Search found 3090 matches

by Eelco de Groot
Tue Aug 20, 2019 12:25 am
Forum: Computer Chess Club: General Topics
Topic: MateFinder 9
Replies: 47
Views: 10974

Re: MateFinder 9

Kaissa still needs depth 34 to find it, with one thread, 512 Mb. With only 16 Mb it is a bit slower, depth 39. 36/76 1:53 +M8++ 1.Bd7 (274.642.680) 2429 36/76 1:53 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5 5.Bxc7+ (274.707.943) 2429 37/10 1:53 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5 5.Bxc7+ (275.052.3...
by Eelco de Groot
Mon Aug 12, 2019 6:53 pm
Forum: Computer Chess Club: General Topics
Topic: can Black win this game after 29. Rxb6?! ...
Replies: 6
Views: 1008

Re: can Black win this game after 29. Rxb6?! ...

Black still has a plus, but to me looks like White has reasonable chances to draw, in spite of score, after 30... e5 {instead of 30... a5?} 31. a5 exf4 32. gxf4 Kh7 33. f5 {=+} Kh6 34. Rxa6 Kg5 35. Nd4 2r1r3/6p1/R4p2/P4Pk1/2PN2p1/3P4/5K1P/8 b - - Engine: Kaissa IV NoContempt (not the best version, o...
by Eelco de Groot
Mon Aug 12, 2019 4:06 pm
Forum: Computer Chess Club: General Topics
Topic: can Black win this game after 29. Rxb6?! ...
Replies: 6
Views: 1008

Re: can Black win this game after 29. Rxb6?! ...

Hi guys, I think Black wins it fairly easily from Dan's position on :P I did a simple shootout, only 30 plies fixed depth. Sometimes the extensions run away (this not a very good version for controlling depths) and a 40 ply deep search can go for 900 minutes, for just one move. Shootout begun at hig...
by Eelco de Groot
Wed Aug 07, 2019 3:54 pm
Forum: Computer Chess Club: General Topics
Topic: New Kaissa based on the 12.52 Elo gain Stockfish
Replies: 0
Views: 1329

New Kaissa based on the 12.52 Elo gain Stockfish

The big search tuning patch was tested at VLTC ELO: 12.52 +-2.6 (95%) LOS: 100.0% Total: 19291 W: 3119 L: 2424 D: 13748 20000 @ 180+1.8 th 1 VLTC to see how this big param tune scales after LTC (since tune was done at ltc). See discussion at https://github.com/official-stockfish/Stockfish/pull/2260 ...
by Eelco de Groot
Mon Aug 05, 2019 4:45 am
Forum: Computer Chess Club: General Topics
Topic: Diemer vs Trommsdorf 1973
Replies: 8
Views: 1274

Re: Diemer vs Trommsdorf 1973

Off topic, is Diemer the one from the Blackmar-Diemer gambit? Nice picture of two other chess players, a very young Jan Timman and almost just as young Boris Spasski, 10 october 1977 at Elsevier publishing company. I don't remember this particular match, I do remember an earlier match after Korchnoi...
by Eelco de Groot
Mon Aug 05, 2019 4:24 am
Forum: Computer Chess Club: General Topics
Topic: Diemer vs Trommsdorf 1973
Replies: 8
Views: 1274

Re: Diemer vs Trommsdorf 1973

61.7% chance of win is not so bad. Black's doubled pawn does not look so strong, so white N against pawn or against two pawns, maybe some of those positions should be won. For instance at the end of some PVs 8/p7/8/2bppk2/1p1p4/1P6/P1P1N3/2BK4 b - - in one line is at least +1.00 8/p7/8/2bppk2/1p1p4...
by Eelco de Groot
Sun Aug 04, 2019 5:29 pm
Forum: Computer Chess Club: General Topics
Topic: About stockfish's optimizing for bullet
Replies: 10
Views: 2171

Re: About stockfish's optimizing for bullet

Most eval tests are better off with better statistical certainty of more tests than longer time controls, IMO, at least I think for most of SF eval, I can't remember things that were especially bad at long timecontrols, I have never really looked for such eval for LTC myself but I also don't remembe...
by Eelco de Groot
Sun Aug 04, 2019 2:00 pm
Forum: Computer Chess Club: General Topics
Topic: Diemer vs Trommsdorf 1973
Replies: 8
Views: 1274

Re: Diemer vs Trommsdorf 1973

61.7% chance of win is not so bad. Black's doubled pawn does not look so strong, so white N against pawn or against two pawns, maybe some of those positions should be won. For instance at the end of some PVs 8/p7/8/2bppk2/1p1p4/1P6/P1P1N3/2BK4 b - - in one line is at least +1.00 8/p7/8/2bppk2/1p1p4/...
by Eelco de Groot
Thu Aug 01, 2019 4:32 pm
Forum: Computer Chess Club: General Topics
Topic: Spielmann vs Wolf 1922
Replies: 9
Views: 1416

Re: Spielmann vs Wolf 1922

After 20...exd4 maybe more interesting? Kaissa thinks it is about 1.2 at the moment just running in Multi PV. 21. e5 only move, or 21. Qxd4 for draw, other moves Black gets an advantage. r3r1k1/p2n1pp1/1pb2q1p/8/3pP3/3Q1N2/P1B2PPP/R3R1K1 w - - Engine: Kaissa IV NoContempt (one thread only, no tableb...
by Eelco de Groot
Tue Jul 30, 2019 11:12 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: SF' MidgameLimit & EndgameLimit ?
Replies: 2
Views: 1259

Re: SF' MidgameLimit & EndgameLimit ?

It is best to look this up in the code itself. I'm not sure about the details but roughly, Stockfish varies its evaluation factors between a weight for the endgame and a weight for the midgame. How much of each is determined by the game phase. Between midgamelimit and endgamelimit there is a linear ...