For any set $X$, let $[X]^2 = \big\{\{x,y\}: x\neq y \in X\big\}$.

Is there a finite, simple, undirected, connected graph $G=(V,E)$ with the following properties?

- There is $\{v, w\}\in [V]^2\setminus E$ such that collapsing $v,w$ increases the chromatic number, but
- for all $\{a, b\}\in [V]^2\setminus E$ we have $\chi((V,E)) = \chi((V, (E\cup\{a,b\})))$, that is, adding an edge connecting $a$ and $b$ does not increase the chromatic number.