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Subject: Re: Forced mate position to solve...

Author: Dann Corbit

Date: 10:59:29 01/31/01

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On January 31, 2001 at 13:28:30, leonid wrote:

>Hi!
>
>If you like to solve forced mate, here is the position.
>
>[D]2Q1N1qq/rQ2NPnP/r3qpqk/1Rb1n1qp/3N1nb1/1q1Q1B1R/2QB4/2R1K2R w - -
>
>Please indicate your result... even if your program failed.

Don't know if it is the shortest mate, but crafty found a checkmate in 12
minutes, and guessed the key move right away:

White(1): epdpfga ep.out epp.out
PFGA: EPD record: 1
              time surplus   0.00  time limit 16:39 (16:39) [easy move]
         nss  depth   time  score   variation (1)
                1     0.62   8.93   1. hxg8=N+ Kh7 2. Qxg6+ Nxg6+ 3. Nxe6
                                    Rxe6+
                1->   0.71   8.93   1. hxg8=N+ Kh7 2. Qxg6+ Nxg6+ 3. Nxe6
                                    Rxe6+
                2     1.22     ++   1. hxg8=N+!!
                2     6.79  14.84   1. hxg8=N+ Qxg8 2. Nxg8+ Kh7 3. Qxg6+
                                    Nxg6+ 4. Nxe6 <HT>
                2->   6.94  14.84   1. hxg8=N+ Qxg8 2. Nxg8+ Kh7 3. Qxg6+
                                    Nxg6+ 4. Nxe6 <HT>
                3    29.90     --   1. hxg8=N+
                3     1:19  14.13   1. hxg8=N+ Qxg8 2. Nxg8+ Kh7 3. Ngxf6+
                                    Kh8 4. Qdxb3 Qxc8 <HT>
                3->   1:22  14.13   1. hxg8=N+ Qxg8 2. Nxg8+ Kh7 3. Ngxf6+
                                    Kh8 4. Qdxb3 Qxc8 <HT>
                4     2:07     --   1. hxg8=N+
                4     6:13  13.90   1. hxg8=N+ Qxg8 2. Nxg8+ Kh7 3. Ngxf6+
                                    Kh6 4. Qxg6+ Nxg6+ 5. Nxe6 Qxe6+ 6.
                                    Qxe6 Rxe6+ 7. Qbe4 Bxf3 8. Rxf3 Rxe4+
                                    9. Qxe4 <HT>
                4->   6:38  13.90   1. hxg8=N+ Qxg8 2. Nxg8+ Kh7 3. Ngxf6+
                                    Kh6 4. Qxg6+ Nxg6+ 5. Nxe6 Qxe6+ 6.
                                    Qxe6 Rxe6+ 7. Qbe4 Bxf3 8. Rxf3 Rxe4+
                                    9. Qxe4 <HT>
                5     6:43     ++   1. hxg8=N+!!
                5    11:27  26.26   1. hxg8=N+ Qxg8 2. Nxg8+ Kh7 3. Ngxf6+
                                    Kh6 4. Ng8+ <HT>
                5->  11:28  26.26   1. hxg8=N+ Qxg8 2. Nxg8+ Kh7 3. Ngxf6+
                                    Kh6 4. Ng8+ <HT>
                6    11:37     ++   1. hxg8=N+!!
                6    11:55  Mat12   1. hxg8=N+ Qxg8 2. Nxg8+ Kh7 3. Nexf6+
                                    Qgxf6 4. Nxf6+ Qxf6 5. Qg8+ Kh6 6.
                                    Qh8+ Kg5 7. Qxg6+ Qxg6 8. Bxf4+ Kxf4
                                    9. Qh6+ Qxh6 10. Qd2+ Qe3+ 11. Qxe3+
                                    Kxe3 12. Qe4# <HT>
                6->  11:58  Mat12   1. hxg8=N+ Qxg8 2. Nxg8+ Kh7 3. Nexf6+
                                    Qgxf6 4. Nxf6+ Qxf6 5. Qg8+ Kh6 6.
                                    Qh8+ Kg5 7. Qxg6+ Qxg6 8. Bxf4+ Kxf4
                                    9. Qh6+ Qxh6 10. Qd2+ Qe3+ 11. Qxe3+
                                    Kxe3 12. Qe4# <HT>



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