A variant crossword
puzzle in which each square
can hold one, two, or three letters. (On occasion, a version of this puzzle appears where there is no upper limit to the number of letters per square.)
For instance, if everything and Evel Knievel were 1-across and 1-down respectively, the "eve" might go in the first square. Or they might not -- it's up to you to figure out. However, more often than not, two crossing words will share as many letters as they possibly can.
Part of the puzzle here is to figure out the lengths of the words and how many letters go in each square.
This puzzle is known by different names in different publications. GAMES Magazine simply calls it One, Two, Three, while others refer to it by the name here, or Crushword, or other names. In the National Puzzlers League the equivalent form (which is of the "no upper limit" variety) is called a variogram (followed by the name of whatever type of form it is, such as square or diamond).