Dec 28, 2006

Nuruomino (aka LITS)

[from Wikipedia]

  1. Shade a tetromino on each area, such that:
  2. Every pair of orthogonally adjacent tetrominoes are not equal (considering rotations and reflections),
  3. The shaded cells are all orthogonally contiguous and contain no 2×2 square tetrominoes as subsets.
Solution:

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