Search found 4319 matches

by syzygy
Sun Oct 04, 2020 4:04 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: BONA_PIECE_ZERO
Replies: 18
Views: 1112

Re: BONA_PIECE_ZERO

elcabesa wrote:
Sun Oct 04, 2020 4:01 pm
thank you,
you are always very clear and polite
You're welcome.

It might be interesting to try to look at the NNUE implementation for Shogi. Perhaps the "BONA_PIECE_ZERO" concept was implemented there...
by syzygy
Sun Oct 04, 2020 3:59 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: BONA_PIECE_ZERO
Replies: 18
Views: 1112

Re: BONA_PIECE_ZERO

so what does this mean? 41,024 = 64 * 641. 64 comes from the number of the cells where king may exist. 641 = 64 * 5 * 2 + 1. 64 here comes from the number of the cells where a piece other than king may exist. 5 is the number of piece types other than king. 2 is the number of the colors, white and b...
by syzygy
Sun Oct 04, 2020 3:39 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: BONA_PIECE_ZERO
Replies: 18
Views: 1112

Re: BONA_PIECE_ZERO

In the NNUE playing code, it does exactly nothing. Those weights are simply not used. Just like the weights corresponding to a piece on the same square as the friendly king. so those unused features can be used to encode some other information e.g. castling rights. Obviously those added feature nee...
by syzygy
Sun Oct 04, 2020 3:28 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: BONA_PIECE_ZERO
Replies: 18
Views: 1112

Re: BONA_PIECE_ZERO

elcabesa wrote:
Sun Oct 04, 2020 2:17 pm
ok understood.

just another question, even if it is not related to this topic.

does the "standard" stockfish NNUE feature encoding also encode the capture square, if a capture is performed?
No.
by syzygy
Sun Oct 04, 2020 2:01 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: BONA_PIECE_ZERO
Replies: 18
Views: 1112

Re: BONA_PIECE_ZERO

I read and read, tried to find info, looked at some implementation, but failed to find useful information can someone explain it simply or point me to a simple article? In the NNUE playing code, it does exactly nothing. Those weights are simply not used. Just like the weights corresponding to a pie...
by syzygy
Sun Oct 04, 2020 1:48 pm
Forum: Computer Chess Club: General Topics
Topic: Will black mate here ?
Replies: 10
Views: 615

Re: Will black mate here ?

Analysis by CF 041020 x64 SSE41 N: 1. -+ (-#22): 1...Nd3 2.b4 c6 3.Kh7 Kf7 4.Kh8 Nb2 5.Kh7 Nc4 6.Kh8 Na3 7.Kh7 Nb5 8.c4 Nxd4 9.a4 Nb3 10.Kh8 c5 11.bxc5 Nxc5 12.a5 Nb7 13.a6 Nc5 14.Kh7 Nxa6 15.Kh8 Nc5 16.Kh7 a5 17.Kh8 a4 18.Kh7 Nd7 19.Kh8 a3 20.c5 a2 21.Kh7 a1Q 22.c6 Nf8# Oh that's annoying, I only ...
by syzygy
Sun Oct 04, 2020 1:34 pm
Forum: Computer Chess Club: General Topics
Topic: Which of the many chess engines in this forum use b strategy ?
Replies: 92
Views: 3027

Re: Which of the many chess engines in this forum use b strategy ?

If it is such a dangerous method, how were Broughton and Nitsche able to win a championship title with it against the competitors climbing the mountain with a rope in Daylight ??!! https://www.schach-computer.info/wiki/index.php/Broughton,_David I devised a scheme of selective search that was very ...
by syzygy
Sun Oct 04, 2020 12:36 pm
Forum: Computer Chess Club: General Topics
Topic: Will black mate here ?
Replies: 10
Views: 615

Re: Will black mate here ?

Mate in 28: [Result "0-1"] [FEN "5k1K/p1p5/7P/7P/3P4/2P5/PP6/4n3 b - - 0 1"] 1... Nd3 2. b4 Nc1 3. a3 Ne2 4. c4 Nxd4 5. Kh7 Kf7 6. b5 Nb3 7. Kh8 Nc5 8. Kh7 Nb7 9. a4 Nc5 10. Kh8 Nxa4 11. c5 Nxc5 12. h7 Nd7 13. b6 axb6 14. h6 Kg6 15. Kg8 Nf6+ 16. Kf8 Nxh7+ 17. Ke7 b5 18. Ke8 b4 19. Kd7 b3 20. Kc6 b2 ...
by syzygy
Sun Oct 04, 2020 12:27 pm
Forum: Computer Chess Club: General Topics
Topic: Which of the many chess engines in this forum use b strategy ?
Replies: 92
Views: 3027

Re: Which of the many chess engines in this forum use b strategy ?

In 1981 david Broughton won the championship title with a b strategy engine MKV. In 1984 thomas nitsche und Elmar Henne won the championship title with mephisto III S Glasgow. Both engines were highly interesting. Commercial products but completely different methods like the other AB programs, Let'...
by syzygy
Sun Oct 04, 2020 12:02 pm
Forum: Computer Chess Club: General Topics
Topic: Will black mate here ?
Replies: 10
Views: 615

Re: Will black mate here ?

Indeed, I was thinking black to move. Sorry for the mistake. [D]5k1K/p1p5/7P/7P/3P4/2P5/PP6/4n3 b - - 0 1 info depth 52 seldepth 50 multipv 1 score mate 33 nodes 76355286 nps 396533 hashfull 97 tbhits 428203 time 192557 pv e1d3 b2b4 d3b2 h8h7 f8f7 h7h8 b2c4 d4d5 c4e3 a2a3 e3c4 a3a4 c4b6 c3c4 b6c4 b...