Skip to main content

Since you’re here...

... we have a small favour to ask. More people, like you, are reading and supporting our blog: "Chess Engines Diary". And unlike many other sites and blogs, we made the choice to keep our articles open for all, regardless of where they live or what they can afford to pay.

We hope you will consider supporting us today. We need your support to continue to exist, because good entries are more and more work time. Every reader contribution, however big or small, is so valuable. Support "Chess Engines Diary" even a small amount– and it only takes a minute. Thank you.
============================== My email: jotes@go2.pl



Chess engine: Simbelmyne 1.8.0

 


Simbelmyne - UCI engine
Rating CEDR=2474

v.1.8.0:
What's new
This version mostly focuses on search tweaks. Most every tweak I could get to
gain has been included, so I imagine we're getting into diminishing returns and
~5 Elo patches.

Simbelmyne 1.8 is around 180 Elo stronger than 1.7 in STC self-play.
A small gauntlet places Simbelmyne at around 3050 Blitz 🎉

   # PLAYER                     : RATING    POINTS  PLAYED    (%)
   1 Avalanche 1.3              : 3085.0     322.0     727   44.3%
   2 Princhess 0.15             : 3073.0     330.5     726   45.5%
   3 Akimbo 0.5                 : 3058.0     405.5     728   55.7%
   4 Simbelmyne 1.8.0           : 3052.5    3221.5    5811   55.4%
   5 Koivisto 3.0               : 3027.0     328.0     726   45.2%
   6 Nalwald 16                 : 3001.0     389.5     726   53.7%
   7 Viridithas 3.0             : 2985.0     296.0     726   40.8%
   8 Black Marlin 2.0           : 2938.0     265.0     726   36.5%
   9 Polaris 1.7.0              : 2937.0     253.0     726   34.8%
Added features
🔍 Search
Tweak aspiration window implementation (20.5+/-14.2) (#207)
Reduce PV nodes less instead of non-pv nodes more (10.1+/-8.1) (#208)
History table refactor (#209) (#210)
Tweak quiet history penalties and ageing (35.9+/-20.1) (#211)
1 ply continuation history (21.6+/-14.6) (#215)
Countermove table (13.4+/-10.4) (#216)
Don't overwrite TT move in all-nodes (21.6+/-14.7) (#217)
Include promotions in tacticals in (somewhat) staged movegen (#220)
Use "improving" heuristic in LMP (18.8+/-13.4) (#221)
Use "improving" in NMP (11.1+/-7.5) (#222)
Reduce more/less according to history score (16.7+/-12.3) (#223)
⚖️: Evaluation
Make incremental eval term branchless (#204)
🐛 Bugfixes
Fix SEE to work with non-zero margins (#202)
Only report "stop_early" when there's one legal move in root (#205)
Fix nodecounts and nps reporting (#206)
Fix LMP move threshold (23.8+/-15.7) (#219)
♟️ Lichess Bot
Tweak Dockerfile to fetch and build source from main
Add deploy script for easy redeploys
Tweak deploy script to GC old containers/images
Misc
Use fixed-point multiplication trick instead of module based indexing of TT (12+/-8) (#203)
See the respective PRs for self-play results where relevant

Choosing a binary
This release comes with precompiled binaries for all major platforms. Because
the engine benefits tremendously from more modern CPU instruction sets, there
are binaries compiled for major instruction sets, following the x86-64
microarchitecture levels
as a naming scheme.

Realistically, on modern hardware (< 10 years old), you should be okay to use the
binaries labeled V3. If the engine crashes within the first seconds, try V2,
and so on.


Simbelmyne 1.5.1 - results:
Critter 1.6a0.5/3-23 Partii
Caissa 1.180/3-33 Partii
Alexandria 6.1.00/3-33 Partii
Akimbo 1.0.00/3-33 Partii
Victoire 1.3.02/2+22 Partii
Zagreus 5.02/2+22 Partii
Cadabra 2.0.12/2+22 Partii
Tcheran 2.22/2+22 Partii
Yakka 1.01.5/2+12 Partii
Delocto 0.71/2+02 Partii
Bagatur 3.7e0.5/2-12 Partii
Vafra 14.12.1 Stockfish0/2-22 Partii
Peacekeeper 2.400/2-22 Partii
Pawn 3.00/2-22 Partii
Obsidian 12.00/2-22 Partii
Midnight 90/2-22 Partii
Velvet 7.3.00/2-22 Partii
Clarity 6.0.00/2-22 Partii
Seer 2.7.00/2-22 Partii
Rebel 16.30/2-22 Partii
Arasan 24.20/2-22 Partii

Simbelmyne 1.8.0 download


Labels:

Comments

Post a Comment

Popular posts from this blog

New Strong Engines Test, by Chess Engines Diary, 2024.04.12

  💾  552 (!) games from the tournament download   👍 @chessenginesdiary  Country - Poland, City -  Malbork 🕓 Time 3'+3" 💻HP Pavilion i5-1035G1 8GB RAM 🖬 GUI-Banksia All  CEDR  317.321 games download  (01.04.2024 - 3'+3")  HypnoS 030424, Yuli GM Pro 16, Stockfish 16.1 and ShashChess 35 . These four engines scored the same number of points and placed at the top of the table in this strong tournament. Tech table: Engine KN/move NPS dep/mov time/mov mov/game time/game fails Alexandria 6.1.0 3218 576429 30.2 5.6 56.7 316.2 Berserk 13 4779 841025 36.7 5.7 56.0 318.1 Brainlearn 28 2275 366977 31.4 6.2 43.5 269.4 Caissa 1.18 5492 923486 30.2 5.9 50.4 299.7 Clover 6.1.19 4803 854377 31.4 5.6 62.2 349.4 Cool Iris 12.10 2201 356730 27.6 6.2 51.2 315.5 CorChess 20240331 2253 372774 27.4 6.0 52.2 315.8 Crystal 8 3582 571994 20.3 6.3 47.7 298.8 Fire 9.3 5225 876565 22.0 6.0 55.5 331.1 Fisherov chess monk 1.2 3487 619728 36.0 5.6 60.4 340.0 Hyp
Post a Comment
Read more

End of the Torch Experiement?

 Andrew Grant: "Almost exactly one year ago we announced the release of Torch. We were a bit ambitious at the time, and announced it as the #2 engine, after beating Leela in the most recent Bullet event at CCC at the time. Today, that claim rings much more true, although still has some minor points of contention. Torch has beaten Leela in multiple Bullet and Blitz events in a row; Never managed to win one of the Rapid events; But has beaten Leela in a h2h classical event. Chesscom got into the space out of a need to develop a replacement for Komodo. They needed a strong chess engine which could be used for integrating their other products. Many features on Chesscom, from Game Review, to puzzle generation, to Bots (obviously!) are powered by high quality engines. The goal was always for that. In fact, despite me being the only full time employee working on Torch, a plurality of my time was spent on things not related to Torch's strength. Its a bit self-aggrandizing, but the Tor
Post a Comment
Read more

SugaR AI SE wins New Strong Engines Test, by Chess Engines Diary, 2024.05.25-29

The tournament of strong chess engines was won by SugaR AI SE . This is a very good compilation though. In places 2 to 4: Stockfish 20240523 Ivec , Sun 15 and Deep Blue-20240518-assassin . All CEDR  333.448 games download  (01.05.2024 - 3'+3")  💾  600 (!) games from the tournament download 👍 @chessenginesdiary Country - Poland, City -  Malbork   🕓 Time 3'+3"  💻HP Pavilion i5-1035G1 8GB RAM 🖬 GUI-Banksia Tech table: Engine KN/mov NPS dep/mov time/mov mov/game time/game fail Caissa 1.18 4920 906675 27.5 5.4 64.4 349.7 Chess-System-Tal-2.00 2263 448276 20.6 5.0 64.5 325.8 Clover 6.1.24 JA 4435 820982 27.6 5.4 70.4 380.3 Cool Iris 12.10 2138 356907 26.7 6.0 54.2 324.7 CorChess 20240523 1885 330718 28.5 5.7 55.7 317.3 Crystal 8 3408 585347 20.7 5.8 55.3 321.7 Deep Blue-20240518 1717 308790 31.1 5.6 59.6 331.4 Dragon 1 by Komodo 3688 693178 24.0 5.3 68.2 362.7 Fisherov chess monk 1.2 3290 620116 34.0 5.3 67.9 360.2 HypnoS 160524 1871 328
Post a Comment
Read more

Chess engine: Deep Ripper -1 (Stockfish derivatives)

Deep Ripper (Stockfish derivatives) by Eduard Nemeth Author: " Here is the first official version of Deep Ripper. For now, I have decided on a version that can be used for any hardware. If you only have a few cores, you should set the number of variants to 1 or 2. However, 4 variants are standard (1 to 10 can be set), which deliver very good analysis results on 6 or more cores. Playing on servers is also possible. I hope you enjoy testing." Deep Ripper - 1 download Deep Ripper - 1 download This engine uses the Random Op. MultiPV mode. Here, several variants are examined in parallel and, after e.g. 16 plies, merged into a single variant. This is not the same as the normal multi-variant mode, where all variants are examined separately. The results can be completely different! So it makes no sense to create an identical engine without the random mode.
Post a Comment
Read more

New chess engine: HypnoS 220624 (derived from Stockfish)

  HypnoS is a free and strong UCI chess engine derived from Stockfish  that analyzes chess positions and computes the optimal moves. HypnoS does not include a graphical user interface (GUI) that is required  to display a chessboard and to make it easy to input moves. These GUIs are  developed independently from HypnoS and are available online. HypnoS development is currently supported on the Openbench framework. OpenBench (created by Andrew Grant) is an open-source Sequential Probability Ratio Testing (SPRT) framework designed for self-play testing of engines. OpenBench makes use of distributed computing, allowing anyone to contribute CPU time to further the development of some of the world's most powerful engines. HypnoS 220624 test: STC 10.0+0.10 LLR: 2.95 (-2.94, 2.94) [0.00, 2.00] Games: 121998 W: 32785 L: 32336 D: 56877 Pntml(0-2): 451, 14472, 30679, 14971, 426 hypnos.bigzerchess.com/test/25/ LTC 60.0+0.60 LLR: 2.95 (-2.94, 2.94) [0.50, 2.50] Games: 41886 W: 10828 L: 10493 D:
Post a Comment
Read more