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Subject: Re: Fischer - Panno, 1970 [it's not a good test position]

Author: Kurt Utzinger

Date: 23:45:16 12/26/02

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On December 26, 2002 at 19:53:10, Mike S. wrote:

>On December 26, 2002 at 19:34:25, Mike Byrne wrote:
>
>>28. Be4!  a super grandmaster move, by a super grandmaster.
>>
>>Any programs come up with this?
>>[d]2nq1nk1/5p1p/4p1pQ/pb1pP1NP/1p1P2P1/1P4N1/P4PB1/6K1 w - -
>
>It looks like White can insert the zwischenzug 28.hxg6, whereafter Black has to
>defend against the simple threat gxh7+ Kh8 (Nxh7 doesn't make much sense either)
>Nxf7 mate, first. IOW it looks to me as if Be4 doesn't have to be played
>immediatly (I didn't analyse much).
>
>It's often a problem with test positions when the attacker can play a simple but
>strong threat alternatively (and delay the intended solution, so you don't know
>if the program has missed it or is just going to play it later...).
>
>Analysis by Fritz 7 (P3/700, 96 MB hash):
>
>1.hxg6 fxg6 2.Nxh7 Nxh7 3.Qxg6+ Kh8 4.Qxe6 Bd7 5.Qxd5 Ng5 6.Nf5 Ne6
>  ²  (0.63)   Depth: 8/27   00:00:00  301kN
>  ±  (0.91)   Depth: 12/35   00:00:23  7799kN
>1.Be4 Be8 2.hxg6 hxg6 3.Nh5 gxh5 4.Bh7+ Nxh7 5.Nxh7 f5 6.Nf6+ Kf7 7.Nxh5 Ke7
>8.Qg7+
>  ±  (0.94)   Depth: 12/35   00:00:38  12492kN
>  ±  (1.09)   Depth: 13/36   00:01:09  23280kN
>
>Regards,
>M.Scheidl

Hi Mike
I fully agree. This test position is not a good one because at least three moves
are easily winning here, namely 1.Be4, 1.hxg6 and 1.Nxh7

Below the analysis of Shredder7 ond P4 1.8/32 MB hash:

New game
2nq1nk1/5p1p/4p1pQ/pb1pP1NP/1p1P2P1/1P4N1/P4PB1/6K1 w - - 0 1

Analysis by Shredder 7:

1.hxg6 hxg6 2.Qh8+ Kxh8 3.Nxf7+ Kg8 4.Nxd8 g5 5.Nb7 a4 6.bxa4 Bc4 7.Nd6 Nxd6
8.exd6 Bxa2
  +-  (1.44)   Depth: 1/7   00:00:00
  +-  (2.21)   Depth: 10/26   00:00:01  525kN
1.Nxh7 Nxh7 2.hxg6 fxg6 3.Qxg6+ Kh8 4.Qxe6 Ne7 5.Nf5 Nxf5 6.gxf5 Qc7 7.Qh6
  +-  (2.22)   Depth: 10/26   00:00:02  631kN
  +-  (2.29)   Depth: 15/41   00:01:57  31632kN
1.Be4 Be8 2.hxg6 hxg6 3.Nh5 gxh5 4.Bh7+ Nxh7 5.Nxh7 f5 6.exf6 Qc7 7.f7+ Kh8
  +-  (2.30)   Depth: 15/42   00:03:52  60969kN
  +-  (2.30)   Depth: 15/42   00:03:52  60969kN

(Utzinger, MyTown 27.12.2002)

• Re: Fischer - Panno, 1970 [it's not a good test position] Mike Byrne 09:18:13 12/27/02
  • Re: Fischer - Panno, 1970 [it's not a good test position] Dave Gomboc 15:40:51 12/27/02
    • Re: Fischer - Panno, 1970 [it's not a good test position] Mike Byrne 18:09:16 12/27/02
      • Re: Fischer - Panno, 1970 [it's not a good test position] Dave Gomboc 03:10:15 12/28/02
        • Re: Fischer - Panno, 1970 [it's not a good test position] Mike Byrne 18:48:40 12/28/02
        • Re: Fischer - Panno, 1970 [it's not a good test position] Mike Byrne 09:55:30 12/28/02
  • Re: Fischer - Panno, 1970 [it's not a good test position] Kurt Utzinger 11:12:27 12/27/02

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