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Chess engine: Motor 0.8.0

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Motor - UCI chess engine written in C++ 17 with (768 -> 32) x 2 -> 1 NNUE trained with
Currently requires Clang or GCC/MinGW compiler.
Author: Martin Novák, Ranking Chess Engines Diary CEDR=3673

We are happy that there is another version of this engine (the previous one was released in August). The previous version plays in the 1st League of the best CEDR chess engines and has a rating of 3673! It will be interesting to see how it fares in new tests - these will be available on our website soon.

v.0.8.0:
Progression Tests:
Tests on UHO_Lichess_4852_v1.epd opening book:

Elo   | 39.00 +- 3.67 (95%)
Conf  | 8.0+0.08s Threads=1 Hash=32MB
Games | N: 10002 W: 3176 L: 2058 D: 4768
Penta | [33, 774, 2342, 1746, 106]
Elo   | 38.35 +- 6.32 (95%)
Conf  | 40.0+0.40s Threads=1 Hash=64MB
Games | N: 3002 W: 878 L: 548 D: 1576
Penta | [4, 225, 721, 539, 12]
Test on 8moves_v3.pgn:

Elo   | 18.43 +- 4.42 (95%)
Conf  | 40.0+0.40s Threads=1 Hash=64MB
Games | N: 3000 W: 312 L: 153 D: 2535
Penta | [0, 108, 1134, 249, 9]
Changes
Most changes come from experiments with correction history:
Threat structure correction history
Minor structure correction history (idea from Sirius)
Continuation correction history
New weight formula
Qsearch correction
New network with 8 input buckets
New history table for move ordering indexed by material index

Motor 0.6.0 - results:
Caissa 1.197/23-923 Games
Clarity 7.2.010.5/21+021 Games
Alexandria 7.0.05.5/18-718 Games
Obsidian 13.05/18-818 Games
Lizard 10.56/14-214 Games
Berserk 135/14-414 Games
JigSaw 5.92/13-913 Games
Uralochka 3.41a JA6/12+012 Games
Viridithas 13.0.05.5/12-112 Games
Clover 6.25.5/12-112 Games
Yuliana 5.02.5/12-712 Games
Javelin 2.0.011/11+1111 Games
Lambergar 0.6.010.5/11+1011 Games
Kookaburra 3.001.5/11-811 Games
Bagatur 5.1a9/10+810 Games
Patricia 38/10+610 Games
Chess-System-Tal-24.5/10-110 Games
RubiChess 202401124.5/10-110 Games
Peacekeeper 3.014/10-210 Games
Seer 2.8.04/10-210 Games
Ethereal 14.253.5/10-310 Games

Motor 0.8.0 download


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