This piece was created to mix things up a bit on the board game Cathedral. This piece would actually replace the cathedral piece on the game.
This piece would replace the cathedral and each player would need to remove one of the corner pieces (equals 3 squares).
You may also be able to remove the bridge pieces as well, but I have confirmed that you can fill the board with 2 corner pieces removed.
This piece almost snaps in, it is so snug on the plastic Cathedral set.