New engine releases 2020

[Modern Times]

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.

[CMCanavessi]

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.

[supersharp77]

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

[Gabor Szots]

Need A link for Devel 3.0.0a.......author only has version 3.0.0b currently on his site....Thx AR

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.

[Gabor Szots]

Need A link for Devel 3.0.0a.......author only has version 3.0.0b currently on his site....Thx AR

Try this link. I could not send an e-mail to you.

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

[voffka]

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

[Gabor Szots]

Thanks Voffka. Good to see you have so many ideas.

[Jamal Bubker]

Thank you Volodymyr !

[voffka]

You are always welcome!

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

[Norbert Raimund Leisner]

Chess XBoard https://github.com/genecook/chess/releases

PayFleens UCI https://github.com/robertomil81mil/PayFleens