Zevra 1.6.2 r536

sovaz1997 · Post by **sovaz1997** » Mon Feb 19, 2018 8:23 pm

I will need pondering

tpoppins · Post by **tpoppins** » Mon Feb 19, 2018 9:39 pm

You could PM one of the moderators to change the thread title from "Tevra" to "Zevra". Last time I had to something like this to be done, HGM filled my request within an hour.

I know, you hardly ever notice here that moderators are around (unless a s**tstorm is brewing, which is rather rare) -- but they are out there and do their work quietly and efficiently.

sovaz1997 · Post by **sovaz1997** » Sat Mar 10, 2018 10:40 am

New version of Zevra. Implemented aspiration window and added a bonus for dual pawns. Small code refactoring.

Code: Select all

tc=10+0.1
Hash=16

Score of Zevra 180309 vs Zevra v1.8.2 r612 popcnt&#58; 4155 - 3318 - 2609  &#91;0.542&#93; 10082
Elo difference&#58; 28.91 +/- 5.84

https://github.com/sovaz1997/Zevra/rele ... 1.8.3_r636

sovaz1997 · Post by **sovaz1997** » Mon Mar 12, 2018 2:14 pm

New versions of Zevra (v1.8.4).
https://github.com/sovaz1997/Zevra/rele ... 1.8.4_r650
The elo gain is about 60 points in LTC. Changes in Multi-Cut and moves generator optimizations.

Code: Select all

tc=60+0.6 &#40;LTC&#41;
Hash=16
Score of Zevra v1.8.4 r650 vs Zevra v1.8.3 r636&#58; 347 - 204 - 257  &#91;0.588&#93; 808
Elo difference&#58; 62.14 +/- 19.94

---------------------------
tc=60+0.6 &#40;LTC&#41;
Hash=16

Score of  Zevra v1.8.4 r650 vs Zevra v1.8.1 r594 popcnt&#58; 704 - 268 - 394  &#91;0.660&#93; 1366
Elo difference&#58; 114.91 +/- 16.01

---------------------------

tc=10+0.1 &#40;STC&#41;
Hash=16

Score of Zevra  Zevra v1.8.4 r650 vs Zevra v1.8.1 r594 popcnt&#58; 648 - 292 - 260  &#91;0.648&#93; 1200
Elo difference&#58; 106.27 +/- 17.97

Graham Banks · Post by **Graham Banks** » Mon Mar 12, 2018 9:04 pm

sovaz1997 wrote:New versions of Zevra (v1.8.4).
https://github.com/sovaz1997/Zevra/rele ... 1.8.4_r650
The elo gain is about 60 points in LTC. Changes in Multi-Cut and moves generator optimizations.

Nice improvement Oleg.

Division 8 starts later this week.

sovaz1997 · Post by **sovaz1997** » Mon Mar 12, 2018 9:11 pm

Thanks!

CMCanavessi · Post by **CMCanavessi** » Mon Mar 12, 2018 9:39 pm

Nice, you'll need every single bit of elo if Zebra wants to survive next season, there will be 16 2500+ new entrants

sovaz1997 · Post by **sovaz1997** » Fri Apr 20, 2018 9:29 am

My lichess bot: https://lichess.org/@/zevra_chess
All time controlls, rated/unrated, standard variation.

sovaz1997 · Post by **sovaz1997** » Sat Jun 23, 2018 11:46 am

New release of Zevra: Zevra v1.8.5. Improved recognition of three-fold repetition of the position, added estimates of mg-eg for pawns, minor changes in the search.
The gain is approximately 20-30 points in 60+0.6.

Code: Select all

tc=60m+0.6s
hash=64mb

Score of Zevra v1.8.5 r664 vs Zevra v1.8.4 r650: 638 - 521 - 459  [0.536] 1618
Elo difference: 25.17 +/- 14.34

Kotlov · Post by **Kotlov** » Sat Jun 23, 2018 11:57 am

sovaz1997 wrote: ↑Sat Jun 23, 2018 11:46 am New release of Zevra: Zevra v1.8.5. Improved recognition of three-fold repetition of the position, added estimates of mg-eg for pawns, minor changes in the search.
The gain is approximately 20-30 points in 60+0.6.
Code: Select all
tc=60m+0.6s
hash=64mb

Score of Zevra v1.8.5 r664 vs Zevra v1.8.4 r650: 638 - 521 - 459  [0.536] 1618
Elo difference: 25.17 +/- 14.34

Great!

Zevra 1.6.2 r536

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