Author: m.d.hurd
Date: 10:41:29 01/12/00
Go up one level in this thread
On January 12, 2000 at 12:09:08, John Merlino wrote: >On January 11, 2000 at 22:15:50, Imran Hendley wrote: > >>On January 11, 2000 at 20:06:00, John Merlino wrote: >> >>>On January 11, 2000 at 03:11:42, m.d.hurd wrote: >>> >>>>On January 11, 2000 at 03:07:19, m.d.hurd wrote: >>>>Correction : >>>> >>>>Fritz 6 solves this in seconds and keeps announcing the mate up to where it >>>>promotes to a knight then draws by three fold repitition. >>>> >>>> >>>>Start position >>>> >>>>[D] 8/8/8/2p5/1pp5/brpp4/1pprp2P/qnkbK3 w - - 0 1 >>>> >>>>Regards >>>> >>>>Mike >>> >>>Chessmaster falls into the same trap as Fritz (et. al.). It announced mate in 15 >>>in 8 seconds (on a PII-450), and proceeded to promote to a queen for a 3-fold >>>draw. >>> >>>But, if I take it past the knight promotion, it DOES work out the mate in 9 from >>>there. >>> >>>jm >> >>I don't see the logic behind this. When it announces mate does it see the knight >>promotion? If so why does it promote to a Queen? And if when it announces mate >>it sees a Queen promotion, how can this be, because there is obviously no mate >>with a Queen. Do you know why this happens? > >I have no idea why it happens. It does appear to defy logic. But there must be >SOME programmatic reason for it, since Fritz appears to do its own version of >the same thing (announce mate, promote to knight, draw by 3-fold). > >jm And not just Fritz 6, if you take the position after the pawn has promoted to a Knight, neither Fritz 6 or 5.32 or Hiarcs 7.32 or Crafty 17.4 find the mate. Doctor 3 does and also comet b10. So some solve it and some do not, maybe someone else knows the answer why it should be so difficult. Mike
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