Search found 215 matches

by lantonov
Thu Feb 19, 2015 11:19 am
Forum: Computer Chess Club: General Topics
Topic: The strongest passer
Replies: 56
Views: 9323

Re: The strongest passer

The second diagram strongly favours Black and SF thinks this too: 27 -1.06 177.6M 2:15.59 Ne3 Nb6 Reb1 a4 Bd1 a3 Bxb3 cxb3 Rxb3 Nc4 Qd3 Nxe3 Bxe3 Rfb8 Rxb8+ Rxb8 Bg5 h6 Bxe7 Qxe7 c4 dxc4 Qxc4 Rb2 Qa4 Nb5 d5 exd5 Qa8+ Qf8 Qxd5 Nc3 Qd3 Ne2+ Kf1 26 -1.07 146.8M 1:51.05 Ng5 Nb6 Qc1 a4 Qb1 Bxg5 Bxg5 a3 B...
by lantonov
Thu Feb 19, 2015 11:05 am
Forum: Computer Chess Club: General Topics
Topic: The strongest passer
Replies: 56
Views: 9323

Re: The strongest passer

After Bxa4 SF thinks that White is about half a pawn ahead, with many fail-lows and fail-highs though. White generally avoids the position with the b3 passer. 35 +0.51? 916.0M 11:37.27 bxa4 Nxa4? 35 +0.57! 894.3M 11:19.79 bxa4! 34 +0.45? 827.2M 10:24.50 bxa4 Nxa4? 34 +0.51! 811.2M 10:12.47 bxa4! 33 ...
by lantonov
Thu Feb 19, 2015 10:47 am
Forum: Computer Chess Club: General Topics
Topic: The strongest passer
Replies: 56
Views: 9323

Re: The strongest passer

SF latest dev version (17/02/2015) is clearly struggling here and can find nothing but a draw: 29 0.00 311.9M 3:51.67 Rfd8 Ne3 Qe8 Ng4 Qf8 h4 Kh8 Bg5 Rd7 Bxe7 Rxe7 Ne3 Qb8 Ng4 Qf8 29 0.00? 223.4M 2:44.31 Qd8 h4? 28 +0.05 182.7M 2:12.80 Qd8 Bg5 Bb7 Qf4 Bxg5 Nxg5 h6 Nf3 Ba6 Ne3 Qe7 Rac1 Rfd8 Qg3 Qf8 Q...
by lantonov
Wed Feb 11, 2015 2:33 pm
Forum: Computer Chess Club: General Topics
Topic: En passant bonus
Replies: 29
Views: 3981

Re: En passant bonus

I do not quite understand what rank 4 and rank 5 mean. From white's point of view, the bonus should be due to any pawn on the 5th rank, with an enemy pawn on the 7th to the left or to the right on adjacent files. This will hold true for both white and black. The 7th rank is again seen from white's ...
by lantonov
Wed Feb 11, 2015 11:24 am
Forum: Computer Chess Club: General Topics
Topic: En passant bonus
Replies: 29
Views: 3981

Re: En passant bonus

This idea is already running on Fishtest by Vince Negri with attribution to Lyudmil Tsvetkov and passed STC (short-time control) convincingly. Doesn't it go for Black too (black pawn on rank 4 and white en-passant pawn on rank 2) ? Vince implemented a variant of this idea (weaker or stronger, I don'...