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Alien Tiles
By Cliff Pickover and Cam Mckechnie
Description
Alien Tiles is a vivid and fiendishly difficult puzzle game.
How to Play
Click on any tile in the array and all tiles in the same row and column advance by one color in a cycle from red to green to blue to purple and finally back to red. Try it. You can always start over again by selecting the "Start" button.

Objective
First Goal: Starting from all red, your goal is to make every cell in the puzzle turn all green, blue, or purple in as few moves as possible. Are you certain your solution requires the least number of moves?

Second Goal: Starting from all red, create a board that is all purple except for a single, central red tile.

Third Goal: Inside the 7x7 array, create a Xenoplastic Diamond -- a rotated 4x4 square of one color inlaid within tiles all of another color.