Re: For how long will Stockfish be competitive versus the best NN ?
Posted: Wed Apr 29, 2020 6:33 pm
Possibly a lucky run. SF's eval was stuck at -2.00 from depth 40-ish to depth 70 where it suddenly started failing high.zullil wrote: ↑Wed Apr 29, 2020 12:27 pmI'm also surprised, but maybe drewdrew got some benefit from having 384 threads and 128 GB hash.Zenmastur wrote: ↑Wed Apr 29, 2020 4:18 amI'm surprised! I tried this and it takes way too long better to use 7-man for a position like this.drewdrew wrote: ↑Wed Apr 29, 2020 3:51 amNo, only 6-men syzygy.zullil wrote: ↑Wed Apr 29, 2020 2:45 amUsing 7-man endgame tables?drewdrew wrote: ↑Wed Apr 29, 2020 2:13 amUnassisted Stockfish-dev (old-ish version):Zenmastur wrote: ↑Mon Apr 27, 2020 7:15 pmGreater than +4 for black.zullil wrote: ↑Mon Apr 27, 2020 5:58 pmCan you give some idea of what "a moderately large number" might be? An unassisted Stockfish-dev search yielded 2.91 in favor of Black.Zenmastur wrote: ↑Sun Apr 26, 2020 7:53 pm
I think this position is a better test and I would certainly like to see your analysis of it. I originally thought this would be a “hard” test, but now I'm not so sure how hard it is. I think “most” (meaning 50% or more) ICCF 2200 players can/would solve this if it occurred in one of their games.
[d]4r3/5pk1/1q1r1p1p/1p1Pn2Q/1Pp4P/6P1/5PB1/R3R1K1 b - -
Jdart posted this position and Dann Corbit analyzed it to depth 74 and concluded it's probably a draw. So, much for big hardware and unassisted analysis. I analyzed it and concluded black wins. If a position like this occurred in a CC and you were playing black could you win it?
I'm very interested in seeing your analysis of this position.
Regards,
Zenmastur
info depth 72 seldepth 111 multipv 1 score cp 433 nodes 8708473100400 nps 374666434 hashfull 953 tbhits 21101722591 time 23243270
My unassisted search (using 6-man tables) reached depth 89 but the eval was only -2.91. Following that with a bit of forward/backward searching, I got the root evaluation to -3.38. And then I gave up.