worstresignations.py

import chess
import chess.pgn
import chess.engine
from chess import BLACK, WHITE

engine = chess.engine.SimpleEngine.popen_uci("./stockfish_20090216_x64_avx2")

import bz2
path = "lichess_db_standard_rated_2017-04.pgn.bz2"
f = bz2.open(path, "rt", encoding="ascii")
print("Opened", path)
#for i in range(1000):
#	print(f.readline())
#exit(1)

white = 0
black = 0

while True:
	game = chess.pgn.read_game(f)
	
	term = game.headers["Termination"]
	#if term in ["Normal", "Time forfeit", "Abandoned", "Rules infraction", "Unterminated"]:
	if term != "Normal":
		#if term not in ["Time forfeit"]:
			#print(term)
		continue
	
	result = game.headers["Result"]
	
	if result not in ["1-0", "0-1"]:
		continue
	
	lastmove = list(game.mainline())[-1]
	
	# Avoid simulating the game if it is a checkmate
	if lastmove.san().endswith("#"):
		continue
		
	board = game.board()
	for move in game.mainline_moves():
		board.push(move)
	
	info = engine.analyse(board, chess.engine.Limit(time=0.1))
	#print(info)
	score = info["score"]
	if score.is_mate():
		#print(lastmove.san())
		continue
	
	newmin = False
	if result[0] == "1":
		# black resigned
		if score.black().cp > black:
			black = score.black().cp
			newmin = True
	else:
		# white resigned
		if score.white().cp > white:
			white = score.white().cp
			newmin = True
			
	if newmin:
		print(game.headers)
		print(score, result, white, black)
		print(board)
		print(board.fen())
    
"""

board = chess.Board()
while not board.is_game_over():
    result = engine.play(board, chess.engine.Limit(time=0.1))
    board.push(result.move)
    print(board)

engine.quit()
"""