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Subject: Re: The Babson Task

Author: Uri Blass

Date: 16:24:57 10/22/03

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On October 22, 2003 at 16:05:35, Kelly Fergason wrote:

>On October 22, 2003 at 15:50:50, Darren Rushton wrote:
>
>>[D] Bq1B1K2/3PpN2/P3Pp2/P1p2P2/2Pk1b1R/1p6/pN1P1P2/QR6 w - - 0 1
>>
>>'If I could take one diagram to a desert island, it would be this one.'
>>
>>Leonid Yarosh - Mate in 4
>>1st Prize Shakhmatyi v SSSR 1983
>>
>>Here are the main variations of the solution recapitulated:
>>
>>1.a7!
>>1...axb1=Q 2.axb8=Q Qxb2(!) 3.Qxb3 Qc3 4.Qxc3 mate
>>                                     Qe4(!) 3.Qxf4 Qxf4 4.Rxf4 mate
>>1...axb1=R(!) 2.axb8=R! Rxb2(!)3.Rxb3 Kxc4 4.Qa4 mate
>>                       2.axb8=Q? Rxb2! 3.Qxb3 stalemate
>>1...axb1=B(!) 2.axb8=B! Be4(!) 3.Bxf4 B- 4.Be3(5) mate
>>                       2.axb8=Q? Be4! 3.Qxf4 stalemate
>>1...axb1=N(!) 2.axb8=N! Nxd2(!) 3.Qc1! Ne4 4.Nc6 mate
>>                       2.axb8=Q? Nxd2! 3.Qxf4+ Kc3 4.??
>>                                                     3.Rxf4+ Ne4 4.??
>>                                                     3.Qc1 Ne4 4.??
>>
>>What do Fritz and friends make of this one?
>>
>>Regards,
>>
>>Daz
>
>
>
>
>New game
>Bq1B1K2/3PpN2/P3Pp2/P1p2P2/2Pk1b1R/1p6/pN1P1P2/QR6 w - - 0 1
>
>Analysis by Junior 8:
>
>1.Qxa2 bxa2 2.Re1 Bxd2
>  +-  (16.23)   Depth: 3   00:00:00
>1.Rbh1 Qb4 2.Rxf4#
>  +-  (26.91)   Depth: 3   00:00:00
>1.Nd1+ Kd3 2.Qc3+ Ke2 3.Bf3+ Kf1 4.Rxb3
>  +-  (27.06)   Depth: 3   00:00:00  2kN
>1.Nd1+!
>  +-  (27.36)   Depth: 6   00:00:00  9kN
>1.Nd1+ Kxc4 2.Qc3+ Kb5 3.Qxb3+ Kxa6 4.Bb7+ Qxb7 5.Qxb7#
>  +-  (#5)   Depth: 6   00:00:00  96kN
>1.Re1 Qe5 2.Nxe5 fxe5 3.Re4#
>  +-  (#3)   Depth: 6   00:00:00  106kN
>1.Re1 Qe5 2.Nxe5 fxe5 3.Re4#
>  +-  (#3)   Depth: 6   00:00:00  109kN
>
>(Fergason, 1.5Ghz, 512Mb, 192Mb hash, 22.10.2003)

Re1 Qxd8+ with draw by stalemate.

Uri



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