Column 7 has 4 beads. Column 6 has 1 bead. Different depth → blue (≠).
- Column 8 starts, so use Rule 1: compare Column 7 with Column 6, 1 column further back.
- Column 7 has 4 beads. Column 6 has 1 bead. Different depth → blue (≠).
Common table reading watchout: Comparing the wrong columns. Compare Column 7, the one that just finished, with Column 6.