Chess Board
[ECO code C21]
TRANSPOSITION
CENTRE GAME to SCOTCH GAME (main)
White's king's-side knight recouped the earlier pawn, removing Black's doubled QP on Q4(d4).
Black transposes into the Scotch Game main line by developing his Queen's Knight to QB3(c6) for a doubled attack against White's knight.
    White  Black    Transp.White Black
 1. P-K4   P-K4		  (1.)
 2. P-Q4   PxP	    (2.	Kt-KB3 Kt-QB3)
 3. Kt-KB3 B-B4	    (3.	P-Q4   PxP   )
 4. KtxP   Kt-QB3   (4.	KtxP   B-B4  )
Continue: Transpose or Undo or Jump or Clear