A Scramble Squares puzzle consists of nine square pieces with half of
an image on each side. To solve the puzzle the pieces are arranged in a
grid so
that sides of adjacent pieces form complete images. A repetition is a half-image that
appears more than once on a piece. Previous research uses a graph-theoretical approach
to establish necessary and sufficient conditions for solutions without repetitions to
Scramble Squares puzzles. We use a similar approach to establish
necessary and sufficient conditions for solutions with repetitions to
Scramble
Squares puzzles.
