Search found 724 matches
- Sat May 25, 2019 3:31 am
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: QSearch perft
- Replies: 24
- Views: 6477
Re: QSearch perft
I think the difference is due to the fact that you don't generate check-evasions, because check-evasions will contain non captures too. So you have to generate evasions when the king is in check. You have to do this in quiescence too, otherwise your quiescence will make very big errors. Do you have...
- Sat May 11, 2019 12:11 am
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: win-chance for each root move
- Replies: 19
- Views: 4400
Re: win-chance for each root move
So 1.Na3 is the best move of all! :lol: I ran a script on 1.5M games and my results look like this: move # white draw black b1a3 72 48.611111% 5.555556% 45.833333% f2f3 162 46.913580% 6.172840% 46.913580% a2a4 160 46.875000% 10.000000% 43.125000% g2g4 1210 46.694215% 11.983471% 41.322314% b2b4 8628...
- Sat Dec 15, 2018 10:26 pm
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: out of time in PVS
- Replies: 14
- Views: 3467
Re: out of time in PVS
One usually stop the PVS search and use the result of the previous finished iterative deepening result. Remember that after you decide to stop the search you have also to stop saving killers, sving info to transposition tables and so on. One thing that has not been mentioned is that if the best mov...
- Sun Nov 04, 2018 8:22 pm
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: LMR and sacrifices
- Replies: 8
- Views: 2693
LMR and sacrifices
I was wondering what methods people use in distinguishing between between sacrifices that appear to lose material but should not be reduced and bad moves which do lose material and should be reduced.
- Sun Aug 26, 2018 10:26 pm
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: On-line engine blitz tourney August
- Replies: 15
- Views: 4376
Re: On-line engine blitz tourney August
:Tourney Players: Round 9 of 9 : : Name Rating Score Perfrm Upset Results : ----------------- ------ ----- ------ ------ ------- : 1 +LeelaZero [1971] 13.0 [2234] [ 182] +16w +12w +04b +07b +06w =02b =03b +11w +08w : 2 -Berta [1991] 11.5 [2080] [ 56] =13w +05b =06w +12w +14b =01w =08b =03w +11b : 3...
- Mon Jun 04, 2018 1:22 pm
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: 7-men Syzygy attempt
- Replies: 588
- Views: 192575
Re: 7-men Syzygy attempt
According to this page , the average number of probes for successful find is estimated to be http://cseweb.ucsd.edu/~kube/cls/100/Lectures/lec16/lec16-22.gif For alpha = 3002/4096, this gives 2.372. So what you measured is better than expected. For alpha = 3002/8192, we get 1.289, which is slightly...
- Wed Apr 25, 2018 7:49 pm
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: Saving killer moves...
- Replies: 13
- Views: 4453
Re: Saving killer moves...
Do you also check if the move is still a capture?Volker Annuss wrote:Captures can become killers in Arminius to have these capture moves searched before others.
There is one important exception. Moves that capture the last moved piece never become killers.
- Mon Apr 23, 2018 5:37 am
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: Draw scores in TT
- Replies: 15
- Views: 4446
Re: Draw scores in TT
How do you handle draw scores by repetition and fifty move rule in TT? I use zero as draw score, and simply prevent to load such an value from TT, i guess there are better techniques to prevent an mix up with an eval score of zero. -- Srdja edit: assuming i wish to use an 16 bit signed integer as t...
- Sun Apr 22, 2018 6:03 pm
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: Draw scores in TT
- Replies: 15
- Views: 4446
Re: Draw scores in TT
How do you handle draw scores by repetition and fifty move rule in TT? I use zero as draw score, and simply prevent to load such an value from TT, i guess there are better techniques to prevent an mix up with an eval score of zero. -- Srdja edit: assuming i wish to use an 16 bit signed integer as t...
- Sat Apr 07, 2018 4:44 pm
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: 7-men Syzygy attempt
- Replies: 588
- Views: 192575
Re: 7-man Syzygy attempt.
They already have in production a 100 TB SSD that draws 14 watts at full tilt. https://www.cinema5d.com/nimbus-data-100tb-ssd-worlds-largest-ssd/ Since it is already possible to make it, the density is feasible. And I guess that it costs little more to make it than to make a 10 TB SSD. The fact tha...