#469 - LITS
Shade one tetromino of cells in each region so that all shaded cells form one orthogonally connected area. Two tetrominoes of the same shape may not share a bold border, counting rotations and reflections as the same. No 2x2 region may be entirely shaded.
05:39 here. Interesting one - the outsides were quite logical for me, and the middle was more of an intuitive approach.
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