The Week in Chess

Monday, August 27, 2018

ShashChess 180822: Tal, Petrosian & Capablanca Rumble

The last post showed that Shash is not stronger than most of Stockfish clones including the original. I was curious how the famous world champions strength are translated by making a separate compile for each character and then mix each one. 

The results are interesting: Petrosian ranks higher than Tal and Capablanca. Overall, the combination of Tal + Petrosian scored the highest, beating the default Shash character by 1.25% ELO.

This is not the ultimate ranking for Shash but just a snapshot of how its characters strength manifest in a small tournament. It needs to have more rounds to have a definite conclusion. But even so, I can be sure that Capablanca's style is the weakest with a huge difference in ELO rating of 46.15% from the second last placer. 

Tournament conditions:
Tournament manager: cutechess-cli 1.0
Time control: 60/60+1

Time margin: 1 second
Option.Threads: 1 
Opening: 100 positions
Rounds: 200, repeat each position for black and white
Win score: 200
Draw score: 20 

Concurrency: 32

Rank Chess Engine ELO Games Score%  Win%  Draw% Loss%
1 Shash 180822 TalPet  20.30 1400 53.29 25.50 55.60 18.90
2 Shash 180822 default  12.59 1400 52.04 22.93 58.20 18.87
3 Shash 180822 CapPet  10.83 1400 51.75 24.00 55.50 20.50
4 Shash 180822 Petrosian  10.17 1400 51.64 22.71 57.90 19.39
5 Shash 180822 TalCap  7.53 1400 51.21 24.07 54.30 21.63
6 Shash 180822 TalCapPet  0.93 1400 50.14 23.07 54.10 22.83
7 Shash 180822 Tal  -8.09 1400 48.68 22.29 52.80 24.91
8 Shash 180822 Capablanca  -54.26 1400 41.25 14.21 54.10 31.69
 

Download the Shash 180822 engines here. 
Download the tournament games here.

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