Abstract

The Link-a-Pix puzzle, which is also known as Piczle , PathPix , Pictlink , Number Net , or Paint by Pairs , is a popular picture logic puzzle game where the player paints a grid by linking the hint points with number–color labels to obtain the solution as a pixel art picture. In this article, we propose a joint depth first searching and linear programming aided algorithm for the sake of automatically solving the Link-a-Pix puzzle. The experiments implemented on 40 puzzles with various types verify the effectiveness and feasibility of our proposed solver, which is conducive to both designing and solving the Link-a-Pix puzzles and related applications.

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