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Re: New engine releases 2020

Posted: Sun Mar 15, 2020 8:01 pm
by Modern Times
CMCanavessi wrote: Sun Mar 15, 2020 7:24 pm Did something happen between Devel 3.0.0a and 3.0.0b ? There's a difference of 100 elo in CCRL between the 2, with 3.0.0a being stronger. How can that be the case? 3.0.0b is even weaker than Devel 2. Weird.
We're removing those 3.0.0b games pending further investigation.

Re: New engine releases 2020

Posted: Mon Mar 16, 2020 1:41 am
by CMCanavessi
Modern Times wrote: Sun Mar 15, 2020 8:01 pm
CMCanavessi wrote: Sun Mar 15, 2020 7:24 pm Did something happen between Devel 3.0.0a and 3.0.0b ? There's a difference of 100 elo in CCRL between the 2, with 3.0.0a being stronger. How can that be the case? 3.0.0b is even weaker than Devel 2. Weird.
We're removing those 3.0.0b games pending further investigation.
Maybe the change of compiler that was talked about some days ago is the culprit... hope the reason can be found soon.

Re: New engine releases 2020

Posted: Mon Mar 16, 2020 9:24 am
by supersharp77
CMCanavessi wrote: Mon Mar 16, 2020 1:41 am
Modern Times wrote: Sun Mar 15, 2020 8:01 pm
CMCanavessi wrote: Sun Mar 15, 2020 7:24 pm Did something happen between Devel 3.0.0a and 3.0.0b ? There's a difference of 100 elo in CCRL between the 2, with 3.0.0a being stronger. How can that be the case? 3.0.0b is even weaker than Devel 2. Weird.
We're removing those 3.0.0b games pending further investigation.
Maybe the change of compiler that was talked about some days ago is the culprit... hope the reason can be found soon.
Need A link for Devel 3.0.0a.......author only has version 3.0.0b currently on his site....Thx AR :) :wink:

Re: New engine releases 2020

Posted: Mon Mar 16, 2020 9:43 am
by Gabor Szots
supersharp77 wrote: Mon Mar 16, 2020 9:24 amNeed A link for Devel 3.0.0a.......author only has version 3.0.0b currently on his site....Thx AR :) :wink:
Removed because of false virus alerts. I have since updated my Win10 and the alarm has gone. If you want it send me an e-mail (address in my profile) and I'll send it to you.

Re: New engine releases 2020

Posted: Mon Mar 16, 2020 9:55 pm
by Gabor Szots
supersharp77 wrote: Mon Mar 16, 2020 9:24 amNeed A link for Devel 3.0.0a.......author only has version 3.0.0b currently on his site....Thx AR :) :wink:
Try this link. I could not send an e-mail to you.

http://kirill-kryukov.com/chess/discuss ... =7&t=11912

Re: New engine releases 2020

Posted: Sun Mar 22, 2020 3:11 am
by voffka
Image

Igel 2.4.0 at https://github.com/vshcherbyna/igel/releases/tag/2.4.0 (binaries for Raspberry Pi, Linux, macOS and Windows).

What's new:

- Implement singlular extensions
- Detect drop of score and using time more aggressively
- Remove IID and simplify search
- Do not tt cutoff on pv moves
- Simplification for nullmove pruning
- Simplification for connected pawn evalution
- Basic endgame knowledge to detect draw in eval/search
- Retune everything + decrease number of tunnable parameters from 2600 to 1500
- Apply LMR when at least one legal move has been played
- Decrease reductions in LMR for pv moves

Relative strength compared to previous versions of Igel in 60s+0.6s time control:

Code: Select all

os=linux
hash=256
tc=all/60+0.6
Score of Igel 2.4.0 64 POPCNT vs Igel 2.3.1 64 POPCNT: 266 - 170 - 564 [0.548] 1000
Elo difference: 33.46 +/- 14.19
Relative strength compared to Winter 0.7 BMI2 in CCRL 40/4 time control:

Code: Select all

os=windows
hash=256
tc=40/102
Score of Igel 2.4.0 64 POPCNT vs Winter 0.7 BMI2: 7 - 0 - 3  [0.850] 10
Relative strength compared to RubiChess 1.6 in CCRL 40/4 time control:

Code: Select all

os=windows
hash=256
tc=40/102
Score of Igel 2.4.0 64 POPCNT vs RubiChess 1.6: 5 - 2 - 4  [0.636] 11

Re: New engine releases 2020

Posted: Sun Mar 22, 2020 8:25 am
by Gabor Szots
Thanks Voffka. Good to see you have so many ideas.

Re: New engine releases 2020

Posted: Sun Mar 22, 2020 1:21 pm
by Jamal Bubker
Thank you Volodymyr !

Re: New engine releases 2020

Posted: Sun Mar 22, 2020 3:27 pm
by voffka
You are always welcome!

P.S. I am out of ideas lately :) It is harder and harder to get elo these days ;)

Re: New engine releases 2020

Posted: Tue Mar 24, 2020 1:32 pm
by Norbert Raimund Leisner