Reading Mike Keith's article "Scrabble-Tile Double Word Squares and Rectangles" (WW Feb 2011) led me to ask the following question: which of the word grids he gave are actually legal positions in a game of Scrabble? Chess problemists use the term "retrograde analysis" for the study of how chess positions might have arisen in a legal game; this concept is of course equally applicable to other games, including Scrabble.
"Scrabble and Retrograde Analysis,"
Word Ways: Vol. 44
, Article 7.
Available at: http://digitalcommons.butler.edu/wordways/vol44/iss3/7