How to play
You complete Norinori when every region contains two black cells and every black cell has exactly one orthogonally adjacent black partner. The full Norinori position determines the outcome; visual shortcuts never replace the documented Norinori terminal rule.
- Norinori begins with an unnumbered grid divided into regions, each of which must ultimately contribute two black cells. The Norinori deal identity and Nikoli Norinori rules v1 are stored together. Restarting Norinori reproduces this opening exactly.
- During Norinori, you shade or clear cells and mark exclusions while checking each region count and whether black cells can form disjoint adjacent pairs. The Norinori engine rejects profile violations, unavailable material, and every action attempted after Norinori reaches a terminal result.
- You complete Norinori when every region contains two black cells and every black cell has exactly one orthogonally adjacent black partner. The full Norinori position determines the outcome; visual shortcuts never replace the documented Norinori terminal rule.
Strategy tips
- A reliable Norinori plan is to identify cells whose only possible partner lies across a region boundary and use completed dominoes to exclude their other neighbours. A Norinori hint is legal and deterministic. The next Norinori hint exposes one bounded action; it never claims a forced Norinori win.
- A costly Norinori mistake is to assume the two black cells of a region must touch each other; a domino may pair cells belonging to different regions. Undo supports studying that Norinori decision, while restart preserves the original seeded Norinori opening.
- In the Norinori endgame, match the last unmatched black candidate across a boundary and confirm it creates no chain of three shaded cells. Check every remaining Norinori action before committing because its terminal rule is enforced immediately.