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Configuration #37

RSST-R-0037-COQ-2005discharging rule R4b

ring size 6

vertices 11 · edges 26

Free completion

edge 0–1edge 0–5edge 0–6edge 0–7edge 0–8edge 0–9edge 1–2edge 1–6edge 1–7edge 1–8edge 2–3edge 2–6edge 2–7edge 2–8edge 3–4edge 3–8edge 4–5edge 4–9edge 4–10edge 5–7edge 5–9edge 5–10edge 6–7edge 6–8edge 7–10edge 8–9vertex 0 · deg 6 · A·vermilion · ringvertex 1 · deg 5 · C·viridian · ringvertex 2 · deg 5 · A·vermilion · ringvertex 3 · deg 3 · C·viridian · ringvertex 4 · deg 4 · A·vermilion · ringvertex 5 · deg 5 · C·viridian · ringvertex 6 · deg 5 · D·indigovertex 7 · deg 6 · B·ochrevertex 8 · deg 6 · B·ochrevertex 9 · deg 4 · D·indigovertex 10 · deg 3 · D·indigo
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.