Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: If you want solve one mate...

Author: Pete Galati

Date: 22:48:47 01/21/01

Go up one level in this thread


On January 22, 2001 at 01:14:32, Uri Blass wrote:

>On January 21, 2001 at 19:39:16, Pete Galati wrote:
>
>>On January 21, 2001 at 19:26:43, Paul wrote:
>>
>>>On January 21, 2001 at 19:24:32, Pete Galati wrote:
>>>
>>>>On January 21, 2001 at 19:17:18, Paul wrote:
>>>>
>>>>>On January 21, 2001 at 19:14:08, John Coffey wrote:
>>>>>
>>>>>>On January 21, 2001 at 16:56:42, Paul wrote:
>>>>>>
>>>>>>>On January 21, 2001 at 11:56:09, leonid wrote:
>>>>>>>
>>>>>>>>Hi!
>>>>>>>>
>>>>>>>>This mate position is very handy when you want to check the limits in your
>>>>>>>>program. It is amusing also. Number of legal moves for both sides is slightly
>>>>>>>>over one hundred.
>>>>>>>>
>>>>>>>> knq3q1/rq1q1qbQ/Qq2Q3/1Qn1Q2B/Q1qN1Q1r/4K1B1/1q4QR/1N1q3Q white to go.
>>>>>>>>
>>>>>>>>If you will solve, it will be nice if you will indicate your result.
>>>>>>>>
>>>>>>>>Thanks,
>>>>>>>>Leonid.
>>>>>>>
>>>>>>>Hi again Leonid!
>>>>>>>
>>>>>>>It took my program 45 minutes ... phewwwwwww!
>>>>>>>Here's the line, a mate in 12:
>>>>>>>
>>>>>>>1. Qxa7+ Qxa7 2. Qxa7+ Kxa7 3. Qeb6+ Ka8 4. Qgxb7+ Qdxb7 5. Qxb8+ Qxb8
>>>>>>>6. Qxb8+ Qxb8 7. Q6a5+ Na6 8. Qaxa6+ Qa7 9. Qg8+ Bf8 10. Qxf8+ Qe8+
>>>>>>>11. Qfxe8+ Qc8 12. Qxc8x
>>>>>>>
>>>>>>>I think I'm going to skip your next problem, that will be too difficult
>>>>>>>for me ;)
>>>>>>>
>>>>>>>Greetings,
>>>>>>>Paul
>>>>>>
>>>>>>Fritz 6 has been thinking for 3 hours and 45 minutes, shows no analysis and
>>>>>>still says 1/1 ply.  I wonder what is happening with the transposition table,
>>>>>>:-).
>>>>>>
>>>>>>John Coffey
>>>>>
>>>>>:)
>>>>>
>>>>>It's the QSearch blowing up, you have to control that somehow ...
>>>>>and that's easier when you're the author of the program in question :)
>>>>>
>>>>>Paul
>>>>
>>>>I'd try rebooting and try again.  Something sounds broken with searching on a
>>>>position for 3 hours and being at 1/1 ply.  That's just not right (Louie
>>>>Anderson impression).
>>>>
>>>>Pete
>>>
>>>Well, I *was* waiting for your solutions from Comet & Junior ...
>>>or have you been rebooting al this time ;)
>>>
>>>Paul
>>
>>Oops, I must be becoming known for what I run analysis through, but I figure
>>everyone else will use Fritz and Crafty etc., so why should I?
>
>It is not truth.
>
>I used Junior to find the mate in 12 line and not Fritz and Crafty.

It was a generalization.  Fritz and Crafty seem to be the most common.

>
>Fritz and Crafty are not good programs to use in complicated positions when both
>sides have 9 queens.

I'll try to remember that next time I see 9 queens.

>
>
>>
>>Actually, I've been running Junior on that other position that you pasted in
>>that you said you gotta go deep to get an answer on, and Junior doesn't seem to
>>be coming up with anything (that I know of)'
>
>>
>>New position
>>5n2/B3K3/2p2Np1/4k3/7P/3bN1P1/2Prn1P1/1q6 w - - 0 1
>
>You seem to use always the wrong program.

I tend to use what ammuses me the most at the moment.  Not the best way to do
it.

>Junior is the wrong program to solve mate in 30 when Rebel solves it with no
>problems.
>
>Uri

I agree.  I gave up.  Actually, I didn't know that Rebel solved it in mate in 30
moves when I started.  He said it was deep, so I figured that Junior searched
about as fast as anything I had, but I only have so much time.

I'm trying to be carefull about which Chess programs end up on this computer, so
I'm not going to have a Chess program that's ideal for every position.

Pete



This page took 0.01 seconds to execute

Last modified: Thu, 07 Jul 11 08:48:38 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.