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Normal Topic Kantorovich/Steckner (DEM 9-144) g5-g4 update (Read 3603 times)
Poghosyan V
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Re: Kantorovich/Steckner (DEM 9-144) g5-g4 update
Reply #1 - 04/21/14 at 06:05:14
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The refutation of my line 7…Ke6? is very convincing. In my analysis I have overlooked the idea of the intermediary check 15.Re8+.
My congratulations!

The move 7…Ke7! saves the Black. By the way, I have analysed the position after 7…Ke7! 8.Kb5 Rb2+ 9.Kc6 Rc2+ 10.Kb7 Rb2+ in my posting  Re: Regarding Bacrot-Robson Reply #22 - 11/07/11 at 20:31:45.  The position arises there in 2 lines – 3.Ra8 B)3…Ke7 B2) 4.Kc6 Rc2+ 5.Kb7 Rb2+ and 3.Kc4 Ke6 4.Kc5 Rc2+ 5.Kb6 Rb2+ 6.Kc7 Ra2 7.Ra8 B1b) Ke7 B1b3) 8.Kb7 Rb2+.
« Last Edit: 04/21/14 at 07:25:27 by Poghosyan V »  
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John_Hall
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Kantorovich/Steckner (DEM 9-144) g5-g4 update
04/20/14 at 15:39:41
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A few weeks ago I bought Dvoretsky's Endgame Manual (2nd Edition) and was intrigued by the innovations since Fine, particulary in Rook and pawn endgames with outside passed pawn and enemy Rook behind.
With the result of many of the critical endings now on the knife edge of a single tempo, I found several improvements on the published material and see many of these have already been exposed.
In the Kantorovich/Steckner position I did not see Poghosyan's drawing plan of g5-g4 (I was looking at g5+Kg6 like Aagaard) but I may have found a refinement in one Poghosyan g5-g4 line.

Kantorovich/Steckner (DEM9-144)
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1.Kd4 g5! 2.Kd5 g4 (= Poghosyan, 2…Kg6= Aagaard) 3.Kd6 Rd2+ 4.Kc5 Rc2+ 5.Kb5 Rb2+ 6.Kc4 Ra2! 7.Ra8

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Dvoretsky analysed a loss after 7…Kf5? and Poghosyan gave 7…Ke6? 8.Kb5 Rb2+ 9.Kc6 Rc2+ 10.Kb7 Rb2+ 11.Ka7 Rxf2
Now after 12.Rh8! Rf3 instead of 13.Rxh5? Rxg3= we have 13.Kb6 (or Kb7) Rb3+ 14.Kc6! Ra3 15.Re8+! (15.Kb5? Kd7=) Kf5 16.Kb5 wins
If 14…Rc3+ 15.Kb5 Ra3 (15…Rb3+ 16.Ka4 Rb1 17.Rxh5 f5 18.Ka5 wins) 16.Rxh5 Rxg3 17.Rg5 Rb3+ 18.Ka4 Rb8 19.Rxg4 mate in 25

This bullying check of the Black King can be avoided by:
7…Ke7! 8.Kb5 Rb2+ 9.Kc6 Rc2+ 10.Kb7 Rb2+ 11.Ka7 Rxf2 12.Rh8 (12.Rb8 Kd6! draws Poghosyan) Rf3 13.Kb6 Rb3+ 14.Kc5 (or Kc6) Ra3! (14…Rc3+? 15.Kb5 +-) 15.Kb5 Kd7 16.Rxh5 Rxg3 17.Rg5 Kc7 18.Rg8 Rb3+ 19.Ka4 Rb8 20.Rxg4 Rh8 draw

  
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