Chess Board
[ECO code C42] Move Move Here
PETROFF'S DEFENCE
Lasker Variation
White's Queen's Pawn out to Q3(d3) frees his QB and doubles an attack on Black's centre knight.
Black's K5(e4) Knight best withdraws, returning to KB3(f6), and both queens are now equally pinned.
    White  Black	White  Black
 1. P-K4   P-K4	     5.	Q-K2   Q-K2
 2. Kt-KB3 Kt-KB3    6.	P-Q3   Kt-KB3
 3. KtxP   P-Q3
 4. Kt-KB3 KtxP
WHITE to Move or Undo or Jump or Clear
 
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