The grid contains exactly 13 nodes and 13 lines. Each node is on three lines and each line lies on three nodes. In addition there are exactly 13 letters and each letter is used exactly three times to trace out the 13 lines. We propose several puzzles and games that use this grid.
"Class of 13,"
Word Ways: Vol. 46
, Article 17.
Available at: http://digitalcommons.butler.edu/wordways/vol46/iss3/17