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Subject: Re: Mate to solve in two flavours.

Author: Paul

Date: 15:47:26 05/07/01

Go up one level in this thread


On May 07, 2001 at 18:21:08, Paul Byrne wrote:

>On May 07, 2001 at 17:48:03, Paul wrote:
>
>>On May 07, 2001 at 16:23:20, leonid wrote:
>>
>>>Hello!
>>>
>>>And how about solving mate in two variations? We will start with female side.
>>>Contain more esthetic and demand very gentle approach.
>>>
>>>[D]Qn1q1nQ1/1QNbNQ2/1qqkqq2/1QrqrQ2/1q1N1q2/3q4/B1RbR1B1/B2K2B1 w - -
>>
>>Hullo!
>>
>>Mate in 8 in half a minute ...
>>
>>00:27 WM8 06 Ne8+ Qxe8 Nc8+ Qexc8 Qgxf8+ Qfe7 Q7xe6+ Rxe6 Rxe6+ Qxe6 Qxe6+ Bxe6
>>Qbxe7+ Ke5 Nxc6#
>
>G2K says:
>1W. i=9769 n=301215 p=0 d=1000000000 t=4.780
>1W. Ne8 wins!
>
>You got me curious so I had G2K dump a complete solution tree this time and
>picked out the longest line, which was:
>
>1. Ne8 Qxe8 2. Qaxb8 Qbc7 3. Nc8 Qxc8 4. Qgxf8 Qfe7 5. Q5xe6 Qxe6 6. Q5xc6 Bxc6
>7. Q8xc7 Qxc7 8. Qxe6 Rxe6 9. Rxe6 Kd7 10. Qfc8
>
>
>>>Second is almost the same position but contain slight genetical modification. It
>>>expect from you more brute force in order to reach the same result.
>>>
>>>[D]Qn1q1nQ1/1QNbNQ2/1qqkqq2/1QrqrQ2/1q1N1q2/3q4/3b4/Q2K2Q1 w - -
>>
>>Mate in 11 in half an hour, don't know the exact time, as the job ran in the
>>background, the solution looks a bit like the unlocking of a safe ... nice :):
>>
>>29:57 WM11 09 Ne8+ Qxe8 Nc8+ Qexc8 Qgxf8+ Qfe7 Q7xe7+ Qxe7 Qaxb8+ Qbc7 Qgg6+ Re6
>>Q8xc7+ Q8xc7 Qxc7+ Qxc7 Qaa6+ Bc6 Qgxe6+ Qxe6 Qxe6#
>
>Here I got
>
>1W. i=51133 n=1222688 p=0 d=1000000000 t=19.220
>1W. Nc8 wins!
>
>and
>
>1. Nc8 Qxc8 2. Ne8 Qcxe8 3. Qgxf8 Qfe7 4. Qaxb8 Qbc7 5. Q8xe7 Q8xe7 6. Qxe7 Qxe7
>7. Q7xc7 Qxc7 8. Qbxd7 Qxd7 9. Qbf8 Qe7 10. Qgg6 Re6 11. Qfxe6 Qxe6 12. Qxe6
>
>-paul

Paul, this is impressive stuff ... geezzz ... 19.2 seconds? ... ok, I quit!

Paul (who'll be back :)




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