Attacking motive in the Queen's gambit

I played this game against a Slovakian International Master.

Instead of Qa5 he moved back to e7 with the bishop in the Queen's gambit declined and allowed me to create him an isolated pawn on d5. After the development of the pieces he tried to exchange it with d5-d4 which I prevented with e3-e4. My idea was to gain space and attack his king. He wanted to attack on the other side, but missed a nice tactics:

I went to run in the next day to stay fit and get some fresh air.

You can watch the first 2 sessions of my tactics training:

2nd session:

I updated my webpage and added a visualization test. You can check it here: http://atillaturzo.com/ 

If you would like to improve, please check the article about my coaching philosophy and methods in this article: