LITS Puzzle

About LITS Puzzle

A Nikoli-style logic puzzle where you shade tetromino shapes (L, I, T, S) in each region of the grid, with constraints on adjacency, connectivity, and 2x2 blocks.

Description provided by GameZipper.

How to play

1. The grid is divided into bold-edged regions. Each region must end up containing one shaded tetromino (L, I, T, or S shape).
2. Tap a cell to shade it. Tap again to unshade. Each region needs exactly 4 shaded cells.
3. The 4 shaded cells in each region must form one of the four tetrominoes: L, I, T, or S. Rotations and mirrors of the same shape count as the same piece.
4. If two regions share an edge, their tetrominoes must be different shapes. The game highlights matching neighbors in red.
5. All shaded cells must be 4-connected into one group. A disconnected island is a violation.
6. No 2x2 area can be fully shaded. The game highlights any 2x2 violation in red.

Controls

This game supports touch, keyboard, mouse input; the exact controls are explained inside the game.

Questions

What is LITS?

LITS (originally called Nuruomino) is a Japanese logic puzzle invented by Naoki Inaba. The grid is divided into regions, and you must shade one tetromino (L, I, T, or S) in each region, following four rules.

What are the four rules of LITS?

1) Each region must contain exactly one tetromino (4 shaded cells forming L, I, T, or S). 2) Tetrominoes in adjacent regions cannot be the same shape. 3) All shaded cells must form one connected group. 4) No 2x2 block can be fully shaded.

How many levels are there?

LITS Puzzle on GameZipper includes 30 hand-tuned levels across four tiers: 6x6, 8x8, 10x10, and 12x12 grids with 4, 6, 8, and 10 regions respectively.