Search found 1557 matches

by Ajedrecista
Thu Apr 15, 2021 8:29 pm
Forum: Computer Chess Club: General Topics
Topic: Who composed this problem?
Replies: 1
Views: 96

Re: Who composed this problem?

Hello Gabor: I did not have success in a fast search. However, I found other problem with similar theme (I suppose it since I have not got access to a chess engine right now) where there is only a difference in the square of the black pawn: g4 instead of c4. That problem is the number 324340 of Yet ...
by Ajedrecista
Tue Apr 13, 2021 7:15 pm
Forum: Computer Chess Club: General Topics
Topic: Can any engine find the winning move here ?
Replies: 32
Views: 906

Re: Can any engine find the winning move here?

Hello: Gusev vs. Auerbach ... once again. Analysed to death, though what a queen sacrifice! [d]4q1kr/p6p/1prQPppB/4n3/4P3/2P5/PP2B2P/R5K1 w - - 1 24 [Event "Molniya Sporting Society"] [Site "Chelyabinsk URS"] [Date "1946.??.??"] [EventDate "?"] [Round "5"] [Result "1-0"] [White "Yuri S Gusev"] [Blac...
by Ajedrecista
Tue Apr 13, 2021 7:07 pm
Forum: Computer Chess Club: General Topics
Topic: Perft 7 -> 1.6 trillion moves
Replies: 3
Views: 467

Re: perft(7) -> 1.6 trillion moves.

Hello: [...] 4r1k1/p4pp1/2n2n1B/2b5/N6Q/P2q1N2/1r4PP/R4R1K b - - 1 23 positions(1) = 79 positions(2) = 3,319 positions(3) = 124,423 positions(4) = 2,859,642 positions(5) = 64,788,485 I can compute the value of position(6) but I ran out of spare time. In view of partial results at 16 steps of calcula...
by Ajedrecista
Mon Apr 12, 2021 7:12 pm
Forum: Computer Chess Club: General Topics
Topic: Perft 7 -> 1.6 trillion moves
Replies: 3
Views: 467

Re: perft(7) -> 1.6 trillion moves.

Hello Mike: I have computed perft(8) value while I confirmed perft(7) of the first position with gperft 1.1 perft counter. I have also computed the number of unique positions with JetChess 1.0.0.0 perft counter. Here are the results: 4r1k1/p4pp1/2n2n1B/2b5/N6Q/P2q1N2/1r4PP/R4R1K b - - 1 23 Depth is ...
by Ajedrecista
Sun Apr 11, 2021 10:46 am
Forum: Computer Chess Club: General Topics
Topic: Unusual imbalance
Replies: 11
Views: 577

Re: Unusual imbalance.

Hello: It is true that an exchange sequence of NNqBBr is not usually seen. But I paid attention on black moves from 13th to 15th (Qd8-c7, Qc7-b6 and Qb6-a5), which reminds me the original moves of the queen ( Wikipedia article on the subject ), which bring back memories of Kasparov - Karpov exhibiti...
by Ajedrecista
Sun Apr 11, 2021 10:04 am
Forum: Computer Chess Club: General Topics
Topic: Bartel- Artemiev Eur OCC 2021 21...Nxh4
Replies: 3
Views: 263

Re: Bartel - Artemiev, Eur OCC 2021 21...Nxh4.

Hello Vincent: Game is here : https://www.chessbomb.com/arena/2021-european-online-club-cup-playoff/03-Bartel_Mateusz-Artemiev_Vladislav Not very hard but SF13 needs depth 26 ! :cry: 21...Nxh4!! [d]r3k2r/1p2q3/p2p4/2p1pnB1/6pP/2NP1bP1/PPPQ1P2/R4RK1 b kq - 1 21 Bf3 + g4 are monsters in this position!...
by Ajedrecista
Sun Apr 04, 2021 10:37 am
Forum: Computer Chess Club: General Topics
Topic: Nice endgame of Gogobello 3.0 (NNUE Revolution) vs. Laser 1.7
Replies: 2
Views: 399

Re: Nice endgame of Gogobello 3.0 (NNUE Revolution) vs. Laser 1.7.

Hello: [Event "NN Test86"] [Site "ISR 3"] [Date "2021.04.04"] [Round "4"] [White "Laser-1_7"] [Black "Gogobello 3.0 x64_bmi2_NNUE_Revolution"] [Result "0-1"] [BlackElo "2200"] [ECO "A00"] [Opening "Dunst (Sleipner-Heinrichsen-Van Geet) Opening"] [Time "11:03:56"] [WhiteElo "2200"] [TimeControl "240+...
by Ajedrecista
Thu Apr 01, 2021 11:25 am
Forum: Computer Chess Club: General Topics
Topic: Initial position -x pieces for black
Replies: 7
Views: 884

Re: Initial position -x pieces for black.

Hello: Hello Jouni: Where is the old "favorite" :) ? 3qk3/8/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 SF 13 with NNUE enabled returns mate in 12 evals for 1.- e4, 1.- Nc3 and 1.- d4 in a fairly short run: FEN: 3qk3/8/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 Stockfish_13_win_x64_modern: [...] 71/28 16:31 5.43...
by Ajedrecista
Mon Mar 29, 2021 7:12 pm
Forum: Computer Chess Club: General Topics
Topic: Initial position -x pieces for black
Replies: 7
Views: 884

Re: Initial position -x pieces for black

Hello Jouni: Where is the old "favorite" :) ? 3qk3/8/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 SF 13 with NNUE enabled returns mate in 12 evals for 1.- e4, 1.- Nc3 and 1.- d4 in a fairly short run: FEN: 3qk3/8/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 Stockfish_13_win_x64_modern: [...] 71/28 16:31 5.432.875.1...
by Ajedrecista
Mon Mar 29, 2021 6:34 pm
Forum: Computer Chess Club: General Topics
Topic: Initial position -x pieces for black
Replies: 7
Views: 884

Re: Initial position -x pieces for black.

Hello Andreas: The following 10 positions I have analyzed intensively with different engines during the past few months. I have saved many analyzes for these positions. So hopefully I can answer one or the other question. The positions with two black minor pieces are currently the maximum feasible w...