Patches #151 Solving Notes
First read: Patches #151 starts with 16 clue cells on an 8×8 board. Begin with the fixed clues at r1 c3, r1 c4, r1 c8 instead of guessing color groups from empty space. Those clue cells are the safest anchors because every solved region must keep exactly one clue area and still cover the whole board.
Main anchor: The best anchor is the horizontal rectangle clue at r2 c6, not a random corner. This clue is useful because a strict shape has less room to wiggle than an open patch. After reveal, check it against Region 4, which should form the 2×3 rectangle from r1 c5 to r2 c7.