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Subject: Re: Terry is right. Qxe7 looses...

Author: John Merlino

Date: 12:10:42 11/25/02

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On November 25, 2002 at 12:56:59, Joachim Rang wrote:

>On November 24, 2002 at 23:56:30, Terry McCracken wrote:
>
>>[D]8/4p3/4Q3/8/8/k1p3PP/1q3P1K/8 w - - 0 1
>>
>>This is reposted as it was given little attention.
>>
>>
>>http://www.talkchess.com/forums/1/message.html?266990
>
>yep, Terry is right! You can easily try it for yourself, by let the engines play
>against themselves. Althoug many engines show a drawish score in the beginning,
>they realize after a few moves, that white is going to loose. But you have at
>least give the engines 1 minute per move:
>
>Here are a few winning lines:
>
>New game
>Shootout (Ruffian1)
>
>1.Qxe7+ Ka2 2.Qe6+ Kb1 3.Kg2 c2 4.Qe4 Qb5 5.Kh2 Kb2 6.Qd4+ Ka2 7.Qa7+ Kb1 8.Qh7
>Qd5 9.Kg1 Kb2 10.Qh8+ Ka2 11.Qh6 Qd1+ 12.Kg2 c1Q+- 0-1
>
>New game
>Shootout (ChessTiger14)
>
>1.Qxe7+ Ka2 2.Qe6+ Qb3 3.Qa6+ [3.Qe2+ c2 4.f4 Kb2 5.g4 Qd5 6.Qf2 Kc3 7.Qe3+ Qd3
>8.Qc5+ Kd2 9.Qb4+ Ke3 10.Qc5+ Kxf4 11.Qf2+ Ke4 12.Qf5+ Ke3 13.Qc5+ Kd2 14.Qb4+
>Ke2 15.Qe7+ Qe3 16.Qxe3+ Kxe3+-] 3...Kb2 4.Qf6 Kb1 5.Qf5+ c2 6.Qe4 Ka2 7.Qc6 Kb2
>8.Qf6+ Qc3 9.Qb6+ Kc1 10.Qe6 Kd2 11.Qd5+ Qd3 12.Qa5+ Ke2 13.Qc5 Qd1 14.Qe3+ Kf1
>15.Qe4 c1Q+- 0-1
>
>New game
>Shootout (Shredder62, Blitz:10')
>
>1.Qxe7+ Ka2 2.Qe6+ Kb1 3.Qe1+ Ka2 4.Qe6+ Kb1 5.Qe4+ c2 6.f4 Qc3 7.f5 Kc1 8.f6
>Qxf6 9.h4 Qf2+ 10.Kh3 Kd2 11.Qd5+ Ke1 12.Qe4+ Qe2 13.Qc6 Qf1+ 14.Kg4 Qd3 15.Kh3
>Qf5+ 16.Kh2 Ke2 17.Qe8+ Kf1 18.Qc6 Qf2+ 19.Kh3 Kg1 20.Kg4 Qe2+ 21.Kf5 Qf1+
>22.Kg6 c1Q 0-1

Here's how CM9000, on a P3-733, plays it out (both sides with no ponder, 2
minutes per move):

1.Qxe7+ Ka2 2.Qe6+ Kb1 3.Qe1+ Qc1 4.Qe4+ c2 5.h4 Qb2 6.g4 Qc3 7.g5 Kb2
8.Qb7+ Qb3 9.Qg7+ Ka2 10.Qa7+ Kb1 11.Qh7 Qf3 12.Qg6 Qxf2+ 13.Kh3 Qd4
14.Qh7 Kb2 15.Qb7+ Kc3 16.Qc7+ Kd2 17.Qh2+ Kd3 18.Qc7 Qc3 19.Qxc3+ Kxc3
20.Kg4 c1=Q 21.Kh5 Kd4 22.Kg6 Ke5 23.Kh6 Ke6 24.Kg7 Qf4 25.h5 Qxg5+
26.Kf8 Qg4 27.h6 Qg6 28.h7 Qf7# 0-1




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