LITS Quad is a variant of LITS, in which the cells in a grid are split into either shaded or unshaded.
The objective is paint one each of the four connected cells in each shape, subject to the following rules:
- No two of the same tetrominos, including rotations / reflections are allowed to touch.
- All painted cells must connect upon completion.
- No 2x2 area of painted cells is allowed.
- Tetrominos within the same shape are not allowed to touch.
A standard 10x10 LITS Quad and its solution.