Rebel 15

In 1980 my wife said to me : search yourself a hobby. I did, bought the TRS-80 and from one thing came another.

Rebel 15


1. New and stronger neural network made from

1.87 billion positions.


2. Estimated strength increase over Rebel 14.2 emulating

CCRL 40/2 testing in the range of 80-130 elo.


3. There are 2 versions of Rebel 15


. Rebel-15-avx2 for modern computers

. Rebel-15-sse   for somewhat older computers.


Use Rebel-15-avx2 wherever possible since it

runs considerable faster.


     Credits


  • Fabien Letouzey, Thomas Gaksch and Jerry Donald Watson for Toga.


  • Chris Whittington for introducing me into NNUE, providing me with the necessary tools and writing the NNUE interference code.
  • Thorsten Czub for testing Rebel 15.


  • Rebel 15 is released under the GPLv3 licence.

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REBEL 15x2

Double sized neural network

x2 stands the multiplication of the neural net with a factor of 2 from 22Mb to 44Mb. Rebel 15x2 is not meant as a new elo bomb but as a final touch of Rebel 15 and investment for a future Rebel.


Because of the double sized network (based on 2.75 billion positions) Rebel has much more chess knowledge available which can be easily demonstrated by playing a match on depth instead of regular time control. The match ended in favor for the x2 version with a 58% score indicating a 56 elo increase.


However there is an important drawback, because of the bigger neural network the NPS has dropped significantly, depending on your PC with 25% - 35% which has to be compensated by the better chess knowledge hence the elo gain is not much. On the other hand it makes Rebel 15x2 much more suitable as an analysis engine and an excellent starting point for creating an even better neural network.

Rebel 15x2

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REBEL 15.1

New network architecture


1. New network architecture, version 10.

2. Increased data set from 2.75 billion positions to 3.6 billion positions.

3. Search improvements.

4. Estimated elo gain based on GRL testing ~56 elo.

5. Rebel 15.1 development diary.

Rebel 15.1

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REBEL with Jeroen Noomen opening book

Match results against various popular opening books

BOOK

SIZE

GAMES

SCORE

Performance.bin

1.4 Mb

800

65.1%

ProDeo.bin

4 Mb

800

65.5%

Komodo.bin

9 Mb

800

62.3%

Cerebellum.bin

173 Mb

800

55.7%

Echidna.bin

308 Mb

800

57.8%

Opponents

CCRL

CEGT

Berserk 6

3429

3347

Ethereal 12.75

3396

3322

Rubichess 2.2

3445

3376

Houdini 6.03

3440

3357

Rebel Engine

 version 15.1a

Rebel book size

243 Kb

Time control

40/40

The Noomen book comes with the latest neural network (as Rebel 15.1a) estimated 15-20 elo stronger, pre-installed and ready to use in Arena 3.0


Get the lastest ARENA inferface. ARENA is copyrighted © by Martin Blume and its distribution is limited to the official ARENA website only.

It's adviced to install Rebel-15.1a into the root of the C-drive else modify the polyglot.ini file in the engine folder accordingly.

PGN 4000 games

Rebel with Noomen Book

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Last modification August 20, 2022