Column 9 has 2 beads. Column 8 has 1 bead. Different depth → blue (≠).
- Column 10 starts, so use Rule 1: compare Column 9 with Column 8, 1 column further back.
- Column 9 has 2 beads. Column 8 has 1 bead. Different depth → blue (≠).
Common table reading watchout: Comparing the wrong columns. Compare Column 9, the one that just finished, with Column 8.