This bead is at Row 5. Column 3 has a bead at Row 5 too → red (=).
- Column 6 goes down to Row 5, so use Rule 2: look 3 columns back, at Column 3.
- Column 3 has a bead at Row 5 too → red (=).
Common table reading watchout: Thinking "no bead at this row" means blue. It is blue only when Column 3 stopped exactly one row above this bead.