Chess Board
[ECO code E00]
TRANSPOSITION
CATALAN OPENING to BOGOLJUBOW DEFENCE
Black's queen defended his threatened bishop.
White transposes into the Nimzowitsch Variation, main line of the Bogoljubow Def. by developing his King's Knight to KB3(f3) in support of his QP.
    White  Black    Transp.White Black
 1. P-Q4   Kt-KB3	  (1.)
 2. P-QB4  P-K3		  (2.)
 3. P-KKt3 B-Kt5 ch (3.	Kt-KB3 B-Kt5 ch
 4. B-Q2   Q-K2	    (4.	B-Q2   Q-K2   )
 5. Kt-KB3	    (5.	P-KKt3	      )
Continue: Transpose or Undo or Jump or Clear