1. Go to Preferences> Layout (1)> Configure Fields
2. Find the virtual tag you created for album rating ("Album Score" in your case) and change its data type from "String" to "Number"
3. Define another virtual field "Album Range" using the following formula (note that this formula should use your own virtual tag label, "Album Score" in this case):
$If(<Album Score>=-1,"No Rating",$If(<Album Score>>10,$If(<Album Score>>20,$If(<Album Score>>30,$If(<Album Score>>40,$If(<Album Score>>50,$If(<Album Score>>60,$If(<Album Score>>70,$If(<Album Score>>80,$If(<Album Score>>90,91-100,81-90),71-80),61-70),51-60),41-50),31-40),21-30),11-20),0-10))
4. Add "Album Range" to column browser for grouping.