Author: Paul Byrne
Date: 00:18:23 05/07/01
Go up one level in this thread
On May 06, 2001 at 11:55:05, Paul wrote: >On May 06, 2001 at 10:13:27, leonid wrote: > >>On May 06, 2001 at 06:22:26, leonid wrote: >> >>>Hello! >>> >>>If you would like to solve a mate, you can try this moderate position: >>> >>>[D]Qqrkrq1Q/1QqqqqQ1/qBbnnbBq/1NQ2QN1/8/2Q2Q2/3RR3/3K4 w - - >>> >>>Please indicate your result. > >Ok ... my guess, before Heiner moves in with his heavy artillary, a mate in 9: > >06:18 WM9 09 Bxc7+ Qbxc7 Qxc7+ Qxc7 Qxd6+ Qcxd6 Nxe6+ Qexe6 Qfxf6+ Re7 Rxd6+ >Qxd6+ Qxd6+ Bd7 Qhxf8+ Qxf8 Qcc7# > G2K's PN search says: 1W. i=8094 n=324622 p=0 d=1000000000 t=3.620 1W. Qxc7 wins! 3.62 seconds, 324633 nodes. This is the kind of mate PN does well in, although it doesn't get you a mate-in-n number. >>>Thanks, >>>Leonid. >> >>After sending this last position I went to see its branching factor on one >>professional program. I took it recently from the Web. After thinking for a >>while program stopped breathing. Sudden death. Then I felt me a little bit >>guilty by presenting upper position for Sunday. Better will be the next one that >>is really. I did it yesterday before comming to the position that is above. > >No ... it wasn't too hard, Leonid! You must really be a nice guy, thinking about >our feelings like that, thanks! ;) > >>[D]nqrkrqn1/1QqnnqQ1/1BnbbnB1/BQNNNNQB/8/8/3RR3/3KQ3 w - - >> >>Please indicate your result. >> >>Thanks, >>Leonid. > >This one's a bit too easy, haha, found a mate in 6: > >00:04 WM6 06 Qxc7+ Nxc7 Nxd6 Nxa5 Qxd7+ Nxd7 Nc6+ Nxc6 Ncb7+ Qxb7 Nxb7# > >Have a nice Sunday, >Paul And on this one, 1W. i=255976 n=8485323 p=0 d=1000000000 t=76.740 1W. Bxc7 wins! Which is interesting. I think the first one was the easy one. :) The non-checking move in there gives PN search a tough time. Thanks for the interesting problems... -paul [the other one :)] By the way, the second one is also a win in ICC's wild 17. Forgot to switch variants on my first attempt...
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