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Configuration #7

RSST-R-0007-COQ-2005discharging rule R6

ring size 12

vertices 17 · edges 30

Free completion

edge 0–1edge 0–11edge 0–12edge 0–15edge 1–2edge 1–12edge 1–15edge 2–3edge 3–4edge 3–14edge 4–5edge 4–14edge 5–6edge 5–14edge 6–7edge 6–16edge 7–8edge 7–16edge 8–9edge 8–13edge 8–16edge 9–10edge 9–13edge 10–11edge 11–12edge 11–15edge 12–13edge 12–14edge 14–15edge 15–16vertex 0 · deg 4 · B·ochre · ringvertex 1 · deg 4 · C·viridian · ringvertex 2 · deg 2 · A·vermilion · ringvertex 3 · deg 3 · C·viridian · ringvertex 4 · deg 3 · A·vermilion · ringvertex 5 · deg 3 · C·viridian · ringvertex 6 · deg 3 · A·vermilion · ringvertex 7 · deg 3 · C·viridian · ringvertex 8 · deg 4 · A·vermilion · ringvertex 9 · deg 3 · B·ochre · ringvertex 10 · deg 2 · A·vermilion · ringvertex 11 · deg 4 · C·viridian · ringvertex 12 · deg 5 · A·vermilionvertex 13 · deg 3 · C·viridianvertex 14 · deg 5 · B·ochrevertex 15 · deg 5 · A·vermilionvertex 16 · deg 4 · B·ochre
100%

Outer cycle (bold ring) is the configuration's boundary; interior vertices form the reducible piece. A configuration is D-reducible when every 4-coloring of its ring either extends to the interior or can be Kempe-modified into one that does.