Surplus Tetramino Puzzle

The Puzzle:

Surplus Tetramino

If you re-assemble the pieces of each of the four compositions shown below, three of them will be the same shape and one won't.

Which is the odd one out?


Author: Peter Grabarchuk
This Puzzle © 2007 Peter Grabarchuk. All Rights Reserved.
More from Peter Grabarchuk at PeterPuzzle.com

Do you have the answer? Check against our solution!