Here's a randomly filled in NCAA Men's Basketball Tournament bracket. If you don't like this one, press reload for another. It's currently set to use the initial pairings for the 2018 tournament. Each game is chosen randomly as follows: if the two teams involved are seeded 'x' and 'y', then Pupset = min(x,y) / (x+y). (See note.)
FINAL FOUR
=================
+-( 2)-Cincinnati---+
+-( 2)-Cincinnati---+
+-( 4)-Gonzaga------+ |
+-( 2)-Cincinnati---+
+-( 1)-Villanova----+ |
+-( 1)-Kansas-------+
+-( 1)-Kansas-------+
South Regional
=================
+-( 1)-Virginia-----+
+-( 1)-Virginia-----+
+-(16)-UMBC---------+ |
+-( 1)-Virginia-----+
+-( 8)-Creighton----+ | |
+-( 8)-Creighton----+ |
+-( 9)-Kansas St.---+ |
+-( 1)-Virginia-----+
+-( 5)-Kentucky-----+ | |
+-( 5)-Kentucky-----+ | |
+-(12)-Davidson-----+ | | |
+-( 5)-Kentucky-----+ |
+-( 4)-Arizona------+ | |
+-( 4)-Arizona------+ |
+-(13)-Buffalo------+ |
+-( 2)-Cincinnati---+
+-( 6)-Miama (Fla.)-+ |
+-(11)-Loyola-Chi.--+ |
+-(11)-Loyola-Chi.--+ | |
+-( 3)-Tennessee----+ |
+-( 3)-Tennessee----+ | | |
+-( 3)-Tennessee----+ | |
+-(14)-Wright St.---+ | |
+-( 2)-Cincinnati---+
+-( 7)-Nevada-------+ |
+-( 7)-Nevada-------+ |
+-(10)-Texas--------+ | |
+-( 2)-Cincinnati---+
+-( 2)-Cincinnati---+ |
+-( 2)-Cincinnati---+
+-(15)-Georgia St.--+
West Regional
=================
+-( 1)-Xavier-------+
+-( 1)-Xavier-------+
+-(16)-NCCU/TXSO----+ |
+-( 1)-Xavier-------+
+-( 8)-Missouri-----+ | |
+-( 9)-Florida St.--+ |
+-( 9)-Florida St.--+ |
+-( 4)-Gonzaga------+
+-( 5)-Ohio St.-----+ | |
+-(12)-S. Dak. St.--+ | |
+-(12)-S. Dak. St.--+ | | |
+-( 4)-Gonzaga------+ |
+-( 4)-Gonzaga------+ | |
+-( 4)-Gonzaga------+ |
+-(13)-UNC-Green.---+ |
+-( 4)-Gonzaga------+
+-( 6)-Houston------+ |
+-(11)-San Diego St.+ |
+-(11)-San Diego St.+ | |
+-( 3)-Michigan-----+ |
+-( 3)-Michigan-----+ | | |
+-( 3)-Michigan-----+ | |
+-(14)-Montana------+ | |
+-( 2)-N. Carolina--+
+-( 7)-Texas A&M----+ |
+-(10)-Providence---+ |
+-(10)-Providence---+ | |
+-( 2)-N. Carolina--+
+-( 2)-N. Carolina--+ |
+-( 2)-N. Carolina--+
+-(15)-Lipscomb-----+
East Regional
=================
+-( 1)-Villanova----+
+-( 1)-Villanova----+
+-(16)-LIU/RAD------+ |
+-( 1)-Villanova----+
+-( 8)-Va. Tech-----+ | |
+-( 8)-Va. Tech-----+ |
+-( 9)-Alabama------+ |
+-( 1)-Villanova----+
+-( 5)-W. Virginia--+ | |
+-(12)-Murray St.---+ | |
+-(12)-Murray St.---+ | | |
+-( 4)-Wichita St.--+ |
+-( 4)-Wichita St.--+ | |
+-( 4)-Wichita St.--+ |
+-(13)-Marshall-----+ |
+-( 1)-Villanova----+
+-( 6)-Florida------+ |
+-( 6)-Florida------+ |
+-(11)-STBON/UCLA---+ | |
+-( 6)-Florida------+ |
+-( 3)-Texas Tech---+ | | |
+-(14)-SF Austin----+ | |
+-(14)-SF Austin----+ | |
+-( 7)-Arkansas-----+
+-( 7)-Arkansas-----+ |
+-( 7)-Arkansas-----+ |
+-(10)-Butler-------+ | |
+-( 7)-Arkansas-----+
+-( 2)-Purdue-------+ |
+-( 2)-Purdue-------+
+-(15)-CSFullerton--+
Midwest Regional
=================
+-( 1)-Kansas-------+
+-( 1)-Kansas-------+
+-(16)-Penn---------+ |
+-( 1)-Kansas-------+
+-( 8)-Seton Hall---+ | |
+-( 8)-Seton Hall---+ |
+-( 9)-NC State-----+ |
+-( 1)-Kansas-------+
+-( 5)-Clemson------+ | |
+-(12)-New Mex. St.-+ | |
+-(12)-New Mex. St.-+ | | |
+-(13)-Charleston---+ |
+-( 4)-Auburn-------+ | |
+-(13)-Charleston---+ |
+-(13)-Charleston---+ |
+-( 1)-Kansas-------+
+-( 6)-TCU----------+ |
+-( 6)-TCU----------+ |
+-(11)-ASU/SYR------+ | |
+-( 6)-TCU----------+ |
+-( 3)-Michigan St.-+ | | |
+-(14)-Bucknell-----+ | |
+-(14)-Bucknell-----+ | |
+-( 6)-TCU----------+
+-( 7)-Rhode Island-+ |
+-(10)-Oklahoma-----+ |
+-(10)-Oklahoma-----+ | |
+-( 2)-Duke---------+
+-( 2)-Duke---------+ |
+-( 2)-Duke---------+
+-(15)-Iona---------+