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Profile of lnlver
This puzzle is at least 60 years old; I remember it from around 1960. It consists of 12 pieces, which are to be arranged to form an 8x8 checkerboard. The original puzzle was made from plastic; I made my own version out of wood. I have found three different solutions.

Does anyone out there know any details about where this puzzle came from, who developed it, etc.? It might have been in conjunction with a contest; i.e., whomever came up with the most solutions would win a cash or merchandise prize.

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Profile of landmark
See Solomon Golomb's book Polyominoes:

I was given this book as a teen-ager and it included a set of the 12 pentominoes. In the picture above, you have some pentominoes there, along with some hexominoes, triminoes, and even a septomino. This book is really good, gives you lots more puzzles and theory about them.
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Profile of MeetMagicMike
They are also described in one of Martin Gardener's books.
Magic Mike

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