Search found 3052 matches

by Eelco de Groot
Wed May 15, 2019 11:53 am
Forum: Computer Chess Club: General Topics
Topic: Little thought experiment
Replies: 10
Views: 1179

Re: Little thought experiment

SF EF does not seem to do any extensions either it seems, apart from not reducing or pruning. The search horizon is only 7½ full moves. That is not enough to overcome serious horizont effects. I think it would play weakly. It is totally a guess but at first glance I'd say would be easily crushed by ...
by Eelco de Groot
Wed May 08, 2019 10:12 pm
Forum: Computer Chess Club: General Topics
Topic: A tough nut to crack
Replies: 5
Views: 634

Re: A tough nut to crack

Backwards from your pgn Dann at move 65 Stock gives a Mate in 17 instead of 25 so that is already a shortcut 8/6p1/8/8/2pp2Q1/1p6/pppp2K1/br2k2n w - - Engine: Stock Dev 2019-05-05 (512 MB) by T. Romstad, M. Costalba, J. Kiiski, G. Linscott 69/34 0:01 +M17 65.Qh4+ Ke2 66.Qh5+ Ke1 67.Qxh1+ Ke2 68.Qh5+...
by Eelco de Groot
Mon May 06, 2019 6:04 pm
Forum: Computer Chess Club: General Topics
Topic: How to equalize in 6.h3 Sicilian Najdorf (Adams Attack)?
Replies: 11
Views: 1127

Re: How to equalize in 6.h3 Sicilian Najdorf (Adams Attack)?

@Eelco, in the line: ...e5 2.Nde2 b5 3.g4 b4 4.Nd5 Nxd5 5.Qxd5 Ra7 6.Be3 Be6 7.Qd2 Rd7 8.Qxb4 d5 9.Qa4 Be7 10.c3 Bg5 11.O-O-O Bxe3+ 12.fxe3 O-O 13.Bg2 dxe4 14.Qxe4 Qa5 White has much stronger Ng3 instead of g4. And now it's problem for Black, cause this horsy can jump into f5. There are games with ...
by Eelco de Groot
Mon May 06, 2019 1:49 am
Forum: Computer Chess Club: General Topics
Topic: How to equalize in 6.h3 Sicilian Najdorf (Adams Attack)?
Replies: 11
Views: 1127

Re: How to equalize in 6.h3 Sicilian Najdorf (Adams Attack)?

So, the main lines are: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 e5 7. Nde2 h5 8. g3 Be7 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 e6 7. g4 h6 8. Bg2 Be7 I'll take a look a this 6...e6 7.g4 h6 stuff now... 6...h6 (h6 and e6 can transpose as can other moves I think) ...
by Eelco de Groot
Fri May 03, 2019 10:38 am
Forum: Computer Chess Club: General Topics
Topic: Pause calculation / analysis engines
Replies: 19
Views: 1147

Re: Pause calculation / analysis engines

Yes, that is what I meant Harm, I edited my post a little when I saw it was confusing. As far as I know, Windows keeps the hash intact although I have not really tested it, I don't play correspondence chess or things like that. But certainly for short perods of time you can do this now. Windows shou...
by Eelco de Groot
Fri May 03, 2019 10:10 am
Forum: Computer Chess Club: General Topics
Topic: Pause calculation / analysis engines
Replies: 19
Views: 1147

Re: Pause calculation / analysis engines

Saving the hash in memory and restarting the analysis after reloading it is not the same as continuing the analysis undisturbed. If you are satisfied with that you might as well just have terminated the analysis (but not quit the GUI or unload the engine), and restart the analysis when you are done...
by Eelco de Groot
Wed Apr 24, 2019 9:45 pm
Forum: Computer Chess Club: General Topics
Topic: Vachier-Lagrave - Naiditsch, GRENKE 2019 R3 : 25.Nf6+ !
Replies: 9
Views: 997

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

New version, not as fast and does more extensions. Bench about double again. Total time (ms) : 1623 Nodes searched : 2128442 Nodes/second : 1311424 rn2kr2/1pp1b1p1/4p3/1Pp1P2p/p1P1NP1P/P7/1B4P1/3RR1K1 w - - Engine: Kaissa IV (search_009, 512 MB) by T. Romstad, M. Costalba, J. Kiiski, G. Linscott 47 ...
by Eelco de Groot
Wed Apr 24, 2019 8:27 pm
Forum: Computer Chess Club: General Topics
Topic: Vachier-Lagrave - Naiditsch, GRENKE 2019 R3 : 25.Nf6+ !
Replies: 9
Views: 997

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

After 1...gxf6 rn2kr2/1pp1b3/4pp2/1Pp1P2p/p1P2P1P/P7/1B4P1/3RR1K1 w - - Engine: Kaissa IV (512 MB) by T. Romstad, M. Costalba, J. Kiiski, G. Linscott 69 4:00 +0.69 2.exf6 Bd6 3.Rd5 Nd7 4.Rxe6+ Kf7 5.Rdxd6 cxd6 6.Re7+ Kg6 7.Rg7+ Kf5 8.Rxd7 Kxf4 9.Kh2 b6 10.Rxd6 Rab8 11.Rd5 Ke4 12.Rxh5 Kd3 13.Rf5 Kxc4...
by Eelco de Groot
Wed Apr 24, 2019 7:51 pm
Forum: Computer Chess Club: General Topics
Topic: Vachier-Lagrave - Naiditsch, GRENKE 2019 R3 : 25.Nf6+ !
Replies: 9
Views: 997

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 Eelco de Groot
Mon Apr 22, 2019 8:22 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish misevaluations:
Replies: 31
Views: 2849

Re: Stockfish misevaluations:

You could patch the eval of Stockfish a little in this particular position by scaling the stronger side down for having all pawns locked (after giving b5). The 'lantern' formation on the right is a well known 'indirectly' blocked formation. But I think it is only cosmetical. Kaissa gives 3.71. If yo...