Computer Chess Club Archives




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

Author: John Coffey

Date: 16:14:08 01/21/01

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On January 21, 2001 at 16:56:42, Paul wrote:

>On January 21, 2001 at 11:56:09, leonid wrote:
>>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.
>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 ;)

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

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