Amsterdam Attack is a chess opening with the ECO code A00. It goes 1. e3 e5 2. c4 d6 3. Nc3 Nc6 4. b3 Nf6. White opens with 1. e3 (the Van't Kruijs move) and Black answers 1... e5. After 8 moves it is White to move. The lesson on the board explains every move of the line and lets you play it yourself; it is free.