Author: Miguel A. Ballicora
Date: 15:47:21 07/24/02
Go up one level in this thread
On July 24, 2002 at 17:56:04, Nolan Denson wrote:
>Ok i was trying to read up on extension and ran across this conversation. So
>what I am wondering how much have we improved with todays programs and faster
>computers ... ( This post will be the first time that i see this position) it
>may be a test problem now.
>
>>Posted by Howard Exner on January 09, 1998 at 21:03:51:
>
>[D]r3rk2/ppq2pbQ/2p1b1p1/4p1B1/2P3P1/3P1B2/P3PPK1/1R5R w - - id"Seiriwan -
>>>Sokolov,A" bm Qxg7+;
>
>>I am always interested in the problems that program X finds quickly
>>while program Y struggles. It makes me curious as to what makes them
>>tick. Rebel 8 for example finds WAC 141 rather quickly but has a very
>>hard time finding this above mate in 7. I think it is the quiet move,
>>Bf6 that is the stumbling block for Rebel.
>
>I checked with Rebel9. Rebel9 needs 22:00 and 11 plies.
>
>The "killer" here is not 3.Bf6 but 6.Rh1
>
>The main variation found:
>
>1.Qxg7 Kxg7 2.Rh7+ Kxh7 3.Bf6 g5 4.Be4+ Bf5 5.Bxf5+ Kg8 6.Rh1 and
>mate on the next move.
>
>I am currently working on a better tactical version. It finds 1.Qxg7
>in 3:28 on ply 9 but the version in question is 25-30% slower in normal
>positional play.
>
>As always the big question remains if "improved" tactics will result
>in an overall improvement.
>
>For the moment I have baptized this version as Rebel Turtle and I hope
>auto232 will tell me more.
>
>I receive a lot of input from customers. Sometimes they tell you
>something you will not forget your whole life. One of them once said:
>
>"You guys release new versions and every new version only does
>better on points where it was already good"
>
>While I believe this is not the entire truth the man has a point :))
Gaviota 0.32 finds it in one minute in a pIII 800mhz.
Miguel
setboard r3rk2/ppq2pbQ/2p1b1p1/4p1B1/2P3P1/3P1B2/P3PPK1/1R5R w - -
d
+-----------------+
| r . . . r k . . |
| p p q . . p b Q |
| . . p . b . p . |
| . . . . p . B . |
| . . P . . . P . |
| . . . P . B . . |
| P . . . P P K . |
| . R . . . . . R |
+-----------------+
analyze
188924 7 1.5 +0.91 Bg5-h6 Bg7xh6 Qh7xh6 Kf8-e7
Kg2-g1 Ke7-d8 Qh6-h4 Kd8-c8
Bf3-g2
670321 7: 5.8 +0.91 Bg5-h6 Bg7xh6 Qh7xh6 Kf8-e7
Kg2-g1 Ke7-d8 Qh6-h4 Kd8-c8
Bf3-g2
751759 8 6.6 +1.10 Bg5-h6 Bg7xh6 Qh7xh6 Kf8-e7
Kg2-g1 Ke7-d8 Qh6-c1 Kd8-c8
Rh1-h7
1211242 8 11.2 +1.25 Bg5-e3 f7-f6 Qh7xg6 b7-b6
Kg2-g1 Re8-e7 Qg6-h7 Ra8-d8
1789079 8: 16.7 +1.25 Bg5-e3 f7-f6 Qh7xg6 b7-b6
Kg2-g1 Re8-e7 Qg6-h7 Ra8-d8
4285857 9 41.9 :-( Bg5-e3
6110031 9 55.9 :-) Qh7-h8
6158907 9 56.3 :-) Qh7-h8
6223385 9 56.9 :-) Qh7-h8
6248990 9 57.1 :-) Qh7-h8
6508846 9 59.6 +Mat_8 Qh7-h8 Bg7xh8 Rh1xh8 Kf8-g7
Rh8-h7 Kg7xh7 Bg5-f6 Be6xg4
Bf3xg4 g6-g5 Bg4-f5 Kh7-g8
Rb1-h1 Re8-e7 Rh1-h8
6624683 9 60.7 +Mat_7 Qh7xg7 Kf8xg7 Rh1-h7 Kg7xh7
<-transp
7189207 9: 66.6 +Mat_7 Qh7xg7 Kf8xg7 Rh1-h7 Kg7xh7
<-transp
7850798 10 72.9 +Mat_7 Qh7xg7 Kf8xg7 Rh1-h7 Kg7xh7
Bg5-f6 Be6xg4 Bf3xg4 g6-g5
Bg4-f5 Kh7-g8 Rb1-h1 Re8-e7
Rh1-h8
14819804 10: 138.9 +Mat_7 Qh7xg7 Kf8xg7 Rh1-h7 Kg7xh7
Bg5-f6 Be6xg4 Bf3xg4 g6-g5
Bg4-f5 Kh7-g8 Rb1-h1 Re8-e7
Rh1-h8
17647162 11 165.7 +Mat_7 Qh7xg7 Kf8xg7 Rh1-h7 Kg7xh7
Bg5-f6 Be6xg4 Bf3xg4 g6-g5
Bg4-f5 Kh7-g8 Rb1-h1 Re8-e7
Rh1-h8
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