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Murtas Muratovich Kazhgaleyev vs Judit Polgar
Villa de Canada de Calatrava (2007), Canada de Calatrava ESP, rd 4, Apr-07
King's Indian Defense: Makagonov Variation (E71)  ·  0-1
ANALYSIS [x]

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Kibitzer's Corner
Apr-18-07  kingsindian2006: RC7, clinches mate with any combo by black.. all it needs is the knight and rook to mate
Jun-02-07  notyetagm: Position after 40 ♔g1-f2


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In this position Judit had previously noticed that 40 ... ♖b1-f1 would be mate if it weren't for the e3-flight square of the White f2-king.

So Judit is just one square away from trapping the White king. What do you do when you want to <TRAP> an enemy piece that has few flight squares? You force the opponent to <SELF-BLOCK> the flight squares!

Here Judit forces White to <SELF-BLOCK> the e3-flight square of the White f2-king by playing 40 ... ♗c3-d4+!.

Position after 40 ... ♗c3-d4+!


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This is the critical move that White missed when he blundered and played 39 ♗e3xg5??. After 40 ... ♗c3-d4+!, the only way that White can get out of check is with 41 ♗g5-e3 or 41 ♖f3-e3, putting a White piece on the e3-square, <SELF-BLOCKING> it so that the White f2-king can no longer flee there. The result is that both 41 ♗g5-e3 (<SELF-BLOCK>) and 41 ♖f3-e3 (<SELF-BLOCK>) are met by the <ARABIAN MATE> 41 ... ♖b1-f1#.

Position after 41 ♗g5-e3 <self-block> ♖b1-f1#


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Position after 41 ♖f3-e3 <self-block> ♖b1-f1#


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Mar-29-08  notyetagm: If the enemy king has only -one- <FLIGHT SQUARE> (e3-square), what do you do?

Black to play: 40 ... ?


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Play a <FORCING MOVE> (40 ... ♗c3-d4+!) which <FORCES> your opponent to occupy (<SELF-BLOCK>) that <FLIGHT SQUARE> (41 ♗g5-e3, 41 ♖f3-e3).

Position after 40 ... ♗c3-d4+! 0-1


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Now your opponent's king has no <FLIGHT SQUARES> and you can mate him (41 ... ♖b1-f1#).

Position after 40 ... ♗c3-d4+! 41 ♗g5-e3 ♖b1-f1#


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Only -one- <FLIGHT SQUARE> for the enemy king (or an enemy piece) means <FORCE> a <SELF-BLOCK>!

Here Judit Polgar gives a textbook example of that principle.

Mar-29-08  mistreaver: Yea but Bxg5 wasn't so big blunder as game was hopeless for white.The only way to give to fend of the mate was Rf1 when after Rb2+ White loses rook. Am i missing something?
Mar-20-15
Premium Chessgames Member
  ChessCoachClark: Continuation results in a Hook Mate case at the master level.
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Featured in the Following Game Collections[what is this?]
Exchange sacs - 4
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40 - Bc3-d4+! makes White self-block e3-square for 41 - Rb1-f1#
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