Chess Board
[ECO code B02]
TRANSPOSITION
ALEKHINE'S DEF. to SICILIAN DEF. (Alapin V.)
White set his QBP on QB3(c3) to support 4.P-Q4 - a rare move, as failure to attack the knight or take control of QB5(c5) risks a Sicilian in reply.
Black transposes into the Alapin variation of the Sicilian Defence by advancing his QBPawn to QB4(c5) ready to meet a likely 4.P-Q4. 
    White  Black    Transp.White Black
 1. P-K4   Kt-KB3   (1.	P-K4   P-QB4 )
 2. P-K5   Kt-Q4    (2.	P-QB3  Kt-KB3)
 3. P-QB3  P-QB4    (3.	P-K5   Kt-Q4 )
Continue: Transpose or Undo or Jump or Clear