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arxiv: 2502.13536 · v1 · pith:TTDUZDPMnew · submitted 2025-02-19 · 💻 cs.DM · cs.CG· cs.DS

Slant/Gokigen Naname is NP-complete, and Some Variations are in P

classification 💻 cs.DM cs.CGcs.DS
keywords constraintsnp-completepuzzleslantsomealgorithmsconnectivitycorrespond
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In this paper we show that a generalized version of the Nikoli puzzle Slant is NP-complete. We also give polynomial time algorithms for versions of the puzzle where some constraints are omitted. These problems correspond to simultaneously satisfying connectivity and vertex degree constraints in a grid graph and its dual.

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