LITS Solver

LITS Puzzle Rules Reminder:

• Each region (outlined area) must contain exactly 4 shaded cells.
• Shaded cells in each region must form a tetromino (L, I, T, S shape - rotations/reflections allowed).
• All shaded cells must be connected edge-to-edge.
• No 2x2 group of cells can be entirely shaded.
• Adjacent regions cannot contain the same tetromino shape (rotations/reflections count as the same shape).

Note: The regions are predefined for this puzzle. Ensure the `puzzleRegions` variable accurately reflects your puzzle layout.