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Subject: Re: It is a mate in 8

Author: John Merlino

Date: 20:15:40 06/19/00

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On June 19, 2000 at 19:53:45, Paulo Soares wrote:

>On June 19, 2000 at 15:16:02, Olaf Jenkner wrote:
>
>>>[D] rr4k1/pp2pp1p/q2p2p1/2pP3n/2P5/2BQP2R/PP3P2/2K4R w - - 0 19
>>>
>>>PS. Is this a forced mate? If so, how many moves exactly?
>>>
>>>--
>>>GCP
>>
>>
>>1.Rxh5  gh  2.Rxh5 Kf8 3.Rxh7 Ke8 4.Qf5 Kd8 5.Qxf7 Kc8 6.Qe8+ Kc7 7.Qe7+ Kb6
>>8.Qxd6#
>>                                            5. ... Qc6 6.Qe7+ Kc8 7.Qe6  Kd8
>>8.Bf6#
>>                                                                  7. ... Qd7
>>8.Qxd7#
>>                       3....e6/e5 4.de  Ke7 5.Rxf7+ Kd8 6.Qh7 Qc6 7.Rf8+ Qe8
>>8.Qd7#
>>                                  4.... Ke8 5.ef+   Kf8 6.Qg6 Ke7 7.f8Q+ Kxf8
>>8.Qf7#
>>                                                        6....Qxc4 7.Qg8+ Ke7
>>8.f8Q#
>>                                            5. ...  Ke7 6.Qe4+Kf8 7.Qe6  --
>>8.Rh8#
>>                                  4.... Qc6 5.Rxf7+ Ke8 6.Qh7 Kd8 7.Rd7+ Qxd7
>>8.Qxd7#
>>                                                                  7....  --
>>8.Qh8#
>>1. ... Kf8  2.Rxh7 Ke8 3.Rxf7 Qxc4 4.Qxc4 g5?  5.Qe4  Kf7 6.Qf6+ -- 7.Rh8#
>>                                   4. ... Kxf7 5.Rh7+ Ke8 6.Qe4 Kd8 7.Qxe7+ Kc8
>>8.Qc7#
>>
>>OJe
>
>What program do you use to analyse this mate?
>
>Paulo Soares, from Brazil

Chessmaster 7000 finds Mate in 9 in 2 seconds on a P3-400:

1. Rxh5 Kf8 2.Rxh7 Ke8 3.Rxf7 Qxa2 4.Rxe7+ Kxe7 5.Qe4+ Kd8 6.Rh8+ Kd7 7.Qe6+ Kc7
8.Rh7+ Kd8 9.Qd7++

It then finds Mate in 8 after 3:37:
1. Rxh5 Kf8 2.Rxh7 Ke8 3.Rxf7 Qxa2 4.Qe4 Qa1+ 5.Kd2 e5 6.Qxg6 Qd1+ 7.Rxd1 Kd8
8.Qg8++

jm



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