The "Game about Squares" is NP-hard

Jens Maßberg

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arXiv · 1408.3645

The "Game about Squares" is NP-hard

Jens Maßberg

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Abstract

In the "Game about Squares" the task is to push unit squares on an integer lattice onto corresponding dots. A square can only be moved into one given direction. When a square is pushed onto a lattice point with an arrow the direction of the square adopts the direction of the arrow. Moreover, squares can push other squares. In this paper we study the decision problem, whether all squares can be moved onto their corresponding dots by a finite number of pushes. We prove that this problem is NP-hard.

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Jens Maßberg. 2014-08-15. The "Game about Squares" is NP-hard. https://arxiv.org/abs/1408.3645

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