Search found 3016 matches

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: 4
Views: 330

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: 4
Views: 330

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: 4
Views: 330

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: 1002

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...
by Eelco de Groot
Sat Apr 13, 2019 9:26 am
Forum: Computer Chess Club: General Topics
Topic: Fun mate in 10
Replies: 4
Views: 462

Re: Fun mate in 10

There's a Mate in 7 also I think :)
by Eelco de Groot
Tue Apr 09, 2019 3:26 am
Forum: Computer Chess Club: General Topics
Topic: Best move?
Replies: 4
Views: 371

Re: Best move?

The situation at depth 59 was about the same for the 5 best moves. 9. h4 got a little better, 9. c3 dropped out and in its stead came 9 Bb5. r1bqk2r/ppp2p2/2np1n2/2b1p1pp/2B1P3/3P1NB1/PPP2PPP/RN1Q1RK1 w kq - Engine: Kaissa IV (512 MB) by T. Romstad, M. Costalba, J. Kiiski, G. Linscott 59 2485:00+1.2...
by Eelco de Groot
Sun Apr 07, 2019 4:39 pm
Forum: Computer Chess Club: General Topics
Topic: Best move?
Replies: 4
Views: 371

Re: Best move?

If we can believe Kaissa (still very buggy IV, but maybe just a bit less because of synergy of bugs with the new Stockfish code) analysis, it has shown by now that 9. h4 is in fact the only playable move for White. So you only have to refute one move and Robin Smith would still be right. Or even if ...
by Eelco de Groot
Wed Apr 03, 2019 1:27 pm
Forum: Computer Chess Club: General Topics
Topic: A position that white might win
Replies: 8
Views: 429

Re: A position that white might win

Hi Louis, thanks! I guess without tablebases the win is invisible at least to CFish and Stockfish. With CFish not more than 1.12 at shallow depths, so in that respect Kaissa is not so bad :) 32.f5 gxf5 33.Qg5+ Kh8 34.Qh6 Qxd3 35.Ng5 f4 36.Rxc3 Qg6 37.Qxg6 hxg6 38.Nxf7+ Kg8 39.Rxc7 Rxc7 6k1/2r2N2/1p2...
by Eelco de Groot
Wed Apr 03, 2019 11:09 am
Forum: Computer Chess Club: General Topics
Topic: A position that white might win
Replies: 8
Views: 429

Re: A position that white might win

Old Kaissa III would prefer 33...Kh8 instead of going to f8 and the score does not rise so much anymore. But it probably means not so much and also no tablebases were used. 2r3k1/2r2p1p/1p2p1p1/p2pP3/2q2P1P/2nN1N2/3Q2P1/2R1R1K1 w - - Engine: Kaissa III (512 MB) by T. Romstad, M. Costalba, J. Kiiski,...
by Eelco de Groot
Tue Apr 02, 2019 2:49 am
Forum: Chess Players Forum
Topic: Problem accessing sites
Replies: 8
Views: 536

Re: Problem accessing sites

Thanks, that is interesting, did not know that you could do that.