Chess Board
[ECO code C42] Do not scroll the screen..! Move Here Move Move Move Here Move Here Move Here Move Here
PETROFF'S DEFENCE
Black's Q3(d6) pawn push on to Q4(d5) lost the tempo gained earlier but opened his KB diagonal, defended his KKt and deterred 6.B-QB4.
White develops his King's Bishop to Q3(d3) to threaten Black's KKt, and enables short castling.
    White  Black	White  Black
 1. P-K4   P-K4	     5.	P-Q4   P-Q4
 2. Kt-KB3 Kt-KB3    6.	B-Q3
 3. KtxP   P-Q3
 4. Kt-KB3 KtxP
BLACK to Move or Undo or Jump or Clear
 
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Chess Board

BLACK moves King's Bishop:

B-Q3 (Bd6) or B-K2 (Be7) ?

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