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Tigran Vartanovich Petrosian vs Aleksandar Matanovic
Portoroz Interzonal (1958), Portoroz SLO, rd 5, Aug-12
Queen's Gambit Declined: Ragozin Defense (D38)  ·  1-0
ANALYSIS [x]

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Kibitzer's Corner
Dec-09-06  notyetagm: 23 ♖x♗a8!, another example of the <FORK-OVERLOAD TRICK> but strangely not involving the enemy king.

As always, the problem for the defending Black rook is that it is <OVERWORKED>. The Black c8-rook is the -only- defender of the loose Black c3-queen but it is also the -first- defender of the Black a8-bishop because it blocks the line of the Black f8-rook which -also- defends the Black a8-bishop.

See, that is the whole point of this particular tactical trick. The Black c8-rook cannot be the -first- defender of the Black a8-bishop and the -only- defender of the Black c3-queen. The attacker will make the <OVERWORKED> defender go to where it is the first defender (the Black a8-bishop, 23 ♖x♗a8!), thereby <DEFLECTING> it from where it is the only defender (the Black c3-queen). Very nasty.

23 ♖x♗a8! and then

23 ... ♖x♖a8? <deflection from c3> 24 ♕x♕c3

23 ... ♕x♕a1 24 ♖x♕a1 <rubberband>

Jul-17-09  totololo: The final Rxa8 can be seen for many moves as elimination of the defender.... still Black falls for it! UNBELIEVABLE!
Jul-17-09
Premium Chessgames Member
  Fusilli: <totololo> <UNBELIEVABLE!> I agree. Not at this level.
Jul-18-09
Premium Chessgames Member
  whiteshark: What was blacks best <22...> then?
Jul-18-09
Premium Chessgames Member
  Fusilli: <whiteshark> 22...Qb4, I'd say. White has a clear advantage (black's pieces are a bit tied up and not well coordinated, which seemed to happen often to Petrosian's opponents!) but at least he is still alive.
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