Chess Board
[ECO code A56] Move Move Move Here Move Here
MODERN BENONI DEFENCE
Petrosyan System (aka. Czech Benoni)
White developed his QKt to QB3(c3), tripled his QP defence and supported a likely P-K4 advance.
Black's Queen's Pawn out to Q3(d6) supports his QBP+QP and frees his QB.
     White   Black
 1.  P-Q4    Kt-KB3
 2.  P-QB4   P-B4
 3.  P-Q5    P-K4  Alt. 4B,3B route
 4.  Kt-QB3  P-Q3  Alt. Old Ben. route
WHITE to Move or Undo or Jump or Clear
 
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