Discussion of anything and everything relating to chess playing software and machines.
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sovaz1997
Posts: 261Joined: Sun Nov 13, 2016 10:37 am
Post by sovaz1997 Mon Nov 05, 2018 7:22 pm
Zevra 2.0 is new engine. It's beta version for now.
Completely new;
Movegen 2x-faster (perft: 20000 knps in i7-860);
Reduced the size of tt entry;
Initialization speed-up;
Code size does not exceed 3000 lines;
Source:
https://gitlab.com/sovaz1997/zevra2/
Binary:
https://gitlab.com/sovaz1997/zevra2/tags/v2.0_r146_beta
Test results:
Code: Select all
tc=60s+0.6s
Hash=16mb
Zevra v2.0 beta vs. Zevra v1.8.6:
Score: 200 - 87 - 134 [0.634] 421
Elo difference: 95.60 +/- 27.96
Now it's ~2380-2400 elo in CCRL 40/4.
Graham Banks
Posts: 41432Joined: Sun Feb 26, 2006 10:52 amLocation: Auckland, NZ
Post by Graham Banks Mon Nov 05, 2018 9:06 pm
Sounds like a nice improvement.
gbanksnz at gmail.com
CMCanavessi
Posts: 1142Joined: Thu Dec 28, 2017 4:06 pmLocation: Argentina
Post by CMCanavessi Mon Nov 05, 2018 10:32 pm
Nice !!! Hope you release the non-beta soon
sovaz1997
Posts: 261Joined: Sun Nov 13, 2016 10:37 am
Post by sovaz1997 Tue Nov 06, 2018 1:59 am
Zevra 2.0 now plays in Graham Tournament (
71st Amateur Division 8 ).
One game from this tournament:
[pgn]
[Site "GrahamCCRL.dyndns.org\71st Amateur D8.e1e"]
[Date "11-06-2018"]
[White "EveAnn 1.72 "]
[Black "Zevra v2.0 r146 beta "]
[Result "0-1"]
[TimeControl "4025:000 "]
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 dxc4 6. e4 h6 7. Bxf6
Qxf6 8. Bxc4 O-O 9. e5 Qg6 10. O-O Nc6 11. h3 a6 12. Bd3 f5 13. Qb3
Qf7 14. a3 Ba5 15. Rfd1 Kh8 16. Qa2 g5 17. d5 g4 18. dxc6 gxf3 19. cxb7
Qg7 20. g3 Bb6 21. Kf1 Bxb7 22. Qxe6 Rae8 23. Qc4 f4 24. Be4 fxg3
25. Bxb7 g2 26. Kg1 Qg3 27. Ne4 Qxh3 28. Ng3 Qxg3 29. Rd4 Bxd4 30. Qxd4
0-1
[/pgn]
sovaz1997
Posts: 261Joined: Sun Nov 13, 2016 10:37 am
Post by sovaz1997 Wed Nov 07, 2018 1:13 am
Zevra v2.0 release!
Code: Select all
tc=10s+0.1s
Hash=16mb
Score of Zevra v2.0 r172 vs Zevra v2.0 beta: 225 - 126 - 202 [0.590] 553
Elo difference: 62.88 +/- 23.23
https://gitlab.com/sovaz1997/zevra2/tags/v2.0_r172
Sergio Martinez
Posts: 1975Joined: Fri Oct 05, 2012 2:35 pmLocation: Spain
Post by Sergio Martinez Wed Nov 07, 2018 9:33 am
Hi Zevra lost on time most of games under Arena in my i7 6700k time control: 40/2. I have tested versions r146 and r172
Member of the CCRL Group. Write me if you want I test your engine.
sovaz1997
Posts: 261Joined: Sun Nov 13, 2016 10:37 am
Post by sovaz1997 Wed Nov 07, 2018 9:48 am
Sergio Martinez wrote: ↑ Wed Nov 07, 2018 9:33 am
Hi Zevra lost on time most of games under Arena in my i7 6700k time control: 40/2. I have tested versions r146 and r172
40 moves in 2 seconds or minutes? Today-tomorrow I will try to fix all the problems found and release 2.0.1. Thanks for testing!
Is it time loses?
Sergio Martinez
Posts: 1975Joined: Fri Oct 05, 2012 2:35 pmLocation: Spain
Post by Sergio Martinez Wed Nov 07, 2018 10:02 am
40 moves in 2 minutes.
Member of the CCRL Group. Write me if you want I test your engine.
sovaz1997
Posts: 261Joined: Sun Nov 13, 2016 10:37 am
Post by sovaz1997 Wed Nov 07, 2018 11:01 am
Sergio Martinez wrote: ↑ Wed Nov 07, 2018 10:02 am
40 moves in 2 minutes.
there are time loses. Zevra spent all time without move (appears engine crashes)
I make update binaries, you can check it
