Author: Pete Galati
Date: 16:51:06 01/18/01
Go up one level in this thread
On January 18, 2001 at 19:13:22, Paul wrote:
>On January 18, 2001 at 19:01:08, Pete Galati wrote:
>
>>On January 18, 2001 at 18:44:05, leonid wrote:
>>
>>>Hi!
>>>
>>>If you would like to find a mate here is one position. It is very easy to solve
>>>but not that simple to find shortest mate.
>>>
>>>I failed here even in 3 hours to find shortest mate through brute force search.
>>>Maybe you will have better chance.
>>>
>>> 1k4q1/1pppPr2/PbbP1N1n/QP2rn1R/1q6/1q2RBB1/q1q2PPP/6NK black to go
>>>
>>>Leonid.
>>
>>Is this the right position?
>>
>>[D]1k4q1/1pppPr2/PbbP1N1n/QP2rn1R/1q6/1q2RBB1/q1q2PPP/6NK b - - 0 1
>
>If so, then mine says it's a mate in 10 for black starting with Nxg3+ ...
>It looks like a daily reverse auction ... Anyone lower, anyone? :)
>
>Paul
Crafty seems to say the same thing. I haven't run these moves passed a board to
check to see if it really IS a forced mate, but I assume it is since Black keeps
white in check the whole time. Just over 3 minutes. 48mb hashtable fwiw.
Pete
8 3:13 -Mat10 1. ... Nxg3+ 2. hxg3 Rxh5+ 3. Nxh5
Qh4+ 4. gxh4 Qxg2+ 5. Bxg2 Bxg2+ 6.
Kh2 Ng4+ 7. Kg3 Qxf2+ 8. Kxg4 Bh3+
9. Nxh3 Qf5+ 10. Kg3 Qxe3#
8-> 3:40 -Mat10 1. ... Nxg3+ 2. hxg3 Rxh5+ 3. Nxh5
Qh4+ 4. gxh4 Qxg2+ 5. Bxg2 Bxg2+ 6.
Kh2 Ng4+ 7. Kg3 Qxf2+ 8. Kxg4 Bh3+
9. Nxh3 Qf5+ 10. Kg3 Qxe3#
9 5:45 -Mat10 1. ... Nxg3+ 2. hxg3 Rxh5+ 3. Nxh5
Qh4+ 4. gxh4 Qxg2+ 5. Bxg2 Bxg2+ 6.
Kh2 Ng4+ 7. Kg3 Qxf2+ 8. Kxg4 Bh3+
9. Nxh3 Qf5+ 10. Kg3 Qxe3#
9-> 17:39 -Mat10 1. ... Nxg3+ 2. hxg3 Rxh5+ 3. Nxh5
Qh4+ 4. gxh4 Qxg2+ 5. Bxg2 Bxg2+ 6.
Kh2 Ng4+ 7. Kg3 Qxf2+ 8. Kxg4 Bh3+
9. Nxh3 Qf5+ 10. Kg3 Qxe3#
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