Re:The neural network of the Stockfish chess engine
by V-2 on Wednesday January 13, 2021 @04:54AM
(#25760089)
Right, that would make more sense to me. Although it should be stressed that neither threefold repetition nor the 50-move rule work automatically. They need to be claimed by one of the players. If neither player does, the game can go on.
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Re:The neural network of the Stockfish chess engine
by jstanley on Wednesday January 13, 2021 @05:42AM
(#25760377)
The 75-move rule does work automatically though, so the game is still finite.
Re:The neural network of the Stockfish chess engine
by V-2 on Wednesday January 13, 2021 @09:45AM
(#25762554)
Frankly, I wasn't aware of the 75-move rule! This indeed caps the length of possible games.
The threefold repetition rule doesn't have an equivalent (there's no, say, "fivefold repetition" draw that could be enforced despite the players' will), but it's really irrelevant from the perspective of solving chess, because there's no point in analyzing what happens if game goes through the same loop 1, 10 or 100 times.
And the 75-move rule sets a hard limit anyway, so you couldn't loop infinitely, even if it mattered.
Re:The neural network of the Stockfish chess engine
by harryposner on Wednesday January 13, 2021 @11:27AM
(#25764192)
> there's no, say, "fivefold repetition" draw that could be enforced despite the players' will
There is exactly such a rule. See the FIDE Laws of Chess [0], rule 9.6.1.
Re:The neural network of the Stockfish chess engine
by anandoza on Wednesday January 13, 2021 @11:06AM
(#25763846)
Lichess.org actually does have a 5fold repetition rule that applies without players claiming it -- https://lichess.org/faq#threefold
Kind of funny that your hypothetical example was exactly reality in this case.