()
def initialize(self):
for engine in self.engines:
engine.initialize()
engine.newgame(self.variant, self.time_control)
def is_legal(self):
assert self.moves
return self.moves[-1] in sf.legal_moves(self.variant, self.get_start_fen(), self.moves[:-1])
def is_game_end(self):
with self.lock:
game_end = False
if self.clock_times[(len(self.moves) - 1) % 2] <= 0:
# time loss
logging.warning('Engine {} loses on time.'.format((len(self.moves) - 1) % 2 + 1))
result = 1
game_end = True
elif self.moves and not self.is_legal():
# last move was illegal
result = 1
game_end = True
logging.error('Illegal move: {}'.format(self.moves[-1]))
elif not sf.legal_moves(self.variant, self.get_start_fen(), self.moves):
game_end = True
result = sf.game_result(self.variant, self.get_start_fen(), self.moves)
else:
game_end, result = sf.is_optional_game_end(self.variant, self.get_start_fen(), self.moves)
if game_end:
self.result = int(math.copysign(1, result if len(self.moves) % 2 == 0 else -result)) if result else result
return game_end
def play(self):
self.initialize()
while not self.is_game_end() and not (self.partner and self.partner.is_game_end()):
idx = len(self.moves) % 2
engine = self.engines[idx]
engine.update_clocks(self.clock_times[idx], self.clock_times[idx - 1])
engine.usermove(self.moves[-1]) if self.moves else engine.go()
start_time = time.time()
with self.lock:
self.moves.append(engine.get_move())
# woraround for e1e1-style passing moves
if self.moves[-1] == '0000':
moves = sf.legal_moves(self.variant, self.get_start_fen(), self.moves[:-1])
pass_candidates = [move for move in moves if Engine.move_from_uci(move, False) == '@@@@']
if len(pass_candidates) == 1:
self.moves[-1] = pass_candidates[0]
end_time = time.time()
self.clock_times[idx] += self.time_control.increment - (end_time - start_time)
logging.debug('Position: {}, Move: {}'.format(sf.get_fen(self.variant, self.get_start_fen(), self.moves[:-1]),
self.moves[-1]))
if self.partner and self.is_legal():
captured = self.get_captured()
if captured:
self.partner.set_holdings(captured)
def get_captured(self):
# TODO: this does not consider promoted pieces
previous_fen = sf.get_fen(self.variant, self.get_start_fen(), self.moves[:-1])
current_fen = sf.get_fen(self.variant, self.get_start_fen(), self.moves)
piece_filter = str.isupper if current_fen.split()[1] == 'w' else str.islower
previous_pieces = Counter(filter(piece_filter, previous_fen.split()[0]))
current_pieces = Counter(filter(piece_filter, current_fen.split()[0]))
return ''.join((previous_pieces - current_pieces).elements())
def get_start_fen(self):
if self.partner:
# inject obtained holdings
fen_split = self.start_fen.split(']', 1)
with self.lock:
return ']'.join([fen_split[0] + self.obtained_holdings, fen_split[1]])
else:
return self.start_fen
def get_holdings(self):
fen = sf.get_fen(self.variant, self.get_start_fen(), self.moves)
return fen.split('[', 1)[1].split(']', 1)[0]
def set_holdings(self, captured):
with self.lock:
self.obtained_holdings += captured
holdings = self.get_holdings()
white_holdings = ''.join(filter(str.isupper, holdings)).upper()
black_holdings = ''.join(filter(str.islower, holdings)).upper()
xboard_holdings = '[{}] [{}]'.format(white_holdings, black_holdings)
if captured:
xboard_holdings += ' ' + ('W' if captured.isupper() else 'B') + captured.upper()
logging.debug('holding {}'.format(xboard_holdings))
for engine in self.engines:
engine.holding(xboard_holdings)
class Match:
def __init__(self, engine1, engine2, e1_options, e2_options, time_control, variant='chess', games=1, start_fens=None):
self.two_boards = sf.two_boards(variant)
self.engines = [Engine([engine1], e1_options), Engine([engine2], e2_options)]
self.board2_engines = [Engine([engine1], e1_options), Engine([engine2], e2_options)] if self.two_boards else None
self.time_control = time_control
self.variant = variant
self.games = games
self.start_fens = start_fens if start_fens else [sf.start_fen(variant)]
self.score = [0, 0, 0]
def play_game(self):
flip = sum(self.score) % 2
game = Game(self.engines[flip], self.engines[not flip], self.time_control,
self.variant, random.choice(self.start_fens))
if self.two_boards:
game2 = Game(self.board2_engines[not flip], self.board2_engines[flip], self.time_control,
self.variant, random.choice(self.start_fens))
game.partner = game2
game2.partner = game
self.engines[0].partner = self.board2_engines[0]
self.engines[1].partner = self.board2_engines[1]
self.board2_engines[0].partner = self.engines[0]
self.board2_engines[1].partner = self.engines[1]
thread2 = threading.Thread(target=game2.play, daemon=True)
thread2.start()
game.play()
if self.two_boards:
thread2.join()
logging.debug('Board1: {}, Board2: {}'.format(game.result, game2.result))
assert game.result in (1, 0, -1) or game2.result in (1, 0, -1)
result = (game.result or 0) - (game2.result or 0)
if result:
result //= abs(result)
else:
result = game.result
assert result in (1, 0, -1)
relative_result = -result if flip else result
self.score[relative_result - 1] += 1
logging.debug('Game finished after {} moves.'.format(len(game.moves)))
def run(self):
while sum(self.score) < self.games:
self.play_game()
logging.info('Total: {} W: {} L: {} D: {}'.format(sum(self.score), *self.score))
def main(engine1, engine2, e1_options, e2_options, time_control, variant, num_games, **kwargs):
match = Match(engine1, engine2, dict(e1_options), dict(e2_options), time_control, variant, num_games)
match.run()
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument('engine1', help='path to first engine')
parser.add_argument('engine2', help='path to second engine')
parser.add_argument('--e1-options', help='options for first UCI engine', type=lambda kv: kv.split('='), action='append', default=[])
parser.add_argument('--e2-options', help='options for second UCI engine', type=lambda kv: kv.split('='), action='append', default=[])
parser.add_argument('-t', '--time-control', type=str, default='10+0',
help='Time control in format moves/time+increment')
parser.add_argument('-v', '--variant', default='chess', help='variant name')
parser.add_argument('-n', '--num-games', type=int, default=1000, help='maximum number of games')
parser.add_argument('-l', '--log-level', default='INFO', help='logging level')
args = parser.parse_args()
numeric_level = getattr(logging, args.log_level.upper(), None)
if not isinstance(numeric_level, int):
parser.error('Invalid log level: {}'.format(args.log_level))
try:
args.time_control = TimeControl.parse(args.time_control)
except Exception:
parser.error('Invalid time control: {}'.format(args.time_control))
if args.time_control.moves: # TODO: support epochs
parser.error('Time control not supported: {}'.format(args.time_control))
logging.basicConfig(level=numeric_level, format='%(message)s')
main(**vars(args))