Chalice edge matching puzzle

Most children’s programs in congregations are pretty touchy-feely, which means that kids (and adults) who love logical/mathematical thinking can feel a little left out. So here’s an edge matching puzzle, with obligatory flaming chalice designs so it can masquerade as religiously educational, which can be fun for both children and adults (since this type of puzzle is NP-complete, there is no fast and easy solution). The image below links to a PDF, with instructions for cutting out the nine puzzle pieces and solving the puzzle.

PDF of Chalice Edge Matching Puzzle, 13 May 2011

P.S. No, I’m not going to give you the solution, because I know you don’t really want it.

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