Re: AlphaZero No Castling Chess
Posted: Fri Dec 06, 2019 7:51 pm
Ah, forgot about that, I deselected the 50 move rule too in the GUI.lkaufman wrote: ↑Fri Dec 06, 2019 6:31 pmWait a minute, no draws? I thought this version eliminated draws by stalemate, bare king, and rep, but not fifty move rule. Surely there should be some fifty move rule draws in forty games? Unless the engine was just forfeiting players for repeating, rather than forcing them to play moves that did not repeat. It would be just incredible if my three rule changes reduced the draw percentage to less than 2%, rather I should say unbelievable. Or is this version calling fifty move rule draws wins for Black (my alternate proposal)?Laskos wrote: ↑Fri Dec 06, 2019 5:51 pmThanks, seems to be playing relatively fine, but I saw only 2-3 games. In 40 games 2 min + 2 s versus 1 min + 1 s the score was 27:13 (only wins and losses, as it should be), in line with the Elo gain for doubling time control of the Standard Chess. So, the game is playable and is sensitive to the strength.MTaktikos wrote: ↑Fri Dec 06, 2019 5:17 pmNo the eval is not specially tweaked for this variant.Laskos wrote: ↑Fri Dec 06, 2019 3:16 pm
Thanks, seems to work now. Will check for some properties, interesting. Does the engine know something how to play it, or it plays as usual, only discovering that it lost/won at the last move? I have no time looking at PGNs and games.
I mean, the eval has to be changed due to such adjudication rules, otherwise it will play dumb, unrepresentative games. I don't have time to look at the code, games and PGNs, just left it play 40 games at 2:1 time odds, to see the sensitivity of the game to strength.
But I have seen Fairy Stockfish playing other 8x8 variants without tweaked eval, and nevertheless it plays much stronger (> 400 Elo) than known variant engines, which themselves play at superhuman level. Therefore I don't assume that it will play dumb
P.S. After this weekend I will try to change variants.cpp so that Fairy Stockfish can be tested also for Armageddon chess