Author: Sune Larsson
Date: 00:31:16 03/03/01
Go up one level in this thread
On March 02, 2001 at 20:39:16, Dieter Buerssner wrote:
>On March 02, 2001 at 18:11:42, Sune Larsson wrote:
>
>>On March 02, 2001 at 17:51:12, Dieter Buerssner wrote:
>>
>>>On March 02, 2001 at 14:39:10, Sune Larsson wrote:
>>>
>>>> 1k3b1q/pP2p1p1/P1K1P1Pp/7P/2B5/8/8/8 w - - 0 1
>>> 15398034 1:43.3 1.73 19. 1.Kd5 Kc7 2.Bb5 Qg8 3.Be8 Kb8 4.Bf7 Qh8 5.Kc6
>>> Qg8 6.Kd7 Qh8 7.Kd8 Qg8 8.Ke8 Qh8 9.Kd7 Qg8
>>> 10.Bxg8 {80}
>
>>1.Kd5 Qg8 2.Bb5 Kc7 3.Be8 Qh8 4.Bf7 Kb8 5.Kc6 Qg8 6.Kd7 Qh8 7.Ke8 Kc7 8.b8Q+
>>Kxb8 9.Kd8 Ka8 10.Kc8 Qg8 11.Kc7 Qxf7 12.gxf7 g5 13.Kd8 g4 14.Ke8 Bg7 15.Kxe7 g3
>>16.f8Q+ Bxf8+ 17.Kxf8 g2 18.e7 g1Q 19.e8Q# 1-0 Puh...;)
>
>It looks, as if the first 12 plies of Yace are not too bad.
>
>But - is your line correct? It is late at night here - so I might seem stupid.
>However, following your line until 18.e7, I cannot see a mate in one after
>18...Kb8
You are very far from looking stupid, Dieter. I see it this way:
1)It's a study where white moves to win. The trick is to unlock
the position by forcing black to end the repetitions.
2)After 11.Kc7 it's fulfilled. Black has to take on f7 because
of the threat Be8, Bc6 mate.
3)After 15.Kxe7 it's finished and totally clear that white wins
in several ways. Guess the source (the author?) chose to show the
first given line (ending with 18.-g1Q and e8Q mate) for aesthetical
reasons. It's a clean, running end with two queens on the board
where black has promoted first. Not the fastest way though, as
noticed by you and Yace. And the analysis of Yace is of course correct...
Sune
>
> 26 0.868 -Mat11 16. 18...Kb8 19.e8=Q+ Kc7 20.Qg6 Kd7 21.Kf7 g1=Q
> 22.Qxg1 Kc6 23.Qd4 Kb5 24.Ke7 Kxa6 25.Qb2 Ka5
> 26.Kd6 Ka4 27.Kc5 a6 28.Qb4# {-921}
>
>OTOH, slightly earlier in your line, Yace sees
>
> 496 1.891 Mat05 62. 16.Kd6 Kb8 17.e7 Be5+ 18.Kd7 Ka8 19.e8=Q+ Bb8
> 20.Qe4# {651}
>
>instead of 16. f8Q+.
>
>Again, as black's 15th move, Yace suggests:
>
> 33 0.844 -Mat10 17. 15...Kb8 16.Kd7 Bf8 17.e7 Bxe7 18.Kxe7 Kc7
> 19.f8=Q Kc6 20.Ke6 g3 21.Qd6+ Kb5 22.Kd5 g2
> 23.Qc5+ Kxa6 24.Kc6 g1=Q 25.Qb5# {80}
>
>-- Dieter
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