Wednesday, 5 November 2014

Barrier LITS Instructions

Rules: The challenge is to shade four connected cells in each region, 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. No tetromino is allowed to cross an internal wall.

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