LITS Twin is a variant of LITS, in which the cells in a grid are split into either shaded or unshaded.


The objective is shade two sets of four connected cells in each shape, subject to the following rules:

  1. No two of the same tetrominos, including rotations / reflections are allowed to touch.
  2. All shaded cells must connect upon completion.
  3. No 2x2 area of shaded cells is allowed.
  4. Tetrominos within the same shape are not allowed to touch.


A standard 10x10 LITS Twin and its solution.

LITS Twin Example
LITS Twin Solution