Chess Board
[ECO code C47]
TRANSPOSITION
ITALIAN 4KTS. to GIUOCO PIANO (4Kts. Var.)
White's KB move is sometimes played late in error.
Black transposes into the Four Knights variant of the Giuoco Piano or 'Italian Game' (though 4..KtxP is best by far) by developing his King's Bishop to QB4(c5), enabling rapid castling. B-Alt. 
    White  Black   Transp.White Black
 1. P-K4   P-K4		  (1.)
 2. Kt-KB3 Kt-QB3  	  (2.)
 3. Kt-B3  Kt-B3    (3.	B-B4   B-B4 )
 4. B-B4?! B-B4?!   (4.	Kt-B3  Kt-B3)
Continue: Transpose or Undo or Jump or Clear