Author: Brian Katz
Date: 17:53:09 12/30/03
Go up one level in this thread
On December 30, 2003 at 20:50:43, Brian Katz wrote: >On December 30, 2003 at 17:28:28, Brian Katz wrote: > >>Black to move and win ?? Yes !! >>>> >>>>[D]8/5p2/1kp5/p1p5/P1PpKPPp/1P5P/8/8 b >>>> >>>>The above position was derived from a real skittles game I had. I was Black and >>>>the King was on g7 and the f-pawn was on f6 as shown below: >>>> >>>>[D]8/6k1/2p2p2/p1p5/P1PpKPPp/1P5P/8/8 b >>>> >>>>White had just blundered with King from d3 to e4 1.Ke4??...From that position >>>>the win for Black is quite easy. White made it very easy for Black with: >>>>1.Ke4 f5+!!2.gf Kf6 3.Kf3 Kxf5 4.Kf2 Kxf4 and Black wins easily. The King cannot >>>>take the f5 pawn because the Black d pawn will promote. If the White King >>>>retreats to f3, ...fxg4+ wins, because ...Kc7 and Black gets to the queening >>>>square in time, and Black's d pawn always threatens to advance. And lastly, if >>>>white's h-pawn takes on g4 then Black will have a passed h4 pawn and a passed d3 >>>>pawn, and the White King cannot stop both. >>>> I was so fascinated with that position, that I wanted to see just how far away >>>>the Black King could be and still secure the win. The position is very >>>>deceiving. It appears at first that the Black King is out of the game and should >>>>lose or at least draw. But winning for Black ?? I showed this position to quite >>>>a few masters, and all did not realize that Black is winning. I even showed this >>>>position to Grandmaster Lev Alburt at the US Amateur Team East, 2 years ago, and >>>>he did not realize it either. Nor did GM Arthur Bisguier. >>>> >>>>The same motifs apply to the first position above. See how your programs >>>>evaluate this position. Some find it easily and some take much longer. >>>>The winning line results in both sides Queening. That is the analysis of Fritz8. >>>>Actually, Fritz 8 has White Queening first, but Black Queen' immediately after >>>>that with extra pawns that win. >>>>Enjoy >>>>Brian >>>>Happy New Year !! > >Below is a slight twist. All the pieces are moved back one rank towards the >white position, and the Black King is moved one file to the left as well. The >position being further back allows the one file farther away Black King enough >time to get to the queening square. >You can experiment with this by adding more Black pawns to the c-file to make it >even more deceiving to the Human Eye. Sorry. Now the diagram is included. > >[D]8/8/8/k1p2p2/p1p5/P1PpKPPp/1P5P/8 b >Brian
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.