Robertson 4
This is the Robertson 4 sett — one scale-free proportion (r28g2r5g2r28g2r5g2r28db3r3g24r3db24r3db3r28g2r5g2r28db3r3g24r3db24r3db3), colour order pattern
BRBRGRBRGRGRBRBRGRBRGRGRGRGR. It is recorded as a single variant, below.
First attested ~2016.
| Scale | Variant | Earliest | |
|---|---|---|---|
| ×2 | Robertson 4 ★ | ~2016 |  |