Slow Rybka.

[Louis F]

I have just installed the engine Rybka v2.3.2a.w32 to my ChessBase 9.0 GUI but when I fire it up it only searches at about 100 kN/s whereas Fritz 10 and Junior 10 run at 1000-1800 kN/s. Is Rybka supposed to run this slow? I have a Dell Inspirion 531 with an AMD Athlon 64 X2 Dual Core Processor 3800+ running at 2.01 GHz with 958 MB RAM. I set the hash table size at 150 MB. Should I have installed the Rybka v2.3.2a.x64 engine instead?

[cooldalek]

no - rybka counts nodes differently to other engines. Your engine is working fine

[Vempele]

Should I have installed the Rybka v2.3.2a.x64 engine instead?

Yes. If it doesn't work, you'll know your Windows is 32-bit. If it does, it'll be 60% faster than the 32-bit version.

[Mike S.]

Even if engines count the nodes identically (or almost), the ratio between node rates can be up to ~10:1 for engines of similar strength. Some years ago I have compared Fritz and Junior to Hiarcs and King, and the typical node rade ratio between the "high node rate" and "low node rate" engines was 9:1, IIRC. But they were close in strength.

(At least there never was any rumour that these node counts were done much differently.)

I have a chess computer which calculates 2 nodes/sec. Not 2 kN/s (2000), only TWO nodes per second! Still, it can play chess at ~1500 Elo level.

[Rubinus]

Depth, not nodes is feature. Not slowly than most opponents.
Depth+1 - Rybka is fastest. But somewhere will not change halfvariant.

[tjfroh]

Mr. Fagliano,

I have an Intel E-6850 that runs Rybka 2.3.2a LK 64bit at about 220 KNPS on a Cyberpower machine with 2 GBs of RAM under
Windows Vista Home Premium 64 bit. The 32 bit version runs about the same nodes per second.

Vas Rajlich knows that his node counter counts about 1/10th as many nodes as Junior or Shredder. He also knows that Rybka kills
those programs.

When you upgrade your computer in one or two years, Rybka 3.x will run at about 800 to 1000 KNPS because of the processor speedup.

Enjoy,

TJ

[Louis F]

Vas Rajlich knows that his node counter counts about 1/10th as many nodes as Junior or Shredder. He also knows that Rybka kills
those programs.

I'm glad to know that my Rybka engine is working fine. But I thought a node was a node. How can one node counter count a node differently that another?

[M ANSARI]

If you want to improve your Knps to around 500 Knps on Rybka ... you can do it for around $500 if you already have a running system. Win XP64bit is the OS of choice for Rybka MP.

http://64.68.157.89/forum/viewtopic.php?t=15997

[Terry McCracken]

If you want to improve your Knps to around 500 Knps on Rybka ... you can do it for around $500 if you already have a running system. Win XP64bit is the OS of choice for Rybka MP.

http://64.68.157.89/forum/viewtopic.php?t=15997

How much for a whole new system? Without making serious compromises but getting the best bang for your buck?

I'm afraid I'm a bit behind the times

Terry

[Gandalf]

I'm glad to know that my Rybka engine is working fine. But I thought a node was a node. How can one node counter count a node differently that another?

This has been discussed a few times on the Rybka forum, you might want to read this topic and/or run a search for the others.