Author: Robert Hyatt
Date: 07:18:18 03/10/01
Go up one level in this thread
On March 10, 2001 at 09:51:28, Sune Larsson wrote: > > [D]8/6p1/8/1pK2P2/p4k2/5P2/3P3P/8 w - - 0 1 > > Sumbatjan,K 1995 > > Clean cut pawn ending with 4 vs 3 pawns. But the white ones are > terribly loose. This position shows how tricky these endings > can be. It's white to move for a win. > > > Test: White wins. Don't know if the programs can make this one > but it sure is possible. Solution further down. > > > Sune > > > This might be another one of those "winning without knowing" positions. Crafty finds f6 after a second on my quad. After 5 seconds if fails high and wins a pawn (eval is still in black's favor). After a minute it fails high again, wins another pawn, eval still in black's favor. I didn't run much longer as someone started playing on ICC and I had to stop or kill crafty's performance since I was on the same machine. On my notebook, it also finds f6 almost instantly and seems to know what to do without knowing it is winning... > > > > >Sumbatjan,K >1995 > >1.f6 gxf6 [1...a3 2.f7 a2 3.f8Q+] 2.Kb4 a3 3.Kb3 [3.Kxa3? Kxf3 4.d4 Ke4 5.h4 >Kxd4 6.h5 Kc3 7.Ka2 Kc2 8.Ka3 Kc3 9.h6 b4+ 10.Ka2 Kc2] 3...Kxf3 4.d4 [4.h4? Kg4] >4...Ke4 5.h4 Kd3 [5...f5 6.h5 f4 7.h6 f3 8.h7 f2 9.h8Q f1Q 10.Qe5+ Kd3 11.Qxb5+] >6.h5 [6.d5? a2 7.Kxa2 Kc2] 6...a2 7.Kxa2 Kc2 8.h6 b4 9.h7 b3+ 10.Ka3 b2 11.h8Q >b1Q 12.Qh7+ 1-0
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