More prophylaxis. At this moment a draw was agreed, but let's see what would have happened if White carried on with his plan.
Thanks to his clever second move Black manages to regroup his knight to e5 with an excellent game.
By avoiding a check on f4 in advance White maintains maximum flexibility in his central attack.
6...Qa5 was correct. although after 7.Rd4 , preparing b2-b4, White keeps the advantage.
With the double threat of 9 Nd4 and 9 Rxa7. White is practically winning.