It is a very dynamic, amorphous and constantly improving project. There is no clear one best compile or release, but there may be a 'best' for your configuration. And even if there were one best, it would be overtaken in a week by a newer, better version. Once the project reaches its goal, I think ...

Give the guy a break. He just released on a date he said he would. "What's next?" Wow.

Can someone tell me please which CPU_x is used for i7 920? It's 4 physical cores but 8 logical cores. So do I use 4 or 8 Houdini for my 64-bit Win7?

I want to create a gauntlet of top engines. Inspired by this site , I want to create a murderer's row against which I can pit a new engine to see how it stacks up. After testing, for a couple of days at 1+1, of course.

Questions:

Does it make sense to use the 'older' engines on the website? Yes ...

Has anyone actually tested it against DR4 or even 1.71 for over 100 games before giving an opinion based on fact instead of wishes?

Found this independently.

http://homepages.tesco.net/henry.ablett/jims.html

What time controls do you like to see your engine tested at, Robert? I understand the statistical reasons for thousands, not hundreds. Do you like 1+0, 1+1? Something more? What would benefit you, and against what opponent?

Thank YOU for coming up with settings like that. Must have required a lot of trial and error.

My testing mirrors yours. I used 1000 test positions for each.

STS - 10 sec

%age
Ivan57dSSE4.2Arena 96 96 93 86 91 90 90 80 85 91 898
Ivan57dSSE4.2Arena (mod) 99 89 88 93 92 90 89 83 85 94 902

Speed
Ivan57dSSE4.2Arena 57 83 81 164 118 134 147 277 207 100 1368
Ivan57dSSE4.2Arena (mod) 58 134 149 ...

Your modifications increase time to solve following position. Default settings: 2 minutes. Mods: 6 minutes.

r2qrb1k/1p1b2p1/p2ppn1p/8/3NP3/1BN5/PPP3QP/1K3RR1 w - - bm e5

I see no benefit in my fast, incomplete tests for the changes.

mod12c is considered the best Ivanhoe so far (or one of them). 57a has been out for less than 12 hours. If you want to know if it's better, help test it.

Speaking of tests:

1: Houdini 102_x64_POPCNT_4CPU 87.0/150 63-39-48
2: Deep Rybka 4 SSE42 x64 63.0/150 39-63-48

Level: Blitz 2/1
Hardware ...