The Week in Chess

Sunday, May 4, 2014

Strelka 6 - Test Gauntlet Matches, 100 Rounds 10S + 500MS

Another user requested for a test of the latest release of Strelka 6 which he says was so strong. I was reluctant to test immediately because it is a 32 bit release with 1 CPU support and hoped that a better version will follow immediately. Days passed and nothing better released and then this request came. Well, in the meantime I will have a quick test with this castrated version of Strelka to assess how strong it really is. 

The first opponent of Strelka 6 was an older version of itself, which is 5.7. It won with a score of 56-44. The second opponent was Gull 3 which is a few ranks higher in the rating list. Gull won with a 52-48 score. This could mean that the estimated ELO rating of this Strelka 6 version is between Gull and Critter ELO ratings. 

I think Juri Osipov the author, is hiding the true strength of Strelka 6 in preparation for the possible surprise offensive against the strongest chess engines. According to a post in, Strelka 6 code was based from Houdini 4 with some changes in the PST, material imbalance table is built-in and also has a built-in database of positions reached in decisive LTC games. If this is true, the true strength of the full Strelka 6 64-bit multi-core version will at least be equal with Houdini 4. The chess engines scene looks very interesting indeed in the future.

Here is the 2 short time control matches of Strelka 6:

Strelka 6 w32 vs. Strelka 5.7 x64 - Match 100R 10S+500MS
1Strelka 6 w32 56.0/100· ·· ·· ··32-20-48 2464.00 
2Strelka 5.7 x6444.0/10020-32-48· ·· ·· ·· 2464.00 

100 games played / Tournament finished

Tournament start: 2014.05.04, 14:17:30
Latest update: 2014.05.04, 17:59:17
Level: Blitz 0:10/0.5

Strelka 6 w32 vs. Gull 3 x64 - Match 100R 10S+500MS
1Gull 3 x64 52.0/100· ·· ·· ··31-27-42 2496.00 
2Strelka 6 w3248.0/10027-31-42· ·· ·· ·· 2496.00 

100 games played / Tournament finished

Tournament start: 2014.05.04, 14:22:01
Latest update: 2014.05.04, 17:50:07
Level: Blitz 0:10/0.5
Hardware: Intel(R) Core(TM)2 CPU 4300 @ 1.80GHz with 3.9 GB Memory
Operating system: Windows 7 Ultimate Professional Service Pack 1 (Build 7601) 64 bit
Table created with: Arena 3.5

Download the gauntlet matches PGN games here.

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