Author: Simon Finn
Date: 02:31:08 10/05/01
Go up one level in this thread
On October 04, 2001 at 14:26:17, Dieter Buerssner wrote:
>On October 04, 2001 at 09:59:03, Simon Finn wrote:
>
>>On October 04, 2001 at 02:16:42, Ed Schröder wrote:
>>
>>>On October 03, 2001 at 19:49:56, Slater Wold wrote:
>>>
>>>>On October 03, 2001 at 15:45:32, José Antônio Fabiano Mendes wrote:
>>>>
>>>>> Taimanov-Zakharov,USSR 1969 === Black to move and win
>>>>> [D]8/5p2/7p/5pk1/8/5KPP/8/8 b
>>>>> Source: http://chesscafe.com/text/secpawnendings.txt
>>>>
>>
>>[snip]
>
>>1...h5! is definitely best.
>>
>>Karsten & Mueller's 1...Kg6 2. Ke3 Kg7 is less convincing, since
>>
>>3. Kf3! h5 (3... Kh7 4. Kf4 Kg6 5. Ke3 etc) 4. Ke3 Kh6 5. Kf3 Kg5 6 h4+
>>
>>is just a long-winded way to reach the main line after 1...h5!
>>
>>Instead, after 1...Kf6 2. Kf4 Ke6 3. Ke3 Ke5 4. Kf3
>>
>>[D]8/5p2/7p/4kp2/8/5KPP/8/8 b
>>
>>we get an even harder (6 ply deeper) test position.
>>
>>Black can win only by retracing his steps:
>>
>>4...Kf6 5. Kf4 Kg6 6. Ke3 Kg5 7. Kf3 h5! etc
>
>What happens after 6. g4 ? I can only get a drawscore within 5 minutes.
>(You can add 3 to the move numbers).
>
> 26601121 4:51.9 0.00 26t 3.g4 f6 4.Kf3 h5 5.gxh5+ Kg7 6.Kg2 f4 7.h6+
> Kxh6 {EGTB} 8.h4 f3+ 9.Kh2 f2 10.Kg2! {Not all
> positions found in TB} {-80}
Yace is right. I wish I had the KPPKP EGTB in my head!
>
>>The score is convincing but the PV isn't. What causes the repetition?
>
>For the later position, Yace failed high for h5 with mate score, but I lost
>patience, after the fail high was not resolved after 1/2 hour.
>After doing few moves into the line, and going back, I get this - I hope with
>convincing score and PV :-)
>
>
> 176 2.998 Mat30 22. 1...h5 2.Ke3 f4+ 3.gxf4+ Kd5 4.Kd3 f6 5.Ke3 h4
> 6.Kf3 f5 7.Ke3 Kc4 8.Ke2 Kd4 9.Kf3 Kd3 10.Kg2
> Ke4 11.Kf1 Kxf4 {EGTB} 12.Kf2! Ke4! 13.Ke2! f4!
> 14.Kf2! f3! 15.Kf1! Ke5 16.Kg1 Kf5! 17.Kf1!
> Ke4! 18.Kf2! Kf4! 19.Kf1! Kg3! 20.Kg1 Kxh3!
> 21.Kf2! Kg4! 22.Kf1! h3 23.Kg1! Kf4! 24.Kf1 h2
> 25.Kf2 Ke4! 26.Ke1! f2+! 27.Kf1 h1=Q+! 28.Kxf2!
> Qh2+! 29.Kf1 Ke3 30.Ke1 Qe2# {1001}
Very impressive. (I eventually spotted this line when I realised that
I had confused the position with the pawns blocked on h3/h4 with the
similar position with the pawns blocked on h2/h3.)
So is 1...Kf6 (mate in 33?) better than 1...h5 in the original position?
>
>Regards,
>Dieter
I can see that all the good things that people have been saying about Yace and
pawn endgames must be true. Thanks for putting me right on this one!
Simon
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