Zappa on a 32 threads AMD (Barcelona core)

[Vinvin]

Some crazy numbers, I copied from playchess server :

Zappa Zanzibar X64: 28.7 ply; 24,375kN/s Quad-Core AMD Opteron(tm) Processor 8270 2612MHz, (32 threads)

This one will kill Rybka in any config !

[eriq]

Is it zappa doing the killing or is it the hardware?!

Give me a good program any day. Just my two cents

[Shaun]

I would love to see some games!!!

[Vinvin]

Is it zappa doing the killing or is it the hardware?!

It's Zappa + hardware. Rybka scale badly above 4 cores.

[Nid Hogge]

Wowz

Vincent can you please tell us the player Username in playchess?
Erdo Maybe?

Zappa scales great(If it's middlegame).

[Dann Corbit]

Some crazy numbers, I copied from playchess server :

Zappa Zanzibar X64: 28.7 ply; 24,375kN/s Quad-Core AMD Opteron(tm) Processor 8270 2612MHz, (32 threads)

This one will kill Rybka in any config !

What if Rybka runs on the same machine?

[Dann Corbit]

Some crazy numbers, I copied from playchess server :

Zappa Zanzibar X64: 28.7 ply; 24,375kN/s Quad-Core AMD Opteron(tm) Processor 8270 2612MHz, (32 threads)

This one will kill Rybka in any config !

What if Rybka runs on the same machine?

Looking at the CCRL data, it does not appear that Zappa scales better than Rybka:

1 Rybka 2.2 64-bit 4CPU 3105 +31 -30 73.0% -156.8 38.2% 369 78.4%
Rybka 2.2 64-bit 2CPU 3052 +24 -24 74.3% -172.7 33.4% 665 65.3%
Rybka 2.2 64-bit 2999 +35 -34 70.0% -128.8 47.9% 267 61.6%
2 Zap!Chess Zanzibar 64-bit 4CPU 3044 +27 -26 66.9% -104.4 46.8% 453 62.3%
Zap!Chess Zanzibar 64-bit 2CPU 3032 +65 -64 58.3% -61.1 39.7% 78 64.8%
Zap!Chess Zanzibar 64-bit 2905 +28 -27 55.7% -34.6 52.0% 383 62.3%

[Richard Stickles]

Some crazy numbers, I copied from playchess server :

Zappa Zanzibar X64: 28.7 ply; 24,375kN/s Quad-Core AMD Opteron(tm) Processor 8270 2612MHz, (32 threads)

This one will kill Rybka in any config !

What if Rybka runs on the same machine?

The guys name is Sujay Jagannathan he runs a 8 thread 16 thread 32 thread and 64 thread machines in the engine room

[Zach Wegner]

Looking at the CCRL data, it does not appear that Zappa scales better than Rybka:

1 Rybka 2.2 64-bit 4CPU 3105 +31 -30 73.0% -156.8 38.2% 369 78.4%
Rybka 2.2 64-bit 2CPU 3052 +24 -24 74.3% -172.7 33.4% 665 65.3%
Rybka 2.2 64-bit 2999 +35 -34 70.0% -128.8 47.9% 267 61.6%
2 Zap!Chess Zanzibar 64-bit 4CPU 3044 +27 -26 66.9% -104.4 46.8% 453 62.3%
Zap!Chess Zanzibar 64-bit 2CPU 3032 +65 -64 58.3% -61.1 39.7% 78 64.8%
Zap!Chess Zanzibar 64-bit 2905 +28 -27 55.7% -34.6 52.0% 383 62.3%

To me it does. The 1-4 cpu difference in ELO for Rybka is 106, while in Zappa it is 139. The 2-4 cpu difference for Zappa can be explained by the fact that only 78 games were played.

Zach

[Mike S.]

I would love to see some games!!!

Me too... 24 million nodes per second! And 28.7 ply, is that a depths average from the middlegame?

It would really be interesting if some games, hopefully with eval/depth infos per move, could be retrieved and posted here. I wonder if it ever loses.

(Unfortunately I cannot access the engine room, because my serial numbers expired.)