Search found 7735 matches

by Dann Corbit
Tue Mar 26, 2019 2:57 am
Forum: Computer Chess Club: General Topics
Topic: Revisiting g5 (Tough Tactical Test Position?)
Replies: 33
Views: 802

Re: Revisiting g5 (Tough Tactical Test Position?)

A bit longer run, seems about like the others to me: Searching: r1bq2rk/2p4n/1p1p1npb/pN1Pp2p/1PP1Pp1P/P4N2/2BBQPP1/RR3K2 w - - 0 1 infinite: 0 time: 0 increment: 0 moves to go: 0 1 +1.00 00:00 7040 Kg1 2 +1.08 00:00 42223 bxa5 bxa5 3 +0.53 00:00 66639 bxa5 bxa5 c5 4 +0.42 00:00 106114 bxa5 bxa5 c5 ...
by Dann Corbit
Tue Mar 26, 2019 1:55 am
Forum: Computer Chess Club: General Topics
Topic: Revisiting g5 (Tough Tactical Test Position?)
Replies: 33
Views: 802

Re: Revisiting g5 (Tough Tactical Test Position?)

Analysis with Thotfish New game Line r1bq2rk/2pn3n/1p1p2pb/pN1Pp2p/1PP1Pp1P/P4N2/2BBQPP1/RR3K2 b - - 0 1 1...Ndf6 2.Qd3 g5 3.bxa5 bxa5 4.Nbd4 gxh4 5.Nc6 Qe8 6.Nxh4 Rg4 7.Nf3 Qg8 8.Ne7 Qg7 9.Nxc8 Rxc8 10.Nh2 Rh4 11.Nf3 Rg4 The position is equal: = (0.00) Depth: 35/53 00:06:39 4108MN, tb=848 (, 26.03...
by Dann Corbit
Tue Mar 26, 2019 12:03 am
Forum: Computer Chess Club: General Topics
Topic: Revisiting g5 (Tough Tactical Test Position?)
Replies: 33
Views: 802

Re: Revisiting g5 (Tough Tactical Test Position?)

Last iteration: r1bq2rk/2pn3n/1p1p2pb/pN1Pp2p/1PP1Pp1P/P4N2/2BBQPP1/RR3K2 b - - acd 43; ce 189; acs 3600; acn 34086000; pv g5 Ke1 g4 Ng1 Ba6 g3 Bxb5 cxb5 f3 Qd1 Bxd2+ Qxd2 Qf6 Kf1 Ra7 Qc3 Qh6 Re1 Nhf6 Rad1 Rga8 Rd3 axb4 axb4 Nh7 Qb2 Ndf6 Bb1 Qg7 Rc3 Ne8 Qc1 Qd7 Bd3 Nhf6 Rc6 Qg7 Bb1 Ra4 Qb2 Qh6 Re3 K...
by Dann Corbit
Mon Mar 25, 2019 11:34 pm
Forum: Computer Chess Club: General Topics
Topic: Revisiting g5 (Tough Tactical Test Position?)
Replies: 33
Views: 802

Re: Revisiting g5 (Tough Tactical Test Position?)

It does not appear to me that Kf1 saves the day (position after Kf1): Searching: r1bq2rk/2pn3n/1p1p2pb/pN1Pp2p/1PP1Pp1P/P4N2/2BBQPP1/RR3K2 b - - 0 1 infinite: 0 time: 0 increment: 0 moves to go: 0 1 -0.21 00:00 1710 Nhf6 2 -0.67 00:00 20811 Ba6 Kg1 3 -0.57 00:00 40357 Ndf6 bxa5 bxa5 4 -0.60 00:00 62...
by Dann Corbit
Mon Mar 25, 2019 10:47 pm
Forum: Chess Players Forum
Topic: Looking for New In Chess Magazine 1999/5
Replies: 6
Views: 126

Re: Looking for New In Chess Magazine 1999/5

8/3R3R/4k1p1/2p3P1/1p6/1P2NK2/P7/q7 b - - acd 23; acs 60; bm Qh1+; ce -32745; dm -11; pm Qh1+; pv Qh1+ Rxh1 Kxd7 Rh6 c4 Nxc4 Kc6 Rxg6+ Kd7 Rd6+ Kc7 g6 Kc8 g7 Kc7 g8=Q Kb7 Qg7+ Kc8 Nb6+ Kb8 Rd8+; 8/7R/4k1p1/2pR2P1/1p6/1P2NK2/P7/q7 w - - acd 25; acs 60; bm Rdd7; c3 "Rdd7"; ce 32744; dm 12; pm Rdd7; p...
by Dann Corbit
Mon Mar 25, 2019 6:19 pm
Forum: Computer Chess Club: General Topics
Topic: Revisiting g5 (Tough Tactical Test Position?)
Replies: 33
Views: 802

Re: Revisiting g5 (Tough Tactical Test Position?)

Thanks to everyone for all the excellent help, especially since my Stockfish process crashed 17 hours into the analysis. Interestingly, Sting may have found a new counter to Rg8 (answer with Kf1), though I am not sure you can trust it because Sting does not get very deep and the score was still fall...
by Dann Corbit
Sat Mar 23, 2019 5:48 am
Forum: Computer Chess Club: General Topics
Topic: Four trivial mates
Replies: 0
Views: 138

Four trivial mates

Here are four trivial mate positions: 8/8/R5n1/4k3/3R4/4K3/b5B1/8 w - - acn 13735292; acs 14; bm Rg4; ce 32754; dm 7; pv Rg4 Ne7 Re4+ Kf5 Rxe7 Bd5 Bxd5 Kg5 Rg7+ Kh5 Bf7+ Kh4 Rh6#; 8/2n3B1/8/3k1K2/4R3/8/8/2R3b1 w - - acn 14160660; acs 15; bm Re7; ce 32754; dm 7; pv Re7 Nb5 Re5+ Kd6 Rxb5 Bh2 Rb7 Bg3 B...
by Dann Corbit
Sat Mar 23, 2019 12:35 am
Forum: Computer Chess Club: General Topics
Topic: Revisiting g5 (Tough Tactical Test Position?)
Replies: 33
Views: 802

Re: Revisiting g5 (Tough Tactical Test Position?)

Unless you chase it all the way to checkmate, there is never a "once and for all" for positions like these. However, I am going to analyze these two positions for 30 hours each over the weekend (actually for 108000801 milliseconds, since it is such a nice looking number): r1bq1r1k/2pn3n/1p1p3b/pN1Pp...
by Dann Corbit
Sat Mar 23, 2019 12:18 am
Forum: Computer Chess Club: General Topics
Topic: Revisiting g5 (Tough Tactical Test Position?)
Replies: 33
Views: 802

Re: Revisiting g5 (Tough Tactical Test Position?)

If you have trouble reproducing my results at the same time control (23:30sec/pos) and thread count (11), with 16 GB hash, I also analyzed the full set you sent at 36 plies backwards and forwards twice, to load up the hash table before I started that run. That changes the analysis a lot. Here is the...