Click a thumbnail to see its larger version and description.
All diagonal, horizontal and vertical rows add up to 15.
This puzzls was shown in the book "Puzzles Old and New How to Make and Solve Them" which was published in 1986. This gives an upper bound for this puzzles publication.
If you're looking to buy, eBay is the one place you can find almost anything... if you're willing to wait for it, then pay the price!
Thank you to the following people for their assistance in helping collect the information on this page: Sandy.
Found a mistake or something missing? Edit it yourself or contact the moderator.