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Harmen Jonkman vs Ivan Sokolov
Essent ch-NED (2002), Leeuwarden NED, rd 1, Jun-20
Four Knights Game: Spanish Variation (C48)  ·  0-1
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Nov-13-05  notyetagm: Wow, the winning combination here is very similar to a famous Botvinnik pinning combination. Here Sokolov sacrificed to absolutely pin the White queen to her king along the g-file (36 ... ♗xg2! 37 ♕xg2) and then Black took what the newly pinned White queen no longer defended, the d2-rook (37 ... ♖xd2). Botvinnik created an absolute pin of the White queen to her king on the a8-h1 diagonal by a combination that looked like 1 ... ♕xg2+! 2 ♕xg2 ♖xd2 3 ♕xc6 bxc6.

The common theme is to <sacrifice to create a pin and then exploit the resulting pin by taking what the newly pinned piece no longer defends>.

Dec-17-05  notyetagm: This really is a nice pinning combination by Sokolov, 36 ... ♗xg2! 37 ♕xg2 ♖xd2. Of course he had to see all the way to the end (38 ♕xg6+ ♔xg6 39 ♗f7+ ♔xf7 40 ♖xc8) because <you must not end your calculations without examining your opponent's forcing moves> in the goal position. The net result is that Sokolov is a pawn up in rook ending that Sokolov converts into the full point with ease.
Dec-20-05  EmperorAtahualpa: What is the continuation after 37.Rxd8?
Dec-21-05
Premium Chessgames Member
  crafty: 37. ♖xd8 ♗xh3+ 38. ♔h2 ♖xd8 39. ♖c3 ♗g4 40. ♖d3 ♖xd3   (eval -2.56; depth 14 ply; 100M nodes)
Dec-21-05  EmperorAtahualpa: Thanks <crafty>! In the meantime, I found out that if 37.Rxd8 Bxh3+ 38.Kh2 Rxd8 39.Kxh3??, it loses the rook on c1 because 39...Qg4+ 40.Kh2 Qh5+ Kg3 41.Qg5+ Kh3 42.Qxc1!
Aug-07-10  notyetagm: See 20 ♗c3xg7! in <Salgado Lopez vs Dimitrov World Junior Championship (1) 2010> for another example of the 36 ... ♗e4xg2! <EXCHANGE ON THE PINNING SQUARE> tactic.
Jan-11-11  notyetagm: Game Collection: EXCHANGE ON THE PINNING SQUARE
Feb-20-11  notyetagm: Game Collection: EXCHANGE ON THE PINNING SQUARE: NOT A DEFENDER
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