Search found 336 matches

by acase
Thu Apr 18, 2019 10:17 pm
Forum: Computer Chess Club: General Topics
Topic: Hard puzzle for stockfish
Replies: 8
Views: 709

Re: Hard puzzle for stockfish

Thanks for the info Mark, check out the story that was posted back in 2002 by Jonas Cohonas from the CCC archives https://www.stmintz.com/ccc/index.php?id=260454 : I found this wonderful position in Peter Durfeld's "Skakmyter" (Chessmyths) And the story is losely translated by me. The story behind i...
by acase
Sun Apr 14, 2019 9:55 pm
Forum: Computer Chess Club: General Topics
Topic: Hard puzzle for stockfish
Replies: 8
Views: 709

Re: Hard puzzle for stockfish

On a second run of the third puzzle (The Georgian Peasant) Stockfish does find the solution with a plus score at about the 20-21 minute mark, and since I let it think while I was at work I came home to see Stockfish announce a Mate in 32. 6N1/3P3k/n2K3p/2p3n1/1b6/2p1p1P1/8/3B4 w - - 0 1 FEN: 6N1/3P3...
by acase
Sun Apr 14, 2019 12:06 am
Forum: Computer Chess Club: General Topics
Topic: Hard puzzle for stockfish
Replies: 8
Views: 709

Re: Hard puzzle for stockfish

6N1/3P3k/n2K3p/2p3n1/1b6/2p1p1P1/8/3B4 w - - 0 1 [Event "Schakend Nederland#2207 (v)"] [Site "?"] [Date "1990.??.??"] [Round "?"] [White "Van Breukelen=G"] [Black "(+0047.24d6h7)"] [Result "1-0"] [SetUp "1"] [FEN "6N1/3P3k/n2K3p/2p3n1/1b6/2p1p1P1/8/3B4 w - - 0 1"] [PlyCount "21"] [EventDate "1990.?...
by acase
Sat Apr 13, 2019 11:10 pm
Forum: Computer Chess Club: General Topics
Topic: Hard puzzle for stockfish
Replies: 8
Views: 709

Re: Hard puzzle for stockfish

The second position is also easily solved by Stockfish: FEN: k7/p7/P5Pp/K4P1P/3p3P/3P4/ppBN1b2/8 w - - 0 1 Stockfish_19041213_x64_bmi2: 1/1 00:00 3k 1,033k -2.24 1.f5-f6 a2-a1Q+ 2.Ka5-b5 Bf2xh4 2/5 00:00 5k 1,692k -2.64 1.g6-g7 a2-a1Q+ 2.Ka5-b4 3/6 00:00 8k 2,550k +3.25 1.g6-g7 a2-a1Q+ 2.Ka5-b4 b2-b...
by acase
Sat Apr 13, 2019 11:03 pm
Forum: Computer Chess Club: General Topics
Topic: Hard puzzle for stockfish
Replies: 8
Views: 709

Re: Hard puzzle for stockfish

8/8/8/2pK3p/8/5N2/1P4pq/5Rbk w - - 0 1 [Event "1.p Molodoj Leninets (Kurgan) (v)"] [Site "?"] [Date "1981.??.??"] [Round "?"] [White "Gurgenidze=D Mitrofanov=L"] [Black "(+3131.13d5h1)"] [Result "1-0"] [SetUp "1"] [FEN "8/8/8/2pK3p/8/5N2/1P4pq/5Rbk w - - 0 1"] [PlyCount "15"] [EventDate "1981.??.??...
by acase
Tue Mar 19, 2019 12:54 am
Forum: Computer Chess Club: General Topics
Topic: Another Brilliancy cooked: Breyer - Esser
Replies: 19
Views: 1287

Re: Another Brilliancy cooked: Breyer - Esser

SF alone finds Bd2 with >+1 score after 8m48s on an i7 6*4GHz. On a second run, SF doesn't find Bd2 :( FEN: rnbq1rk1/p3bp2/2p1p1p1/1p1nP1P1/2pP1P2/2N5/PP4P1/RBBQK2R w KQ - 1 14 On a second run for me Stockfish does find Bd2, but it takes much longer than my first run (~8 minutes on the first run) t...
by acase
Mon Mar 18, 2019 10:45 pm
Forum: Computer Chess Club: General Topics
Topic: Another Brilliancy cooked: Breyer - Esser
Replies: 19
Views: 1287

Re: Another Brilliancy cooked: Breyer - Esser

SF alone finds Bd2 with >+1 score after 8m48s on an i7 6*4GHz. On a second run, SF doesn't find Bd2 :( FEN: rnbq1rk1/p3bp2/2p1p1p1/1p1nP1P1/2pP1P2/2N5/PP4P1/RBBQK2R w KQ - 1 14 Interesting, I think I'll give it another shot with all 20 cores this time with Stockfish and see if it finds it again.
by acase
Sat Mar 16, 2019 7:41 pm
Forum: Computer Chess Club: General Topics
Topic: Another Brilliancy cooked: Breyer - Esser
Replies: 19
Views: 1287

Re: Another Brilliancy cooked: Breyer - Esser

Here is Stockfish Development version from March 5, 2019 after more than 68 hours using 18 of 20 cores on my dual xeon workstation with 16GB hash table: 64/115 68:32:31 6,448,922,912k 26,135k +3.65 1.Bc1-d2 Qd8-e8 2.Nc3-e4 Nb8-d7 3.Ne4-g3 f7-f5 4.g5xf6/ep Rf8xf6 5.e5xf6 Be7xf6 6.Qd1- e2 Qe8-f7 7.Ng3...
by acase
Sat Mar 16, 2019 6:23 pm
Forum: Computer Chess Club: General Topics
Topic: Another Brilliancy cooked: Breyer - Esser
Replies: 19
Views: 1287

Re: Another Brilliancy cooked: Breyer - Esser

With the help of Mc Cain 2 and SF I found 14.Bd4! 3 best moves and eval after this move : rnbq1rk1/p3bp2/2p1p1p1/1p1nP1P1/2pP1P2/2N5/PP1B2P1/RB1QK2R b KQ - 2 14 Stockfish_190305_x64_modern: ... 37/67 05:20 2 649 170 690 8 278 192 +3,51 14. ... Re8 15.Qg4 Bf8 16.Nxd5 cxd5 17.Qh4 Bg7 18.Bb4 Re7 19.Qh...
by acase
Sat Mar 16, 2019 4:24 pm
Forum: Computer Chess Club: General Topics
Topic: Another Brilliancy cooked: Breyer - Esser
Replies: 19
Views: 1287

Another Brilliancy cooked: Breyer - Esser

In this game Breyer played what was thought to be a very nice move at move 14, 14.Kf1, however computers have since busted this move with the defensive resource 14...Qe8!. I do have to point out though that there is a winning move here (at least according to Stockfish) see if your favorite engine ca...