Van't Kruijs Opening is a chess opening with the ECO code A00. It goes 1. e3. White opens with 1. e3 (the Van't Kruijs move). After 1 move it is Black to move. The lesson on the board explains every move of the line and lets you play it yourself; it is free.
White starts with 1.e3, a modest move that opens lines for the f1 bishop and the queen. It often transposes to other openings.