Good result!
Thanks for testing!!!
Zevra chess engine - I went back to development
Moderators: hgm, Rebel, chrisw
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- Posts: 261
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Re: Zevra chess engine - I went back to development
Zevra 2 is my chess engine. Binary, source and description here: https://github.com/sovaz1997/Zevra2
Zevra v2.5 is last version of Zevra: https://github.com/sovaz1997/Zevra2/releases
Zevra v2.5 is last version of Zevra: https://github.com/sovaz1997/Zevra2/releases
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- Posts: 261
- Joined: Sun Nov 13, 2016 10:37 am
Re: Zevra chess engine - I went back to development
Hey! Today I am releasing a new version of Zevra: Zevra v2.5!
This version has a big improvement in game level - about 80 elo points.
This version includes the following changes:
Test results:
https://github.com/sovaz1997/Zevra2/releases
This version has a big improvement in game level - about 80 elo points.
This version includes the following changes:
- Fix big in the calculation of the piece weights in the params tuner (tuning uses a specific calculation of the eval for speed-up);
- Add tapered eval for mobility;
- Restarting the tuner from scratch for a qualitative improvement in the eval. It seems to me that the ideal iterations count in Texel's tuning is about 50-80 iterations for ~900 params and 1 000 000 positions. If more or less, it will be a Elo loss;
- The hash is now 2-bucket. This gave a slight improvement in game level, but Zevra now solve positions faster.
Test results:
Code: Select all
tc=10+0.1
Games: 3000/3000 W: 1337 L: 658 D: 1005
ELO: 80.02 +- 10.25 (95%) LOS: 100.00%
Code: Select all
tc=60+0.6
Games: 1000/1000 W: 430 L: 211 D: 359
ELO: 77.34 +- 17.41 (95%) LOS: 100.00%
Zevra 2 is my chess engine. Binary, source and description here: https://github.com/sovaz1997/Zevra2
Zevra v2.5 is last version of Zevra: https://github.com/sovaz1997/Zevra2/releases
Zevra v2.5 is last version of Zevra: https://github.com/sovaz1997/Zevra2/releases
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- Joined: Thu Aug 18, 2011 12:04 pm
Re: Zevra chess engine - I went back to development
90% of coding is debugging, the other 10% is writing bugs.
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- Posts: 261
- Joined: Sun Nov 13, 2016 10:37 am
Re: Zevra chess engine - I went back to development
Thanks for testing!Rebel wrote: ↑Mon Sep 20, 2021 8:27 pm Running Zevra 2.5 for the GRL.
Games : 1000
Elo pool : 2662
http://rebel13.nl/a/grl.htm
Zevra 2 is my chess engine. Binary, source and description here: https://github.com/sovaz1997/Zevra2
Zevra v2.5 is last version of Zevra: https://github.com/sovaz1997/Zevra2/releases
Zevra v2.5 is last version of Zevra: https://github.com/sovaz1997/Zevra2/releases
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- Posts: 6995
- Joined: Thu Aug 18, 2011 12:04 pm
Re: Zevra chess engine - I went back to development
90% of coding is debugging, the other 10% is writing bugs.
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- Posts: 261
- Joined: Sun Nov 13, 2016 10:37 am
Re: Zevra chess engine - I went back to development
Good resultRebel wrote: ↑Tue Sep 21, 2021 7:49 am Zevra 2.5 +45
Details at - https://prodeo.actieforum.com/t358p25-g ... sults#4614
Like in my tests, perhaps Zevra v2.4 showed an overestimated performance (in any case, according to my tests, it is slightly lower):
Code: Select all
# PLAYER : RATING ERROR POINTS PLAYED (%)
1 Komodo 7a 64-bit : 3318.8 39.3 3506.5 3551 99
2 WyldChess : 2673.6 19.3 1036.5 1794 58
3 Zevra v2.5 : 2656.1 16.0 2344.5 3978 59
4 Zevra v2.4 r380 : 2581.7 18.4 861.0 1808 48
5 Zevra v2.3 r348 : 2542.4 18.4 768.5 1795 43
6 Galjoen 0.41.2 : 2503.1 18.3 684.0 1793 38
7 CT800 V1.43 64 bit : 2492.6 18.4 664.5 1798 37
8 Zevra v2.2.1 r328 : 2436.1 18.3 542.0 1786 30
9 Loki 3.5.0 : 2421.6 18.7 517.0 1795 29
10 Zevra v2.1.2 r248 : 2419.0 ---- 510.5 1789 29
11 Teki 2 : 2362.2 19.2 405.0 1793 23
Zevra 2 is my chess engine. Binary, source and description here: https://github.com/sovaz1997/Zevra2
Zevra v2.5 is last version of Zevra: https://github.com/sovaz1997/Zevra2/releases
Zevra v2.5 is last version of Zevra: https://github.com/sovaz1997/Zevra2/releases