Depicted here is an innocent-looking letter square. The square was devised by Dr. Jean C. Sabine, of Belmont, California. Dr. Sabine's square presents our readers with a remarkable problem in "word chess," an exercise that has previously appeared in the "Simplicissimi" section of WORD WAYS.
Sabine, Jean C.
"Word Chess With a Vengeance,"
Word Ways: Vol. 1
, Article 15.
Available at: http://digitalcommons.butler.edu/wordways/vol1/iss4/15