Actually, I think it's probably tougher. Square-1 has 340 possible shapes for the puzzle to take on. If I worked out the math correctly, this one has something like 880, assuming the puzzle is oriented around one of the 2x2 pieces. I tried coming up with a solution to this one some time ago and put it on hold when I took some classes last term. I think it's about time I started up again.

L8r.