Close Blast Targeting Options

Question

The Rules Compendium (and Player's Handbook) provides two examples of how to use a Close Blast 3. and

Where w is the wizard casting Thunderwave (for example). These are the options my group has used. A recent rereading of the rules has led us to ask if the below is valid.

Answer 1

Yes, that's valid. As long as one of the blast's squares is adjacent to your character, it's a legal placement.

A blast fills an area adjacent to you that is a specified number of squares on a side.

Your example is the specified number of squares (three), and it is adjacent to the caster.