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Tigran Vartanovich Petrosian vs Wolfgang Uhlmann
Chess Olympiad Final-A (1968), Lugano SUI, rd 10, Nov-03
King's Indian Defense: Saemisch Variation. Normal Defense (E81)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Dec-23-07  notyetagm: Petrosian vs Uhlmann, 1968

Position after 35 ♖d4xd6!:


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35 ♖d4xd6! is a lovely tactical shot by Petrosian.

The point is that the sequence 35 ... ♕c5x♖d6 36 ♖d1x♕d6 ♖d8x♖d6


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<FORCES> Black to have two <UNDEFENDED> pieces (a3-knight, d6-rook) that are also <LINED UP> with each other, allowing White to win material with the simple <QUEEN FORK> 37 ♕f2-c5.


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So, in this line, White plays <FORCING MOVES> (captures) that <FORCE> his opponent to have <UNDEFENDED> piece and <FORCE> his opponent to <LINE UP> his pieces.

Your opponent is not simply going to create these tactical liabilities of his own volition (unless he blunders); rather, you must <FORCE> your opponent to make <UNDEFENDED> pieces and <LINE UP> his pieces by using <FORCING MOVES>, just like Petrosian does here.

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