Search found 7814 matches

by Dann Corbit
Thu Apr 25, 2019 10:46 pm
Forum: Computer Chess Club: General Topics
Topic: Sapeli 1.0 - New chess engine
Replies: 18
Views: 1088

Re: Sapeli 1.0 - New chess engine

A primitive compile using make

I had to change some of the macros to make it compile.
by Dann Corbit
Wed Apr 24, 2019 6:42 pm
Forum: Computer Chess Club: General Topics
Topic: Vachier-Lagrave - Naiditsch, GRENKE 2019 R3 : 25.Nf6+ !
Replies: 4
Views: 331

Re: Vachier-Lagrave - Naiditsch, GRENKE 2019 R3 : 25.Nf6+ !

Upon analyzing the position after making the key move, it seems the actual advantage is very small. I guess that the real truth for this position lies more than 60 plies away. Searching: rn2kr2/1pp1b1p1/4pN2/1Pp1P2p/p1P2P1P/P7/1B4P1/3RR1K1 b - - 0 1 infinite: 0 time: 0 increment: 0 moves to go: 0 1 ...
by Dann Corbit
Tue Apr 23, 2019 6:20 pm
Forum: Computer Chess Club: General Topics
Topic: New results in the ERET chess test
Replies: 11
Views: 505

Re: New results in the ERET chess test

I assume that Lela is 2 GPU not 2 CPU. Is that correct?
by Dann Corbit
Tue Apr 23, 2019 6:17 pm
Forum: Computer Chess Club: General Topics
Topic: Middlegame positional test-suite
Replies: 20
Views: 1674

Re: Middlegame positional test-suite

... Stockfish finds this for me in about a minute using ten threads. It pretty well sticks with it and seems to be clearly best. 1r3bk1/rnR2p1p/pp2pnp1/3p4/3P4/1P2PB1P/P2BNPP1/R5K1 w - - acd 40; acs 433; bm a4; c3 "a4"; cce 0; ce 45; id "midgames.210"; pm a4; pv a4 Raa8 Kf1 h5 Rc2 a5 Nf4 Nd6 Nd3 Rc...
by Dann Corbit
Tue Apr 23, 2019 8:45 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: 7-man Syzygy support in Fathom
Replies: 7
Views: 291

Re: 7-man Syzygy support in Fathom

I have pushed a branch with changes to support 7-man tbs, here: https://github.com/jdart1/Fathom/tree/7man {snip} I am going to do a little more testing and cleanup before merging into the main branch. Feedback/additional testing welcome. --Jon Thank you for this marvelous effort, so that others ca...
by Dann Corbit
Sun Apr 21, 2019 8:11 pm
Forum: Computer Chess Club: General Topics
Topic: What CPU or GPU has the best time to depth?
Replies: 4
Views: 308

Re: What CPU or GPU has the best time to depth?

I am wondering what setup would give the best time to depth for infinite analysis. I hear a lot about fewer but faster cores. Also, how does lczero in compare with SF in time to depth? Depths reported by LC0 are much lower than those reported by Stockfish. So the depth figure tells you very little....
by Dann Corbit
Fri Apr 19, 2019 5:31 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: SMP, game struct, thread struct and MakeMove
Replies: 6
Views: 309

Re: SMP, game struct, thread struct and MakeMove

If your functions are re-entrant, you should not need more than one. Sorry Dann, I do not know what a re-entrant function means. There are functions that carry state from the caller and rely on that behavior or that keep an internal object and return a pointer to it or things of that nature. An exa...
by Dann Corbit
Fri Apr 19, 2019 12:49 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: SMP, game struct, thread struct and MakeMove
Replies: 6
Views: 309

Re: SMP, game struct, thread struct and MakeMove

If your functions are re-entrant, you should not need more than one.
by Dann Corbit
Wed Apr 17, 2019 7:16 pm
Forum: Computer Chess Club: General Topics
Topic: Middlegame positional test-suite
Replies: 20
Views: 1674

Re: Middlegame positional test-suite

This is the current set of midgames position for which the best move calculated by computer does not match the given solution. I have hardened the positions by deeper analysis, and will make additional deepening runs. In each case, the field c3 holds the proposed solution from the test set. 2r2rk1/1...
by Dann Corbit
Wed Apr 17, 2019 6:24 pm
Forum: Computer Chess Club: General Topics
Topic: The problem with adjudication based on score
Replies: 26
Views: 1427

Re: The problem with adjudication based on score

jp wrote:
Wed Apr 17, 2019 12:42 pm
Dann Corbit wrote:
Wed Apr 17, 2019 12:26 am
7r/6p1/7P/p1r1p1k1/Pp1pPp2/1PpP1Pp1/2P3P1/K6R w - -
Dann, who first came up with this position?
Gurgenidse, Dawid
Die Schwalbe (10693) 2000

From Yacpdb:
http://www.yacpdb.org/#search/N3I2cDE3U ... LzEvMA==/1