Column 5 has 4 beads. Column 3 has 2 beads. Different depth → blue (≠).
- Column 6 starts, so use Rule 1: compare Column 5 with Column 3, 2 columns further back.
- Column 5 has 4 beads. Column 3 has 2 beads. Different depth → blue (≠).
Common table reading watchout: Comparing the wrong columns. Compare Column 5, the one that just finished, with Column 3.