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1. Introduction to crosspatches

Crosspatch puzzles, also known as Kriss Kross puzzles in copyrighted Dell publications, have been around for many decades. Wikipedia calls them Fill-In puzzles, but gives no history.

In this form of puzzle, the solver is given a crossword-like grid, and a list of words that must be arranged so that they all interlock.

Here is a trivial puzzle with only four words, shown after its solution:

In some puzzles, one or more words, or in rare cases single letters, will be provided initially.