Tetris AI System
You've probably always wanted a system that reads a Tetris game via a webcam, decides the optimum move, and then inputs the commands to make that move, right? Well, now your prayers are answered.
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Being NP-hard means there are no existing polynomial-time algorithms to find the *optimal* solution. That doesn't mean it is impossible to write a program that can find *good* solutions. Moreover, NP-Hard problems get really impossible for higher instances. For small instances of NP-Hard problems, brute force search is still feasible.
Another point is that the article you mentioned discusses a restricted version of Tetris.
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