Search found 17077 matches

by bob
Wed Jul 18, 2007 11:24 pm
Forum: Computer Chess Club: General Topics
Topic: Opteron versus Xeon
Replies: 23
Views: 8289

Re: Opteron versus Xeon

It would not be a nanoprocessor. A 16 nanometer "process" (not processor) doesn't mean the cpu is 16 nanometers in size. Think about it; you can easily see the cpu in your computer without a microscope. You didn't read what I wrote. I said a true nanoprocessor would use a 1 nanometer process, not 1...
by bob
Wed Jul 18, 2007 8:09 pm
Forum: Computer Chess Club: General Topics
Topic: Opteron versus Xeon
Replies: 23
Views: 8289

Re: Opteron versus Xeon

I read that Intel will be moving to 32 nano meter process at their site! Revolutionary Regards, Terry Yes, although not that fast. 45nm is next and should arrive soon(Q407-Q108), Then there's another 45nm based on a new Arch(Nehalem), And then probably by Very late 2009 we start seeing 32nm westmer...
by bob
Wed Jul 18, 2007 3:57 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Where to put timeout() code in search?
Replies: 14
Views: 7544

Re: Where to put timeout() code in search?

mine is right at the top of Search(). And when time runs out, I set a global flag that says "do not use any scores returned by search from here on, as the search is "unwinding" and the values are all incomplete except for the score already returned to the root.
by bob
Wed Jul 18, 2007 3:55 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: caps->noncaps vs. goodcaps->noncaps->badcaps
Replies: 22
Views: 10352

Re: caps->noncaps vs. goodcaps->noncaps->badcaps

Some time back I changed the move ordering in Prophet to just try all captures before noncaptures are even generated. However, I continue to read that many (most?) defer losing captures until after the noncaptures have been tried. So, I decided to give it another try. Below are the node counts from...
by bob
Tue Jul 17, 2007 8:12 pm
Forum: Computer Chess Club: General Topics
Topic: Test position
Replies: 13
Views: 5339

Re: Test position

It looks like 18...Nxd5 is good for a draw only, and probably a silent move like Bb7 may be better. But it is somewhat tricky, because after 18... Nxd5 19.Nxd5 Qxg5 20.Nxc7 f4, and again after 21.g4 Qh4, White does not have time to capture one of the rooks because of mate. But if he plays 22.Nb3 wh...
by bob
Tue Jul 17, 2007 5:40 pm
Forum: Computer Chess Club: General Topics
Topic: Test position
Replies: 13
Views: 5339

Re: Test position

what is the punch line after Nxd5 Nxd5??? It looks like 18...Nxd5 is good for a draw only, and probably a silent move like Bb7 may be better. But it is somewhat tricky, because after 18... Nxd5 19.Nxd5 Qxg5 20.Nxc7 f4, and again after 21.g4 Qh4, White does not have time to capture one of the rooks ...
by bob
Tue Jul 17, 2007 3:27 pm
Forum: Computer Chess Club: General Topics
Topic: Test position
Replies: 13
Views: 5339

Re: Test position

what is the punch line after Nxd5 Nxd5???
by bob
Mon Jul 16, 2007 3:32 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: testing engines as fast as possible at depth 1
Replies: 6
Views: 3639

Re: testing engines as fast as possible at depth 1

Ross Boyd wrote:Download Winboard or Winboard_X source, disable/remove all board display/updating and recompile.

That's probably the easiest way - and you can still use an existing WB tournament manager to run it all.

Cheers,
Ross
that is a _difficult_ assignment.
by bob
Fri Jul 13, 2007 3:08 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: iterative deepeniing and branching factor
Replies: 32
Views: 14380

Re: iterative deepeniing and branching factor

what am I missing? white plays Rh1. Nh5 appears to just lose the knight to g4. Any knight move is embarassed by Qh8. Why would you want to penalize the position after Rh1, as opposed to the position _before_ rh1 is played??? The point is that after 1..Nh5 the huge king safety bonus (at least in my ...
by bob
Thu Jul 12, 2007 7:24 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: iterative deepeniing and branching factor
Replies: 32
Views: 14380

Re: iterative deepeniing and branching factor

what am I missing?

white plays Rh1. Nh5 appears to just lose the knight to g4. Any knight move is embarassed by Qh8.

Why would you want to penalize the position after Rh1, as opposed to the position _before_ rh1 is played???