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Subject: Behting position

Author: Enrique Irazoqui

Date: 06:46:29 08/30/98

[Event ""Rigasche Rundschau""]
[Site "?"]
[Date "1907.??.??"]
[Round "?"]
[White "Behting"]
[Black "?"]
[Result "1-0"]
[SetUp "1"]
[FEN "8/8/8/5pp1/8/1K6/2pp1Q2/2k5 w - - 0 1"]
[PlyCount "5"]
[EventDate "1907.??.??"]

1. Qe3 f4 2. Qf2 d1=Q (2... f3 3. Qe3) 3. Kc3 f3 4. Qe3+ Kb1 5. Qb6+ Kc1 6. Qb2#
1-0

This is a relatively simple position where white wins in 12 plies or less, but
several programs fail to find Qe3, even after a search deeper than 12 plies.

After at least 5 minutes on a PII-400 with 256 MB RAM, Hiarcs 6, Fritz 5, Mchess
7.1, Nimzo 98, Crafty 15.17, Exchess 2.34 and Junior 4.6 don’t find the
solution. Junior plays instantaneously Kc3?? and announces mate in 4,
overlooking the obvious underpromotion d1N+.

Time to find Qe3 with a winning evaluation:
Genius 5W, 13 secs.
Rebel 9, 30 secs.
Rebel 10, 24 secs.
Shredder 2, 24 secs.

Strange that there is so much difference between programs in this position.

What would Ferret, Dark Thought and others play?

Enrique

Re: Behting position Richard A. Fowell (fowell@netcom.com) 12:39:53 09/04/98
Re: Behting position Dan Newman 11:19:14 09/01/98
Re: Behting position Ernst A. Heinz 02:52:28 09/01/98
Re: Behting position Bernhard Bauer 02:28:48 09/01/98
- Re: Behting position Djordje Vidanovic 12:57:49 09/01/98
  - Re: Behting position Bernhard Bauer 00:06:48 09/03/98
  - Re: Behting position Bruce Moreland 13:21:15 09/02/98
    - Re: Behting position Enrique Irazoqui 06:09:45 09/03/98
      - Re: Behting position Ren Wu 09:37:19 09/03/98
      - Re: Behting position Bruce Moreland 09:05:39 09/03/98
      - Re: Behting position blass uri 07:00:27 09/03/98
        
        Re: Behting position Dave Gomboc 00:57:38 09/05/98
        
        Re: Behting position Bruce Moreland 08:48:48 09/05/98
      - Re: Behting position Ernst A. Heinz 06:21:52 09/03/98
    - Re: Behting position jonathan Baxter 21:55:04 09/02/98
- Re: Behting position blass uri 03:16:01 09/01/98
Re: Behting position Frank Schneider 12:09:05 08/31/98
Re: Behting position James Robertson 15:40:51 08/30/98
- Re: Behting position Enrique Irazoqui 02:02:30 08/31/98
  - Re: Behting position blass uri 02:07:20 08/31/98

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