The short-term goal of 4...Nd7 is to make developing his pieces easier by trading a pair of knights without damaging his pawn structure by the direct 4...Nf6. Play is similar to the Classical variation except that Black is not forced to play his QB to the g6 square. However, this freedom comes at a cost as White is able to take up space in the center. White often plays the aggressive 5.Ng5!? pressuring key points such as the f7-square.