Author: Terry McCracken
Date: 14:25:12 04/19/02
Go up one level in this thread
On April 19, 2002 at 17:20:27, Terry McCracken wrote: >On April 19, 2002 at 16:08:23, John Merlino wrote: > >>On April 19, 2002 at 15:39:39, Terry McCracken wrote: >> >>>On April 19, 2002 at 14:07:13, John Merlino wrote: >>> >>>>This position came up in a game between myself and a friend: >>>> >>>>[D]6k1/5R2/7P/6K1/8/8/p5P1/6r1 w - - 0 1 >>>> >>>>The question is: can White draw (after 1.h7+ Kxf7 2.h8=Q a1=Q)? >>>> >>>>Chessmaster says this, but I suspect that the eval is simply because of the >>>>difference in material (not the steadily dropping score): >>>> >>>>Time Depth Score Positions Moves >>>>0:00 2/3 -2.25 978 1.Ra7 a1=Q 2.h7+ Kh8 3.Rxa1 Rxa1 >>>>0:00 3/4 -2.25 2266 1.Ra7 a1=Q 2.h7+ Kh8 3.Rxa1 Rxa1 >>>>0:00 4/5 -2.63 6103 1.Ra7 a1=Q 2.Rxa1 Rxa1 3.g4 Ra5+ >>>> 4.Kg6 Ra6+ 5.Kg5 >>>>0:00 4/5 -2.60 7857 1.Rg7+ Kh8 2.Ra7 a1=Q 3.Rxa1 Rxa1 >>>> 4.g4 Kh7 >>>>0:00 5/6 -2.60 16712 1.Rg7+ Kh8 2.Ra7 a1=Q 3.Rxa1 Rxa1 >>>> 4.g4 Kh7 >>>>0:00 6/7 -4.04 45865 1.Rg7+ Kh8 2.Ra7 a1=Q 3.Rxa1 Rxa1 >>>> 4.Kg6 Rg1 5.Kf5 Rxg2 >>>>0:01 7/8 -4.66 145818 1.Rg7+ Kh8 2.Ra7 a1=Q 3.Rxa1 Rxa1 >>>> 4.g4 Kh7 5.Kf4 Ra4+ 6.Kf5 Ra5+ >>>> 7.Kf6 Kxh6 >>>>0:02 7/8 -4.01 229288 1.h7+ Kxf7 2.h8=Q a1=Q 3.Qh5+ Kf8 >>>> 4.Qf3+ Ke7 5.Qe4+ Kd6 6.Qg6+ Kc5 >>>> 7.Qf5+ Kc4 8.g4 >>>>0:04 8/9 -4.02 414062 1.h7+ Kxf7 2.h8=Q a1=Q 3.Qh5+ Kf8 >>>> 4.Qf3+ Ke7 5.Qe4+ Kd6 6.Qg6+ Kc5 >>>> 7.Qf5+ Kd4 8.Qg4+ Kd5 9.Kh4 >>>>0:09 9/10 -3.93 898261 1.h7+ Kxf7 2.h8=Q a1=Q 3.Qh5+ Kf8 >>>> 4.Qf3+ Ke7 5.Qe4+ Kd6 6.Qg6+ Kc5 >>>> 7.Qf5+ Kd4 8.Qf6+ Kd3 9.Qg6+ Kc4 >>>> 10.g4 >>>>0:20 10/11 -3.76 2026714 1.h7+ Kxf7 2.h8=Q a1=Q 3.Qh5+ Kf8 >>>> 4.Qf3+ Ke7 5.Qe4+ Kd6 6.Qg6+ Kc5 >>>> 7.Qf5+ Kc6 8.Qe6+ Kc7 9.Qf7+ Kc8 >>>> 10.Qf8+ Kb7 11.Qf7+ Kb6 >>>>0:49 11/12 -3.63 4752637 1.h7+ Kxf7 2.h8=Q a1=Q 3.Qh5+ Kf8 >>>> 4.Qf3+ Ke7 5.Qe4+ Kd6 6.Qg6+ Kc5 >>>> 7.Qf5+ Kc6 8.Qe6+ Kc7 9.Qf7+ Kc8 >>>> 10.Qe6+ Kb7 11.Qd7+ Ka6 12.Qd5 >>>>1:39 12/13 -3.53 10149051 1.h7+ Kxf7 2.h8=Q a1=Q 3.Qh5+ Kf8 >>>> 4.Qf3+ Ke7 5.Qe4+ Kd6 6.Qg6+ Kc5 >>>> 7.Qf5+ Kc6 8.Qe6+ Kc7 9.Qf7+ Kc8 >>>> 10.Qf8+ Kb7 11.Qe7+ Kb8 12.Qd8+ >>>> Ka7 13.Qc7+ Ka6 >>>>4:01 13/14 -3.42 25036829 1.h7+ Kxf7 2.h8=Q a1=Q 3.Qh5+ Kf8 >>>> 4.Qf3+ Ke7 5.Qe4+ Kd6 6.Qg6+ Kc5 >>>> 7.Qf5+ Kc6 8.Qe6+ Kc7 9.Qf7+ Kb6 >>>> 10.Qe6+ Kb5 11.Qd5+ Kb4 12.Qe4+ >>>> Kc3 13.Qe5+ Kc2 14.Qd5 >>>>7:53 14/15 -3.35 50033731 1.h7+ Kxf7 2.h8=Q a1=Q 3.Qh5+ Kf8 >>>> 4.Qf3+ Ke7 5.Qe4+ Kd6 6.Qg6+ Kc5 >>>> 7.Qf5+ Kc6 8.Qe6+ Kc7 9.Qf7+ Kc8 >>>> 10.Qf8+ Kb7 11.Qf7+ Kb6 12.Qg6+ >>>> Kb5 13.Qd3+ Kc6 14.Qg6+ Kd5 15.Kf4 >>>> >>>>jm >>> >>>I'm just curious John, who had the White pieces and how did the game end? >>>Did White get a draw, or let it slip away into a loss? >>> >>>There is no question about it that 1.h7+!! is not only the "Best" move but a >>>"Forced" move as well. >>> >>>Everthing else loses quikly! >>> >>>Terry >> >>White resigned in this position. I was Black. This should show you the quality >>of our play here at the CM offices. ;-) >> >>jm > >LOL! Thanks, however it's not so easy to see this draw accurately over the >board, so your opponant shouldn't feel too bad for missing the draw. >Nor you if you missed it! I know I'd have to think hard to keep the King in >check!;) > > >Here's a position, which is easy for computers for about 15 years well before >5 and 6 man EGTB's or 4 in this case on micros. > >My old Mach III Master finds the drawing move instantly but needs to run to >about 16 ply to see the draw is forced. > >Never even bothered to give this problem to modern chess programmes with or >without tablebases. > > >In this position White is to move and can draw, I'll quote an excerpt from >Technique in Chess by Gerald Abrahams, copyright 1961. Opps....I hope I'm not >in trouble for doing this!;) > >I remember solving this problem 21 years ago, when first learning the game. >I think at the time it took me 20 min. to see all variations, not too bad for a >beginner!:o) > >Now it looks like child's play, yet it does stump most beginners and even some >good players who don't fully understand King and Pawn endings. > >I find it amusing when the "truth" is buried in such a simple pawn ending:o) >Oh White was a master if I'm not mistaken?:o)) > > "The Rocket-propelled King" A study by Richard Reti. > >The position in the diagram was actually reached, in 1921, in a game played in >Berlin. White confidently resigned. It was left to the genius of Reti to >discover the draw. The King is terribly far from the Black pawn, and is far too >slow to catch it in an ordinary way; but there is something in this position >that seems to accelerate it tremendously. > > >[D]7K/8/k1P5/7p/8/8/8/8 w - - > >Please no computers! Unless they are micros over 15 years old;) > >Terry
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