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Subject: Mate in 19?

Author: Paul Byrne

Date: 01:18:30 03/03/04

Granted, it is not a terribly useful position, as it came from a wild 8 (pawns
start on 4th rank) game on ICC between 2 patzers.  And a very short search will
get you a score of +10 to +15 and better in white's favor.

It is, however, surprisingly tough to see the mate, and makes an interesting
test position...

[D]r1b3n1/6k1/1n6/pP3qPQ/2PP2p1/1p4b1/4B3/R1BK2NR w - - 0 15

Guildenstern's normal search cannot see it here, while it's PN search gets it in
under 30 seconds on an athlon 2400+.  The line the PN search produces is mate in
19, but is likely not optimal, as PN search is not terribly concerned with
winning in the least number of moves.

So, what programs can see the win from here?

-paul

Re: Mate in 19? Steve Maughan 06:41:47 03/03/04
Re: Mate in 19? Michael Diosi 03:43:02 03/03/04
- Re: Mate in 19? F. Huber 04:30:28 03/03/04
Re: Mate in x? Sune Fischer 03:04:29 03/03/04
- Re: Mate in x? Tord Romstad 06:41:26 03/04/04
  - Re: Mate in x? Sune Fischer 09:55:11 03/04/04
    - Re: Mate in x? Uri Blass 10:06:47 03/04/04
- Re: Mate in x? Dann Corbit 12:30:53 03/03/04
  - Re: Mate in x? Sune Fischer 12:57:39 03/03/04
    - Re: Mate in x? [long computer analysis by several engines] Dann Corbit 13:52:17 03/03/04
      - Re: Mate in x? [long computer analysis by several engines] Sune Fischer 14:41:14 03/03/04
        
        Re: Mate in x? [long computer analysis by several engines] Dann Corbit 14:46:47 03/03/04
      - Re: Mate in x? [long computer analysis by many engines -- finally Yace] Dann Corbit 14:00:23 03/03/04
Re: Mate in 19? George Tsavdaris 02:17:59 03/03/04
- Re: Mate in 19? Mate in 15- CM9k SKR Vincent Lejeune 12:27:36 03/03/04
- Re: Mate in 19? Jouni Uski 02:20:30 03/03/04

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