New engine releases & news H1 2025

[pohl4711]

Integral 7

https://github.com/aronpetko/integral/releases/tag/v7

LTC selfplay progress:
Elo | 56.93 +- 4.72 (95%)
Conf | 40.0+0.40s Threads=1 Hash=32MB
Games | N: 5000 W: 1627 L: 815 D: 2558
Penta | [2, 274, 1145, 1068, 11]

Integral 6 is world's #11 in my UHO-Top15 Ratinglist. Will Integral 7 make it into the Top10? Result in 4 days... stay tuned!

[Norm Pollock]

Hi all,

I released a tool "epdFaux" in my 40H-EPD-2025 package of "epd" tools.

"epdFaux" removes all "faux" (false, fake, spurious) en passant notations in an "epd" file.
This includes "faux" notations due to (1) lack of opponent pawn to make the capture; (2) opponent's capturing pawn pinned to its own king which prevents the capture; and (3) the two-space pawn move uncovering a discovered check on the opponent's king preventing an ep capture.

Links below.
Norm Pollock

Hi all,
I recently became aware of some bugs in the above release of "epdFaux". These bugs can affect output. They have been corrected in an update that is now available at the links below. "epdFaux" is in the download for "40H-EPD" tools.
-Norm

[op12no2]

Lozza 5
https://github.com/op12no2/lozza/releases/tag/5

[pohl4711]

Alexandria 8.0

https://github.com/PGG106/Alexandria/re ... tag/v8.0.0

LTC Progression-test, using my UHO openings (Progression test was run on the Pohl.pgn book on OpenBench):
Elo | 42.25 +- 4.53 (95%)
Conf | 60.0+0.60s Threads=1 Hash=64MB
Games | N: 5000 W: 1592 L: 987 D: 2421
Penta | [4, 283, 1327, 876, 10]

[Frank Quisinsky]

Hi there,

A newer Fire 10.0:
https://github.com/FireFather/fire/tree/main/src

Uralochka Beta 8:
https://gitlab.com/freemanzlat/uralochka3/-/pipelines

Caissa 1.21.7:
https://github.com/Witek902/Caissa/releases

Best
Frank

[Graham Banks]

Hi there,

A newer Fire 10.0:
https://github.com/FireFather/fire/tree/main/src

Best
Frank

I don't think that Norm will mind me telling you what he told me - that it hasn't been officially 'released'...just updated. no improvement in Elo, just code changes and 'optimizations'...nnue evaluation is the same as 9.3.

[Frank Quisinsky]

Hi Graham,

I follow your tourneys.
Thanks for your efforts all the years!!

Fire:
Think so!

Cinder is very interesting, also Inanis ... I think both programs with a great future.
Found Cinder in one of your tounreys.

Best
Frank

[pohl4711]

Obsidian 15.09

The author asked me for a new testrun of Obsidian and provided me an avx512 binary. You can download it, too, if you are interested, but you need a CPU, supporting avx512:

[abulmo2]

Dumb 2.2 is out: https://github.com/abulmo/Dumb/releases/tag/v2.2
- use magic bitboard for move generation
- retuned evaluation function (still limited to material & positional square table).
- retuned search parameters + probcut added
- much better comments following the D convention
- added logging facilities & eval/board display to better understand how the engine works

This version is bout 20 Elo stronger than version 2.1.

[abulmo2]

Dumb 2.2 is out: https://github.com/abulmo/Dumb/releases/tag/v2.2
- use magic bitboard for move generation
- retuned evaluation function (still limited to material & positional square table).
- retuned search parameters + probcut added
- much better comments following the D convention
- added logging facilities & eval/board display to better understand how the engine works

This version is bout 20 Elo stronger than version 2.1.

Unfortunately I lately introduce a regression before releasing this version.
Version 2.3 fixes it: https://github.com/abulmo/Dumb/releases/tag/v2.3