New engine releases 2019

[Roland Chastain]

Hello! Moustique 0.3 is available. The engine can now read a Polyglot opening book. It is shipped with the small Polyglot opening book by Olivier Deville.

[Guenther]

Topple 0.7.4 released yesterday
https://github.com/konsolas/ToppleChess/releases

Pulse 1.7.0 and 1.7.1 were released in November and were not mentioned yet
https://github.com/fluxroot/pulse/releases

There are daily/hourly updates for Demolito at the appveyor link below
https://ci.appveyor.com/project/lucasar ... to/history

I will compile a new Sapeli 1.67 today

GoogleplexStarthinker had a lot of commits in the last weeks,
probably a new release coming soon, or may be I compile a dev version

Also several (important) changes for Delocto since the last release 2018,
a new compile would make sense...
https://github.com/moterink/Delocto/commits/master

[Guenther]

Sorry, editing time was over, while finding the last missing one.

Scorpio 3.06 MCTS + NN was released two days ago
https://github.com/dshawul/Scorpio/releases

[Guenther]

...
I will compile a new Sapeli 1.67 today

GoogleplexStarthinker had a lot of commits in the last weeks,
probably a new release coming soon, or may be I compile a dev version
...

Ok, both are available now at my site.
The Googleplex_Starthinker dev version calls itself 1.7 beta2

http://rwbc-chess.de/download.htm

[voffka]

Igel 2.2.1 at https://github.com/vshcherbyna/igel/releases/tag/2.2.1 (binaries for Raspberry Pi, Linux, macOS and Windows). This is a TCEC QL S17 preparation release that contains important performance improvements as well as various bugfixes.

What's new:

- Rename uci option 'Level' into 'Skill Level'
- Do not apply razoring when in check
- Do not apply 'improving' factor when in check
- Do not prune quiets at root
- Fetch history only when a quiet move is detected
- Improve branching factor and apply LMR more aggressively
- Fix compilaton issue with clang compiler

Relative strength against Igel 2.2.0 in CCRL 40/4 time control:

Code: Select all

tc=40/102
hash=256
Score of Igel 2.2.1 64 POPCNT vs Igel 2.2.0 64 POPCNT: 362 - 257 - 951  [0.533] 1570
Elo difference: 23.27 +/- 10.77

[voffka]

Igel 2.2.2 at https://github.com/vshcherbyna/igel/releases/tag/2.2.2 (binaries for Raspberry Pi, Linux, macOS and Windows). This is a TCEC QL S17 preparation release that contains important performance improvements as well as various bugfixes.

What's new:

- Fix incorrect node count

[Scally]

Hi Volodymyr,

I noticed v2.3.0 became v2.2.1 with Skill Levels, followed quickly by v2.2.2 but Skill Levels are gone, back to Levels, is that correct?

Al.

[voffka]

Hey Scally,

Yes, it is correct. I was not sure about my changes I did in 2.2.1 (being in a hurry for a TCEC S17 start deadline, so doing some things in a rush), so I reverted those risky changes and introduced another (less risky) changes in Igel 2.2.2.

Everyone is advised to use 2.2.2 in testing instead of 2.2.1.

[Ratosh]

Pirarucu v3.2.4: https://github.com/ratosh/pirarucu/releases/tag/v3.2.4

[voffka]

Igel 2.3.0 at https://github.com/vshcherbyna/igel/releases/tag/2.3.0 (binaries for Raspberry Pi, Linux, macOS and Windows). This version is the one playing in TCEC S17 QL and has significant strength improvements over Igel 2.2.2.

What's new:

- Fix issue when reductions in LMR could lead directly to qsearch resulting in strength degradations
- Rename uci option 'Level' into 'Skill Level'
- Do not apply razoring when in check
- Do not apply 'improving' factor when in check
- Do not prune quiets at root
- Fetch history only when a quiet move is detected
- Improve branching factor and apply LMR more aggressively
- Fix compilaton issue with clang/gcc9 compiler

Relative strength compared to previous versions of Igel in CCRL 40/4 time control:

Code: Select all

os=linux
hash=256
tc=40/102 (CCRL 40/4)
Score of Igel 2.3.0 64 POPCNT vs Igel 2.2.2 64 POPCNT: 331 - 195 - 805  [0.551] 1331
Elo difference: 35.62 +/- 11.69