Stockfish 15 is ready

[mehmet123]

Stockfish 15 was published about 6 months after the release of Stockfish 14.1
https://abrok.eu/stockfish/

Regression tests shows 36.69 elo progress at 60 sec +0.6 sec tc / 1 core/ 8 moves v3.pgn and 26.09 elo progress at 30 sec +0.3 sec tc / 8 cores/8 moves v3.pgn
https://github.com/glinscott/fishtest/w ... sion-Tests.

[Andrew]

Have they fixed the search explosion problem that has been mentioned here a number of times?

Andrew

[bnst]

Have they fixed the search explosion problem that has been mentioned here a number of times?

Andrew

I reported such a problem with position:
r3r1k1/2qb1pp1/pp2n1np/2p1P3/2R1N3/1B3N1P/PP1Q1PP1/4R1K1 w - - bm Nf6+;
Stockfish 15 at least behaves nicely on this one.

Regards
anst

[Andrew]

Thanks Anst, I'll search for some of the other reported positions in the next few days and see how they go.

Andrew

[Modern Times]

Regression tests shows 36.69 elo progress at 60 sec +0.6 sec tc / 1 core/ 8 moves v3.pgn and 26.09 elo progress at 30 sec +0.3 sec tc / 8 cores/8 moves v3.pgn
https://github.com/glinscott/fishtest/w ... sion-Tests.

What do they measure those gains with - Ordo or Bayeselo ?

[mehmet123]

What do they measure those gains with - Ordo or Bayeselo ?

Stockfish Team use Bayeselo for elo measure.

[Modern Times]

Stockfish Team use Bayeselo for elo measure.

Thanks, happy to hear that. So the ratings lists that use Ordo will be showing gains of more than the +37 Elo stated, depending on test conditions.

[Jouni]

Stockfish speed is going down steadily. 6 core bench i5:

SF14 14,4 Mnps
SF14.1 13,1 Mnps
SF15 11,0 Mnps

I really miss classic or asmfish .

[Modern Times]

Stockfish speed is going down steadily. 6 core bench i5:

SF14 14,4 Mnps
SF14.1 13,1 Mnps
SF15 11,0 Mnps

I really miss classic or asmfish .

I'm not seeing that slowdown with SF15 here, not on the standard bench command anyway (1 thread). Just a tiny bit slower than 14.1, maybe 1-2%, if at all.

[Modern Times]

Well it varies a bit between runs, on 12 threads here:

14.1 - 26.7 Mnps
15 - 25.6 Mnps

So 4-5%