Patches #159 Full Analysis
First read: Patches #159 starts with 10 clue cells on an 8×8 board. Begin with the fixed clues at r1 c3, r2 c7, r3 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 strongest number anchor is the 12-cell clue at r6 c4. Large regions usually have fewer safe placements, so this clue is a better first test than a tiny patch. After reveal, check it against Region 7, which should form the 3×4 rectangle from r4 c3 to r6 c6.