It seems the old DLL's are good enough.
Zevra chess engine - I went back to development
Moderators: hgm, Rebel, chrisw
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- Posts: 1365
- Joined: Sat Jul 21, 2018 7:43 am
- Location: Szentendre, Hungary
- Full name: Gabor Szots
Re: Zevra chess engine - I went back to development
Gabor Szots
CCRL testing group
CCRL testing group
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- Posts: 261
- Joined: Sun Nov 13, 2016 10:37 am
Re: Zevra chess engine - I went back to development
I made the library not required
It was necessary to install gcc-mingv-w64, it allows you to do static compilation. Old versions use this too, but I have already forgotten in 2 years))
It was necessary to install gcc-mingv-w64, it allows you to do static compilation. Old versions use this too, but I have already forgotten in 2 years))
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
I am releasing a small update to Zevra: Zevra v2.2.1
It includes a slight increase in game strength by ~10 Elo points and fix cppcheck bugs
https://github.com/sovaz1997/Zevra2/releases
It includes a slight increase in game strength by ~10 Elo points and fix cppcheck bugs
https://github.com/sovaz1997/Zevra2/releases
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
New release - Zevra v2.3 r348!
https://github.com/sovaz1997/Zevra2/rel ... /v2.3_r348
This is a big release since I was successfully able to improve the evaluation function using the Texel method.
To do this, I used 100,000 self-play games, from which I took all positions where there are more than 7 pieces and in which the static eval differs from the qsearch by no more than 50 centipawns (it's about 1 million positions). Optimization was carried out for almost all parameters of the evaluation function. The total increase was about 80 Elo points, or even more!
https://github.com/sovaz1997/Zevra2/rel ... /v2.3_r348
This is a big release since I was successfully able to improve the evaluation function using the Texel method.
To do this, I used 100,000 self-play games, from which I took all positions where there are more than 7 pieces and in which the static eval differs from the qsearch by no more than 50 centipawns (it's about 1 million positions). Optimization was carried out for almost all parameters of the evaluation function. The total increase was about 80 Elo points, or even more!
Code: Select all
tc=10+0.1 Hash=16 Threads=1
Games: 1049 W: 518 L: 273 D: 258
ELO: 82.67 +- 18.59 (95%) LOS: 100.00%
Code: Select all
tc=60+0.6 Hash=16 Threads=1
Games: 897 W: 423 L: 201 D: 273
ELO: 87.81 +- 19.29 (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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- Posts: 261
- Joined: Sun Nov 13, 2016 10:37 am
Re: Zevra chess engine - I went back to development
New release - Zevra v2.4 r380!
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Today I am releasing the new version of Zevra!
Position evaluation has been improved in this version. By optimizing the tuner, I was able to achieve a much faster optimization of the parameters. In this version, PST-tables were added for the endgame and the eval parameters were trained on a new sample of self-play positions (positions were created by self-play Zevra v2.3 with some restrictions).
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Today I am releasing the new version of Zevra!
Position evaluation has been improved in this version. By optimizing the tuner, I was able to achieve a much faster optimization of the parameters. In this version, PST-tables were added for the endgame and the eval parameters were trained on a new sample of self-play positions (positions were created by self-play Zevra v2.3 with some restrictions).
Code: Select all
tc=10+0.1 hash=16 threads=1
LLR: 2.95 (-2.94, 2.94) [0.50, 3.50]
Games: 1356 W: 690 L: 417 D: 249
ELO: 70.92 +- 16.97 (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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- Posts: 1142
- Joined: Thu Dec 28, 2017 4:06 pm
- Location: Argentina
Re: Zevra chess engine - I went back to development
You're on a roll!!
Follow my tournament and some Leela gauntlets live at http://twitch.tv/ccls
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- Posts: 261
- Joined: Sun Nov 13, 2016 10:37 am
Re: Zevra chess engine - I went back to development
Updated link: https://github.com/sovaz1997/Zevra2/rel ... ix-compile
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: 7025
- Joined: Thu Aug 18, 2011 12:04 pm
- Full name: Ed Schröder
Re: Zevra chess engine - I went back to development
Put your engine as new entry for the Gambit Rating List.
Not sure how strong your engine currently is, I estimate ~2700 elo, we will see
Games : 1200
Elo pool : 2696
You can follow the progress on - http://rebel13.nl/b/grl.htm
Page refreshes itself every 30 seconds.
Good luck.
Not sure how strong your engine currently is, I estimate ~2700 elo, we will see
Games : 1200
Elo pool : 2696
You can follow the progress on - http://rebel13.nl/b/grl.htm
Page refreshes itself every 30 seconds.
Good luck.
90% of coding is debugging, the other 10% is writing bugs.
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- Posts: 883
- Joined: Sat Mar 13, 2021 1:47 am
- Full name: Amanj Sherwany
Re: Zevra chess engine - I went back to development
I think it is more like 2500 thoughRebel wrote: ↑Fri Sep 10, 2021 8:26 pm Put your engine as new entry for the Gambit Rating List.
Not sure how strong your engine currently is, I estimate ~2700 elo, we will see
Games : 1200
Elo pool : 2696
You can follow the progress on - http://rebel13.nl/b/grl.htm
Page refreshes itself every 30 seconds.
Good luck.
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- Posts: 7025
- Joined: Thu Aug 18, 2011 12:04 pm
- Full name: Ed Schröder
Re: Zevra chess engine - I went back to development
Zevra 2.4-r380 - 2629
Code: Select all
Gambit Rating List
Running : gauntlet Zevra_2.4-r380
Time Control : Time control : 40/120
Games : 1200
Results from file gauntlet-zevra.pgn:
No. Name Win Draw Loss Unf. Score Games %
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1 Zevra 2.4-r380 +363 =213 -624 *0 469.5 1200 39.1%
2 Fruit 2.1 +114 =34 -52 *0 131.0 200 65.5%
3 Dumb 1.8 +113 =32 -55 *0 129.0 200 64.5%
4 k2 099 +109 =38 -53 *0 128.0 200 64.0%
5 Zahak 5.0 +104 =35 -61 *0 121.5 200 60.8%
6 Supernova 2.3 +101 =34 -65 *0 118.0 200 59.0%
7 Monolith 0.4 +83 =40 -77 *0 103.0 200 51.5%
Total Games: 1200
White Wins: 504 (42.0%)
Black Wins: 483 (40.2%)
Draws: 213 (17.8%)
Unfinished: 0 (0.0%)
Estimated ratings for this elo 2696 pool
# PLAYER : RATING POINTS PLAYED (%)
1 Fruit 2.1 : 2741.4 131.0 200 66
2 Dumb 1.8 : 2733.7 129.0 200 65
3 k2 099 : 2729.9 128.0 200 64
4 Zahak 5.0 : 2705.6 121.5 200 61
5 Supernova 2.3 : 2692.8 118.0 200 59
6 Monolith 0.4 : 2639.6 103.0 200 52
7 Zevra 2.4-r380 : 2629.0 469.5 1200 39
90% of coding is debugging, the other 10% is writing bugs.