Chess Board
[ECO code C42] Move Move Here
PETROFF'S DEFENCE
The Close Variation
White advanced his QP (freeing his QB) and may intend a further P-Q5(d5) advance.
Black's K5(e4) Knight returns to KB3(f6), deters P-Q5 and anticipates a usual 6.B-Q3. B-Alt.
    White  Black	White  Black
 1. P-K4   P-K4	     5.	P-Q4   Kt-KB3
 2. Kt-KB3 Kt-KB3
 3. KtxP   P-Q3
 4. Kt-KB3 KtxP
WHITE to Move or Undo or Jump or Clear
 
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