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Subject: Re: Test Move......About 9 ply for Ruffian...

Author: Uri Blass

Date: 07:11:58 12/08/02

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On December 08, 2002 at 09:50:14, Ulrich Tuerke wrote:

>On December 08, 2002 at 09:36:28, Art Basham wrote:
>
>>Ruffian takes 9 ply to find..
>>R(f1)xf5...!
>
>Comet needs 1o plies (but I guess that seconds are more interesting).
>
>Analysis by Comet B54:
>
>...
>1.g4 hxg5 2.Rxf8+ Qxf8 3.gxf5 exf5 4.Bxg5
>  +-  (1.78)   Depth: 6/26   00:00:00  204kN
>1.g4 hxg5 2.Rxf8+ Qxf8 3.gxf5 exf5 4.Bxg5
>  +-  (1.78)   Depth: 6/26   00:00:00  216kN
>1.Qg6 Rxf7 2.Nxf7 Qf8 3.Nxh6+ Nxh6 4.Rxf8+ Rxf8
>  +-  (2.05)   Depth: 6/26   00:00:00  254kN
>1.Qg6 Nxe3 2.Rxf8+ Qxf8 3.Rxf8+ Kxf8 4.Nxe6+ Ke7
>  +-  (2.58)   Depth: 6/26   00:00:00  274kN
>1.Qg6 Rxf7 2.Nxf7 Qe7 3.g4
>  +-  (2.81)   Depth: 6/29   00:00:00  347kN
>1.Qg6 Rxf7 2.Nxf7 Qe7 3.g4
>  +-  (2.80)   Depth: 7/29   00:00:01  505kN
>1.Qg6 Rxf7 2.Nxf7 Qe7 3.g4
>  +-  (2.53)   Depth: 7/29   00:00:01  793kN
>1.Qg6 Rxf7 2.Nxf7 Qe8 3.d5
>  +-  (2.00)   Depth: 7/29   00:00:02  1149kN
>1.Qg6 Rxf7 2.Nxf7 Qe8 3.Rxf5 exf5 4.Nxh6+ Kh8 5.Nf7+ Kg8
>  +-  (1.52)   Depth: 7/29   00:00:03  1550kN
>1.Qg6 Rxf7 2.Qxf7+ Kh8 3.Qxf5 hxg5 4.Qxg5 Kg8
>  +-  (1.52)   Depth: 8/29   00:00:04  2056kN
>1.Qg6 Rxf7 2.Qxf7+ Kh8 3.Qxf5 hxg5 4.Qg6 Kg8
>  +-  (1.79)   Depth: 8/29   00:00:04  2124kN
>1.Qg6 Rxf7 2.Qxf7+ Kh8 3.Qxf5 exf5 4.Nf7+ Kg8 5.Nxd8 Rxd8 6.d5
>  +-  (1.83)   Depth: 8/29   00:00:04  2246kN
>1.Qg6 Rxf7 2.Qxf7+ Kh8
>  +-  (1.83)   Depth: 9/29   00:00:06  3314kN
>1.Qg6 Rxf7 2.Qxf7+ Kh8
>  +-  (1.83)   Depth: 9/30   00:00:07  3671kN
>1.Qg6 Rxf7 2.Qxf7+ Kh8 3.Qxf5 exf5 4.Nf7+ Kg8 5.Nxd8 Kh8
>  +-  (1.83)   Depth: 10/37   00:00:12  6956kN
>1.Qg6 Rxf7 2.Qxf7+ Kh8 3.Qxf5 exf5 4.Nf7+ Kg8 5.Nxd8 Rxd8 6.d5 Bc8 7.d6
>  +-  (2.10)   Depth: 10/37   00:00:13  8042kN
>1.Qg6 Rxf7 2.Qxf7+ Kh8 3.Qxf5 exf5 4.Nf7+ Kg8 5.Nxd8 Rxd8 6.g3
>  +-  (2.10)   Depth: 10/37   00:00:15  8790kN
>1.R1xf5 exf5 2.Rxg7+ Kxg7 3.Ne6+ Bxe6 4.Bxh6+ Kh8 5.Bg5+ Kg8 6.Bxd8 Rf6
>  +-  (2.63)   Depth: 10/37   00:00:19  11004kN
>1.R1xf5 exf5 2.Rxg7+ Kxg7 3.Ne6+ Bxe6 4.Bxh6+ Kh8 5.Bg5+ Kg8 6.Bxd8 Rf6
>  +-  (3.42)   Depth: 10/37   00:00:22  12660kN
>1.R1xf5 exf5 2.Rxg7+ Kxg7 3.Ne6+ Kh8 4.Nxd8 Raxd8 5.Bxh6 Rg8 6.Bg5+ Kg7
>  +-  (4.47)   Depth: 10/37   00:00:24  13771kN
>1.R1xf5 exf5 2.Rxg7+ Kxg7 3.Ne6+ Bxe6 4.Bxh6+ Kh8 5.Bg5+ Kg7 6.Qh6+ Kg8 7.Qxe6+
>Kg7 8.Bxd8 Raxd8 9.Qxc4
>  +-  (4.73)   Depth: 10/37   00:00:28  16435kN

Ruffian like movei finds Qg6 at depth 13 but later changes it's mind again to
Rf1xf5 at the time of writing these lines ruffian has a fail high for Rxf5 at
depth 15.

It seems that the position is a bad test position.

Uri

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