Alekhine's defence - Steiner variation
1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. b3
White advances the king's pawn to e4. Black develops the knight to f6. White pushes the king's pawn to e5.
Black moves the knight to d5. White moves the c-pawn to c4. Black jumps the knight to b6.
White pushes the b-pawn to b3.