Author: Uri Blass
Date: 01:28:58 11/26/01
Go up one level in this thread
On November 26, 2001 at 04:11:31, Jouni Uski wrote: >On November 26, 2001 at 03:45:26, Uri Blass wrote: > >>On November 25, 2001 at 20:58:06, Ed Schröder wrote: >> >>>On November 25, 2001 at 17:05:54, Mike S. wrote: >>> >>>>On November 25, 2001 at 15:14:16, Victor Fernandez wrote: >>>> >>>>>(...) >>>> >>>>>Yes, an example: an ending with few pieces . >>>>> >>>>>Kotov-Botvinnik >>>>>[D]8/8/4b1p1/2Bp3p/5P1P/1pK1Pk2/8/8 b - - 0 1 >>>>>The correct move is ...g5 !!! Few programs play this. >>>> >>>>You're right. This position was used as #18 in the BS-2830 computer test suite. >>>>I don't have detailed results available at the moment, but Shep lists #18 as >>>>unsolved on his site: >>> >>>Unsolvable? >>> >>>My latest one needs only 18 seconds. >>> >>>Ed >>> >>>========================================== >>> >>>00:00:04 13.00 0.73 1..Kg3 2.Be7 Bf7 3.Kb2 Be6 4.Kc3 >>> Bf7 5.Kb2 Be6 (3) >>> >>>00:00:10 14.00 0.73 1..Kg3 2.Be7 Bf7 3.Kb2 Kf3 4.Bc5 >>> Kg4 5.Be7 Kf5 6.Bc5 Be6 7.Bd4 Kg4 >>> 8.Bf6 Kf5 9.Bd4 Kg4 10.Bf6 Kf5 (7) >>> >>>00:00:18 14.15 0.73 1..g5 >>>00:00:18 14.15 0.79 1..g5 2.fxg5 Kg3 3.Kxb3 Kxh4 4.Kc3 >>> Kxg5 5.Kd4 Kf5 6.Be7 Bf7 7.Bd6 h4 >>> 8.Be5 (18) >>> >>>00:00:28 15.00 0.82 1..g5 2.fxg5 Kg3 3.Kxb3 Kxh4 4.Kc3 >>> Kxg5 5.Kd4 Kf5 6.Be7 Bg8 7.Bd8 Bf7 >>> 8.Be7 Bg8 9.Bd8 Bf7 10.Be7 (18) >>> >>>00:01:06 16.00 0.89 1..g5 2.fxg5 Kg3 3.Kxb3 Kxh4 4.Kc3 >>> Kg3 5.Kd4 h4 6.Bd6 (35) >> >>I think that the second move of black in the pv is wrong. >> >>I believe that after 1...g5 2.fxg5 Kg3 3.Kxb3 the position is a draw >>The question is how much time does Rebel need to find 2...d4+? >> >>Uri > >I remember analysis,that 1...d4!! is also winning... So this is bad test >position. > >Jouni It only means that the problem has more than one solution but it does not mean that it is a bad test position because finding one of d4+ and g5 is not an easy task Uri
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.