Example, for clarity (this assumes the B10 adds Missouri and Kansas):
UMD
RUT
PSU
OSU
UM
MSU
IU
PU
MIN
WIS
NW
ILL
IOWA
UNL
KU
MIZ
So say I'm Ohio State....my 9 conference games per year are:
2018
Maryland, @Rutgers, Penn St, @Michigan, Indiana, @Minnesota, Northwestern, @Iowa, Kansas
2019
@Maryland, Rutgers, @Penn St, MSU, @Purdue, Wisconsin,@ Illinois, Nebraska, @Missouri
2020
Maryland, @Rutgers, Penn St, Michigan, @Indiana, Minnesota, @Northwestern, Iowa, @Kansas
2021
@Maryland, Rutgers, @Penn St, @MSU, Purdue, @Wisconsin, Illinois, @Nebraska, Missouri
I chose my preferred method, of not having the home-and-homes on consecutive years. This way, each recruiting class gets to play everyone else every 2 years, and will play everyone home and away in their 4 years.