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Description
Sixteen pieces, each bearing one of four symbols in one of four colors must must be rearranged on the grid. If you solved it, the final product should not feature any vertical or horizontal line containing two or more pieces of the same symbol or color.

First Known appearance: The Crystal Maze (s3e2)

Description
Sixteen pieces, each bearing one of four symbols in one of four colors must must be rearranged on the grid. If you solved it, the final product should not feature any vertical or horizontal line containing two or more pieces of the same symbol or color.

First Known appearance: The Crystal Maze (s3e2)