Patches #156 Solving Notes
First read: Patches #156 starts with 8 clue cells on a 7×7 board. Begin with the fixed clues at r3 c5, r3 c6, r4 c2 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 vertical rectangle clue at r4 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 6, which should form the 4×2 rectangle from r4 c6 to r7 c7.