Author: Dieter Buerssner
Date: 11:15:32 06/11/02
Go up one level in this thread
On June 11, 2002 at 08:21:47, Bernhard Bauer wrote:
>On June 10, 2002 at 23:32:22, K. Burcham wrote:
>
>>Atilla Koranyi, second prize Bron Memorial Tournament 1986.
>>White wins the endgame in 15 moves!!
>>
>>
>>How long does it take your favorite program to find g5?
>>
>> 7k/5K2/5P1p/3p4/6P1/3p4/8/8 w - - 0 1
>
>Yace 99.56 on a P3-450 finds it too!
>
> 143196002 10:57.4 0.00 20t 1.Ke7 d2 2.f7 d1=Q 3.f8=Q+ Kh7 4.Qf7+ Kh8 5.g5
> Qe1+ 6.Kd7 hxg5 7.Qh5+ Kg7 8.Qxg5+ {EGTB} {-80}
> 163212921 12:31.3 0.01 20t+ 1.g5 hxg5 2.Ke7 d2 3.f7 d1=N
> 163368822 12:32.1 0.40 20++ 1.g5 hxg5 2.Ke7 d2 3.f7 d1=R 4.f8=Q+ Kh7
> 163449232 12:32.5 1.40 20++ 1.g5 hxg5 2.Ke7 d2 3.f7 d1=R 4.f8=Q+ Kh7
> 163507174 12:32.9 6.40 20++ 1.g5 hxg5 2.Ke7 Kg8 3.f7+ Kh7
> 197940297 14:22.6 Mat15 20t 1.g5 hxg5 2.Ke7 d2 3.f7 d1=Q 4.f8=Q+ Kh7 5.Qf5+
> Kh6 6.Kf7 Qh5+ 7.Kf6 d4 8.Qe4 d3 9.Qxd3 {EGTB}
> {-80}
> 198009708 14:23.2 Mat15 20. 1.g5 hxg5 2.Ke7 d2 3.f7 d1=Q 4.f8=Q+ Kh7 5.Qf5+
> Kh6 6.Kf7 Qh5+ 7.Kf6 d4 8.Qe4 d3 9.Qxd3 {EGTB}
> {-80}
>Congratulation to YACE!!!
Thanks. I fear Yace without TBs could not find it in reasonable time. I tried
this with my current developement version. First with access to 5-men TBs (I
only have a small set, including KQPKQ). K6-2 475 (which is somewhat slower than
your computer, judging from the nodes/s):
36021734 4:17.2 0.00 20t 1. Ke8 d2 2. f7 d1=Q 3. f8=Q+ Kh7 4. Qf7+ Kh8
5. Qf8+ {-80}
50815736 6:25.9 0.01 20t+ 1. g5 hxg5 2. Ke7 d2 3. f7 d1=R 4. f8=Q+ Kh7
50894554 6:26.4 0.40 20++ 1. g5 hxg5 2. Ke7 d2 3. f7 d1=R 4. f8=Q+ Kh7
50949756 6:26.8 1.40 20++ 1. g5 hxg5 2. Ke7 d2 3. f7 d1=R 4. f8=Q+ Kh7
53486521 6:41.5 6.40 20++ 1. g5 hxg5 2. Ke7 d2 3. f7 d1=R 4. f8=Q+ Kh7 5.
Qf5+ Kh8
121278955 12:03.8 Mat15 20t 1. g5 hxg5 2. Ke7 d2 3. f7 d1=Q 4. f8=Q+ Kh7 5.
Qf5+ Kh6 6. Kf7 Qh5+ 7. Kf6 d4 8. Qe4 d3 9.
Qxd3 {EGTB} 9...Qe8! 10. Qh3+!! Qh5 11. Qf5!!
g4! 12. Qf4+!! Kh7! 13. Qc7+! Qf7+! 14. Qxf7+!
Kh8 15. Qg7#! {921}
121411479 12:05.8 Mat15 20. 1. g5 hxg5 2. Ke7 d2 3. f7 d1=Q 4. f8=Q+ Kh7 5.
Qf5+ Kh6 6. Kf7 Qh5+ 7. Kf6 d4 8. Qe4 d3 9.
Qxd3 {EGTB} 9...Qe8! 10. Qh3+!! Qh5 11. Qf5!!
g4! 12. Qf4+!! Kh7! 13. Qc7+! Qf7+! 14. Qxf7+!
Kh8 15. Qg7#! {921}
BTW. The strange "fail high lines" with d1=R may come from the fact that KRPKQ
is not available.
Now, without access to the 5-men TBs (4-men info available)
263796631 27:04.6 0.00 22. 1. Ke8 d2 2. f7 d1=Q 3. f8=Q+ Kh7 4. Qf7+ Kh8
5. Qf8+ {-80}
371975328 38:27.5 0.00 23t 1. Ke8 d2 2. f7 d1=Q 3. f8=Q+ Kh7 4. Qf7+ Kh8
5. Qf8+ {-80}
504848287 51:46.3 0.01 23t+ 1. g5 hxg5 2. Ke7 d2 3. f7 d1=Q 4. f8=Q+ Kh7 5.
Qf5+ Kh6 6. Kf7 Qh5+ 7. Kf6H d4H {HT}
506037089 51:53.0 0.40 23++ 1. g5 hxg5 2. Ke7 d2 3. f7 d1=Q 4. f8=Q+ Kh7 5.
Qf5+ Kh6 6. Kf7 Qh5+ 7. Kf6 d4
506419892 51:55.1 1.40 23++ 1. g5 hxg5 2. Ke7 d2 3. f7 d1=Q 4. f8=Q+ Kh7 5.
Qf5+ Kh6 6. Kf7 Qh5+ 7. Kf6 d4
526772274 53:44.2 6.40 23++ 1. g5 hxg5 2. Ke7 d2 3. f7 d1=Q 4. f8=Q+ Kh7 5.
Qf5+ Kh6 6. Kf7 Qh5+ 7. Kf6 d4
845165857 1:15:22 Mat15 23t 1. g5 hxg5 2. Ke7 d2 3. f7 d1=Q 4. f8=Q+ Kh7 5.
Qf5+ Kh6 6. Kf7 Qh5+ 7. Kf6 d4 8. Qe4 d3 9.
Qxd3 Qe8 10. Qh3+ Qh5 11. Qf5 g4 12. Qf4+ Kh7
13. Qc7+ Qf7+ 14. Qxf7+ Kh6 15. Qg6# {921}
845773943 1:15:25 Mat15 23. 1. g5 hxg5 2. Ke7 d2 3. f7 d1=Q 4. f8=Q+ Kh7 5.
Qf5+ Kh6 6. Kf7 Qh5+ 7. Kf6 d4 8. Qe4 d3 9.
Qxd3 Qe8 10. Qh3+ Qh5 11. Qf5 g4 12. Qf4+ Kh7
13. Qc7+ Qf7+ 14. Qxf7+ Kh6 15. Qg6# {921}
I think, you are totally right about the "nullmove killer". The most interesting
position in the line may be:
[D] 8/4K3/7k/3p1Qp1/8/8/8/3q4 w - - 3 6
I guess many nullmove using programs may fail to find Kf7 here, even when you
give them lots of time.
Regards,
Dieter
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