Author: Peter Berger
Date: 01:33:47 09/07/01
Go up one level in this thread
On September 06, 2001 at 17:07:59, Dieter Buerssner wrote:
>On September 06, 2001 at 14:36:18, Peter Berger wrote:
>
>>5n2/B3K3/2p2Np1/4k3/7P/3bN1P1/2Prn1P1/1q6 w - - 0 1
>>
>>It is supposed to be a mate in 30 (source unknown to me).
>>
>>Bringer (http://www.reubold.onlinehome.de) announces a mate in 29 after about
>>one minute :
>>
>>0:00:33.6 (11/59) 13872159 5.61 e3-g4 e5-f5 g4-h6 f5-e5 h6-f7 e5-f5
>>f7-d6 f5-e5 f6-g4 e5-d5 c2-c4
>>0:01:16.8 (12/59) 32704069 Matt in 29 e3-g4 (Mat=-1320,50=1)
>>0:01:45.0 (12/59) 49458897 Matt in 29 e3-g4 e5-f5 (Mat=-1320,50=2)
>>
>>What do others think ?
>
>Well, Yace cannot compete here. With some help, it finds a mate in 30 (after 4
>moves, it could see the mate). Here is the line:
>
> 12241895 43.425 Mat30 10. 1.Neg4+ Kf5 2.Nh6+ Ke5 3.Nf7+ Kf5 4.Nd6+ Ke5
> 5.Ng4+ Kd5 6.Ne3+ Ke5 7.Nf7+ Ke4 8.Ng5+ Ke5
> 9.Nf3+ Ke4 10.Nxd2+ Ke5 11.Nf3+ Ke4 12.Ng5+ Ke5
> 13.Nf7+ Ke4 14.Nd6+ Ke5 15.Ng4+ Kd5 16.Nf6+ Ke5
> 17.Nf7+ Kf5 18.Nh6+ Ke5 19.Nhg4+ Kf5 20.Ne3+
> Ke5 21.Nfg4+ Ke4 22.Nf2+ Ke5 23.Nxd3+ Ke4
> 24.Nf2+ Ke5 25.Nfg4+ Ke4 26.Nf6+ Ke5 27.Nc4+
> Kf5 28.Nd6+ Ke5 29.Ng4+ Kd5 30.c4# {-491}
>
>I think, a program that aggressively extends all forced moves could be fast
>finding this.
>
>Can you get a longer PV with Bringer? For example by doing the suggested moves
>on the board.
>
>Regards,
>Dieter
It seems exact mate announcements with more than 16 moves can't be taken too
seriously in the current version.
Bringer's analysis confirms the mate in 30.
Probably it should better announce "Mate soon" ( there is some program that does
that, don't remember which one .. ) - the solution time is excellent though.
Also I wonder about the mate announcement of Angrim's solver (maybe he counts
like Tiger).
5n2/B3K3/2p2Np1/4k3/7P/3bN1P1/2Prn1P1/1q6 w - - 0 1
0:01:17.3 (12/59) 32704069 Matt in 29 e3-g4 (Mat=-1320,50=1)
1. Neg4+ Kf5
0:00:00.1 ( 8/53) 18268 Matt in 29 g4-h6 (Mat=-1320,50=3)
0:00:00.2 ( 8/55) 87183 Matt in 29 g4-h6 f5-e5 (Mat=-1320,50=4)
2. Nh6+ Ke5
0:00:00.0 ( 8/45) 9693 Matt in 29 h6-f7 (Mat=-1320,50=5)
0:00:00.1 ( 8/51) 61633 Matt in 29 h6-f7 e5-f5 (Mat=-1320,50=6)
3. Nf7+ Kf5
0:00:00.1 ( 8/52) 14048 Matt in 28 f7-d6 (Mat=-1320,50=7)
0:00:00.2 ( 8/53) 126088 Matt in 29 f7-d6 f5-e5 (Mat=-1320,50=8)
4. Nd6+ Ke5
0:00:00.0 ( 7/49) 35361 Matt in 29 f6-g4 e5-d5 (Mat=-1320,50=10)
5. Ng4+ Kd5
0:00:00.0 ( 5/29) 1597 Matt in 28 g4-e3 (Mat=-1320,50=11)
6. Ne3+ Ke5
0:00:00.0 ( 3/20) 433 Matt in 29 d6-f7 e5-e4 (Mat=-1320,50=14)
7. Nf7+ Ke4
0:00:00.0 ( 2/10) 137 Matt in 28 f7-g5 (Mat=-1320,50=15)
8. Ng5+ Ke5
0:00:00.0 ( 1/ 3) 35 Matt in 28 g5-f3 (Mat=-1320,50=17)
9. Nf3+ Ke4
0:00:00.0 ( 2/ 7) 230 Matt in 28 f3xd2 (Mat=-800,50=0)
10. Nxd2+ Ke5
0:00:00.0 ( 3/16) 726 Matt in 28 d2-f3 (Mat=-800,50=2)
11. Nf3+ Ke4
0:00:00.0 ( 1/ 4) 55 Matt in 28 f3-g5 (Mat=-800,50=4)
12. Ng5+ Ke5
0:00:00.0 ( 2/ 6) 189 Matt in 28 g5-f7 (Mat=-800,50=6)
13. Nf7+ Ke4
0:00:00.1 ( 5/25) 3625 Matt in 29 f7-d6 e4-e5 (Mat=-800,50=9)
14. Nd6+ Ke5
0:00:00.1 ( 6/33) 13207 Matt in 16 e3-g4 e5-d5 (Mat=-800,50=11)
15. Ng4+ Kd5
0:00:00.0 ( 6/30) 1953 Matt in 15 g4-f6 (Mat=-800,50=12)
16. Nf6+ Ke5
0:00:00.0 ( 5/27) 8096 0.00 f6-g4 e5-d5 (Mat=-800,50=15)
0:00:00.1 ( 5/28) 22651 Matt in 14 d6-f7 (Mat=-800,50=14)
17. Nf7+ Kf5
0:00:00.0 ( 5/26) 6717 Matt in 13 f7-h6 (Mat=-800,50=16)
18. Nh6+ Ke5
0:00:00.0 ( 5/24) 2798 Matt in 12 h6-g4 e5-f5 (Mat=-800,50=19)
19. Nhg4+ Kf5
0:00:00.0 ( 4/22) 668 Matt in 11 g4-e3 (Mat=-800,50=20)
20. Ne3+ Ke5
0:00:00.0 ( 4/21) 3600 Matt in 10 f6-g4 (Mat=-800,50=22)
21. Nfg4+ Ke4
0:00:00.0 ( 4/18) 871 Matt in 9 g4-f2 (Mat=-800,50=24)
22. Nf2+ Ke5
0:00:00.0 ( 4/16) 741 Matt in 8 f2xd3 (Mat=-460,50=0)
23. Nxd3+ Ke4
0:00:00.0 ( 4/14) 1075 Matt in 7 d3-f2 e4-e5 (Mat=-460,50=3)
24. Nf2+ Ke5
0:00:00.0 ( 4/12) 859 Matt in 6 f2-g4 e5-e4 (Mat=-460,50=5)
25. Nfg4+ Ke4
0:00:00.0 ( 3/10) 279 Matt in 5 g4-f6 e4-e5 (Mat=-460,50=7)
26. Nf6+ Ke5
0:00:00.0 ( 3/ 9) 236 Matt in 4 e3-c4 (Mat=-460,50=8)
27. Nc4+ Kf5
0:00:00.0 ( 2/ 6) 94 Matt in 3 c4-d6 f5-e5 (Mat=-460,50=11)
28. Nd6+ Ke5
0:00:00.0 ( 2/ 7) 124 Matt in 2 f6-g4 (Mat=-460,50=12)
29. Ng4+ Kd5
0:00:00.0 ( 1/ 4) 18 Matt in 1 c2-c4 (Mat=-460,50=0)
30. c4++
Bringer has an excellent memory, too :-) . Now I get from the starting position
0:00:00.1 ( 1/ 4) 24 Matt in 29 e3-g4 e5-f5 (Mat=-1320,50=2)
Regards,
pete
PS : What I really disliked it the behaviour at move 17 - I will send this to
Gerrit anyway..
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