Through the method of text word, matrix elements are combined to get the mixed matrix of single words and double words
The number of 6x6 double word
squares constructible with TWL06 is about 1/200th the number of 5x5 squares, and the odds of a tour accidentally spelling six 6-letter words is significantly smaller than the odds of spelling five 5-letter words.
What is the largest double word
square or rectangle (containing a different English word in each row and column) that can be formed from the 98 non-blank Scrabble tiles?
The above squares are the analogue of double word
squares are, of course, more difficult, but there are 20 different possibilities, from OBAMA and BIDEN in lines 1 and 2 to BIDEN and OBAMA in lines 4 and 5.
This is intermediate in difficulty between an 8-by-8 and a 9-by-9 double word
square, the latter of which has never been done in English.