Chess Board
[ECO code C23] Move Move Here
BISHOP'S OPENING - Classical Var.
(to) Petroff Gambit

White's QBP push supported a planned 5.P-Q4 advance.
Black develops his Queen to K2(e7) (sometimes called the queen's natural defensive square). The line is superior to transposing out. B-Alt.
     White   Black
 1.  P-K4    P-K4
 2.  B-B4    B-B4
 3.  Kt-KB3  P-Q3
 4.  P-B3    Q-K2  Transp.from Phil.V.

WHITE to Move or Undo or Jump or Clear
 
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