Author: Kurt Utzinger
Date: 04:42:06 10/18/03
Go up one level in this thread
On October 18, 2003 at 07:31:20, George Tsavdaris wrote:
>On October 18, 2003 at 07:19:09, Darren Rushton wrote:
>
>>[D]qn6/rp1p4/pPkP1R2/K7/2P5/B1pP4/2P1P3/8 w - - 0 1
>>
>>Y. G. Vladimirov
>>1st Prize Macleod Memorial Tourney 1994
>>
>>Forced mate in 17!
>>
>>An amusing problem illustrating the use of pendulum manoeuvres and interferences
>>to reposition pieces.
>>
>>White would like to play Rf8 and Rc8 mate, but must avoid giving stalemate. By
>>allowing the king to shuttle between c5 and c6 and checking every second move
>>(otherwise Nc6+ frees the Black forces) White is able to reposition his bishop
>>at g1 and e2 pawn at e5 to allow the rook to reach f8 via a discovered check.
>>
>>The solution is worth close study.
>>1.Bc1 Kc5 2.Be3+ Kc6 3.Bf4 Kc5 4.Rf5+ Kc6 (If 4…Kd4 5.Rd5 mate) 5.Be5 Kc5 6.Bh2+
>>Kc6 (If 6…Kd4 7.Bg1 mate) 7.Rf6 Kc5 8.Bg1+ Kc6 9.e3 Kc5 10.e4+ Kc6 11.Bh2 Kc5
>>12.Rf5+ Kc6 (If 12…Kd4 13.Bg1 mate) 13.e5 Kc5 14.Bg1+ Kc6 15.Rf2 Kc5 16.Rf8+ Kc6
>>17.Rc8 mate.
>>
>>Can a program find it?
>>
>Chessmaster 9000 XXX (a personality of mine), can find the move in 37 seconds
>on a PIV 1500MHz with 32MB hash. I'm sure default CM9000 can find it also very
>quick.
The problem is not to find the correct move but
to find the mate I think.
Kurt
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