Search found 3113 matches

by Eelco de Groot
Fri Sep 27, 2019 1:21 am
Forum: Computer Chess Club: General Topics
Topic: What was the last good Stockfish?
Replies: 42
Views: 10741

Re: What was the last good Stockfish?

Well, yes, but sometimes even the Stockfish can be beaten by something that has all its evaluation parameters out of whack. And sometimes that thing can even win a match that it should not win by any logical statistics. Like it did here: Stockfish 2019-09-16 No Contempt - Bluefish 2019-09-25 No Cont...
by Eelco de Groot
Thu Sep 26, 2019 1:13 pm
Forum: Computer Chess Club: General Topics
Topic: Is Black's compensation after 16. g3 really sufficient?
Replies: 15
Views: 3060

Re: Is Black's compensation after 16. g3 really sufficient?

Hi guys, yes that is right, Shredder's way of indicating a "jump out of the search window" by a Fail Low or a Fail High. Other GUIs do that a bit differently sometimes. Stockfish for a while gave really long PVs even in case of a FL or FH but the moves are often very imprecise in such cases (*), eve...
by Eelco de Groot
Wed Sep 25, 2019 4:19 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish 190826_dll_fix
Replies: 1
Views: 612

Re: Stockfish 190826_dll_fix

The Stockfish binary sent in for TCEC was using a Windows dll ("dynamically linked library") that turned out to have a bug. The bug was somewhat noticed before by CoffeeOne in Stockfish team but it was not realized it was in the dll. Stockfish became unresponsive twice. If it had had three hangs it ...
by Eelco de Groot
Wed Sep 25, 2019 12:07 pm
Forum: Computer Chess Club: General Topics
Topic: Is Black's compensation after 16. g3 really sufficient?
Replies: 15
Views: 3060

Re: Is Black's compensation after 16. g3 really sufficient?

I let the search continue a little bit. For Stockfish I think the main line after Deep Junior's B sac is still a draw. White about 1½ pawn up but this advantage isn't growing anymore. Of course it is possible that Stockfish misses something. I would like to test the small change to Stock but I can't...
by Eelco de Groot
Tue Sep 24, 2019 4:04 pm
Forum: Computer Chess Club: General Topics
Topic: Is Black's compensation after 16. g3 really sufficient?
Replies: 15
Views: 3060

Re: Is Black's compensation after 16. g3 really sufficient?

Stockfish with a small change predicts 19.Nd1 and then 19...Nh2 even from move 11 after 2 minutes correctly predicting the lines after the Bishop sac as played in the match but deviating with 16.g3. So not so much 19.f5 from the diagram. rnbqr1k1/pp3ppp/2p2n2/3p4/3P4/P1NBP3/1PQ1NPPb/R1B2RK1 w - - 38...
by Eelco de Groot
Thu Sep 19, 2019 6:27 am
Forum: Computer Chess Club: General Topics
Topic: That Mate in 5 again
Replies: 3
Views: 606

That Mate in 5 again

Latest Stockfish Dev (2019-09-16, one thread, own compile, no tablebases). It's a monster :mrgreen: Oh well, at least it is getting there, currently failing high for the eleventh time and searching with a reduced depth of 67 plies. Ten hours and counting. rk6/p1r3p1/P3B1Kp/1p2B3/8/8/8/8 w - - Engine...
by Eelco de Groot
Wed Sep 18, 2019 7:42 pm
Forum: Computer Chess Club: General Topics
Topic: Testposition EET/002
Replies: 1
Views: 419

Re: Testposition EET/002

Probably the use of tablebases? There are more winning moves but without tablebases most of the time Stockfish latest version plays 1...g5 Only some Fail Highs for 1..h5 but not played in a full PV 8/p5pp/3k1p2/3p4/1P3P2/P1K5/5P1P/8 b - - Engine: Dev 20190916 (512 MB) by T. Romstad, M. Costalba, J. ...
by Eelco de Groot
Tue Sep 17, 2019 6:51 pm
Forum: Computer Chess Club: General Topics
Topic: Analyzing a position Ding-Firouzja wcup19
Replies: 5
Views: 839

Re: Analyzing a position Ding-Firouzja wcup19

Don't think there is much going on in the position, not that I can see. Old Ancalagon only gives +0.08 everywhere, this was pre contempt, I believe it had something to do with the side to move bonus but I'm nor sure anymore. Or was it a primitive contempt bonus? But that was the most interesting thi...
by Eelco de Groot
Tue Sep 10, 2019 4:39 am
Forum: Computer Chess Club: General Topics
Topic: Is this position a win for white?
Replies: 22
Views: 3893

Re: Is this position a win for white?

Maybe we can look at the position again, with some improved programming in more than a year and a half and some people with very big machines :)? Maybe see new things as requested also here http://www.talkchess.com/forum3/viewtopic.php?f=2&t=69361&start=70#top The questions still pending for these p...
by Eelco de Groot
Fri Sep 06, 2019 8:08 am
Forum: Computer Chess Club: General Topics
Topic: Crash by Crystal v1.1
Replies: 11
Views: 1612

Re: Crash by Crystal v1.1

Very preliminary report. Crystal v1.1 (bench 7410759) segfaulted: kernel: [84966.051797] crystal[26855]: segfault at b3a0000017d ip 000000000042095f sp 00007f4342fc6490 error 4 in crystal[400000+3e000] Using 16 threads, 16384 MB hash, all other settings at default. Linux. [EDIT] Was actually using ...