LITS

LITS, formerly known as Nuruomino (ヌルオミノ), is a binary determination puzzle published by Nikoli.

Moderately difficult LITS puzzle (solution)

Rules

LITS is played on a rectangular grid, typically 10×10; the grid is divided into polyominoes, none of which have fewer than four cells. The goal is to shade in a tetromino within each pre-printed polyomino in such a way that no two matching tetrominoes are orthogonally adjacent (with rotations and reflections counting as matching), and that the shaded cells form a valid nurikabe: they are all orthogonally contiguous (form a single polyomino) and contain no 2×2 square tetrominoes as subsets.

History

The puzzle was first printed in Puzzle Communication Nikoli #106; the original title is a combination of 'nuru' (Japanese: "to paint") and 'omino' (polyomino). In issue #112, the title was changed to the present one, which represents the four (of five) tetrominoes used in the puzzle: the L-shape, the straight, the T-shape, and the skew (square tetrominoes may never appear in the puzzle as they are a direct violation of the rule).

gollark: Is it going to just send a description of what to draw? In that case, lots of overhead and problems porting to different environments since for example each GUI framework will end up needing its own module communication layer.
gollark: For one thing, is a module just going to be allowed somehow to draw on the region of the screen it's meant to be set up for?
gollark: Yes it is.
gollark: These "modules", they could communicate over some sort of unified IPC framework with some standard format or whatever, but probably each language/framework would end up having to implement its own method of rendering what gets sent over.
gollark: They can just send JSON-serialized messages or whatever, it's just slower than using one binary.

See also
  • List of Nikoli puzzle types
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