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by Uri Blass
Sat Jul 31, 2021 12:12 pm
Forum: Computer Chess Club: General Topics
Topic: mate suite for chess engines
Replies: 2
Views: 172

Re: mate suite for chess engines

You can add the following mate in 9
4k3/3pppp1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 9

Note that I analyzed distance to mate of all positions when black has 4 pawns or less than it and I may give more positions with more than one solution.
by Uri Blass
Fri Jul 30, 2021 10:22 pm
Forum: Computer Chess Club: General Topics
Topic: mate suite for chess engines
Replies: 2
Views: 172

mate suite for chess engines

All these positions have a single solution based on chest. 4k3/8/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 6 4k3/pp6/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm d4 dm 7 4k3/p3p3/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 7 4k3/4p1p1/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 bm e4 dm 7 4k3/5p1p/8/8/8/8...
by Uri Blass
Fri Jul 30, 2021 5:23 pm
Forum: Computer Chess Club: General Topics
Topic: stockfish needs depth 199 to find the best move
Replies: 3
Views: 329

stockfish needs depth 199 to find the best move

4k3/pp6/8/8/8/8/PPPPPPPP/RNBQKBNR w KQ - 0 1 Stockfish_21072907_x64_avx2: NNUE evaluation using nn-56a5f1c4173a.nnue enabled 1/1 00:00 84 84k +36.07 d2-d3 2/2 00:00 1k 533k +35.63 e2-e3 Ke8-d7 3/3 00:00 2k 880k +36.23 Nb1-c3 Ke8-f8 d2-d3 4/4 00:00 4k 1,990k +36.09 Nb1-c3 Ke8-f8 d2-d3 Kf8-f7 5/5 00:...
by Uri Blass
Tue Jul 27, 2021 3:26 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish vs Chessbase....Who Do We Root For?!?
Replies: 16
Views: 1701

Re: Stockfish vs Chessbase....Who Do We Root For?!?

I can also add that I consider Chessbase as a big company You say: ChessBase GmbH has 20 employees at this location and generates $2.05 million in sales (USD). (Sales figure is estimated). 2.05 million divided by 20 is more than 100,000$ per year. I believe that most commercial chess programs have l...
by Uri Blass
Tue Jul 27, 2021 3:13 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish vs Chessbase....Who Do We Root For?!?
Replies: 16
Views: 1701

Re: Stockfish vs Chessbase....Who Do We Root For?!?

I do not see a potential for stockfish to be monpolistic. They do not care about customers because they have no customers and they care only about one thing that is the playing strength of stockfish. For commercial programs I think that it is a mistake to try to have the highest elo and it is better...
by Uri Blass
Fri Jul 23, 2021 6:13 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish: Our lawsuit against ChessBase
Replies: 232
Views: 18453

Re: Stockfish: Our lawsuit against ChessBase

Since it's impossible to reach Stockfish 14 (+100 ELO over commercials Dragon 2.0 and Fat Fritz 2.0, +200 ELO over Ethereal 13 NNUE) the only way to survive for Chessbase is to include Powerbooks 2022 & up to 7-man online tablebases on Fritz 18 if they want to sell their 20 years old GUI for 99€, n...
by Uri Blass
Fri Jul 23, 2021 9:11 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish: Our lawsuit against ChessBase
Replies: 232
Views: 18453

Re: Stockfish: Our lawsuit against ChessBase

Since it's impossible to reach Stockfish 14 (+100 ELO over commercials Dragon 2.0 and Fat Fritz 2.0, +200 ELO over Ethereal 13 NNUE) the only way to survive for Chessbase is to include Powerbooks 2022 & up to 7-man online tablebases on Fritz 18 if they want to sell their 20 years old GUI for 99€, n...
by Uri Blass
Fri Jul 23, 2021 6:25 am
Forum: Computer Chess Club: General Topics
Topic: Where is Father famous anti computer chess player
Replies: 72
Views: 14202

Re: Rated game Threefold repetition

[Event "Blitz 1min"] [Site "?"] [Date "2021.07.22"] [Round "?"] [White "Rated game"] [Black "Restrepo, Pablo"] [Result "1/2-1/2"] [ECO "A90"] [WhiteElo "2570"] [BlackElo "1861"] [PlyCount "129"] [TimeControl "60"] 1. g3 {0} d5 {2} 2. Nf3 {0} e6 {1} 3. d4 {0} f5 {1} 4. c4 {0} Nf6 {1} 5. Bg2 {0 } c6 ...
by Uri Blass
Fri Jul 23, 2021 5:48 am
Forum: Computer Chess Club: General Topics
Topic: stockfish evaluates knight as more than rook
Replies: 14
Views: 1611

Re: stockfish evaluates knight as more than rook

I can add that I have an idea how to calculate distance of unproved mate in the evaluation. Give the engine to play against itself and if one side wins in 32 moves then you have unproved mate in 32. It is better to use an engine that knows to mate the opponent fast so first step to decide which engi...
by Uri Blass
Fri Jul 23, 2021 5:27 am
Forum: Computer Chess Club: General Topics
Topic: stockfish evaluates knight as more than rook
Replies: 14
Views: 1611

Re: stockfish evaluates knight as more than rook

NN evaluations are highly non-linear anyway, so if anything is "stupid" it is expecting NNUE to behave like HCE where terms are additive and piece values dominate. The problem is not that the evaluation is not linear but that the evaluation does not evaluate positions with smaller distance to mate ...