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
=================
+-( 1)-Virginia-----+
+-( 1)-Virginia-----+
+-( 6)-Houston------+ |
+-( 4)-Auburn-------+
+-(11)-STBON/UCLA---+ |
+-( 4)-Auburn-------+
+-( 4)-Auburn-------+
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-----+ | | |
+-( 4)-Arizona------+ |
+-( 4)-Arizona------+ | |
+-( 4)-Arizona------+ |
+-(13)-Buffalo------+ |
+-( 1)-Virginia-----+
+-( 6)-Miama (Fla.)-+ |
+-( 6)-Miama (Fla.)-+ |
+-(11)-Loyola-Chi.--+ | |
+-( 3)-Tennessee----+ |
+-( 3)-Tennessee----+ | | |
+-( 3)-Tennessee----+ | |
+-(14)-Wright St.---+ | |
+-( 7)-Nevada-------+
+-( 7)-Nevada-------+ |
+-( 7)-Nevada-------+ |
+-(10)-Texas--------+ | |
+-( 7)-Nevada-------+
+-( 2)-Cincinnati---+ |
+-( 2)-Cincinnati---+
+-(15)-Georgia St.--+
West Regional
=================
+-( 1)-Xavier-------+
+-(16)-NCCU/TXSO----+
+-(16)-NCCU/TXSO----+ |
+-( 9)-Florida St.--+
+-( 8)-Missouri-----+ | |
+-( 9)-Florida St.--+ |
+-( 9)-Florida St.--+ |
+-(12)-S. Dak. St.--+
+-( 5)-Ohio St.-----+ | |
+-(12)-S. Dak. St.--+ | |
+-(12)-S. Dak. St.--+ | | |
+-(12)-S. Dak. St.--+ |
+-( 4)-Gonzaga------+ | |
+-( 4)-Gonzaga------+ |
+-(13)-UNC-Green.---+ |
+-( 6)-Houston------+
+-( 6)-Houston------+ |
+-( 6)-Houston------+ |
+-(11)-San Diego St.+ | |
+-( 6)-Houston------+ |
+-( 3)-Michigan-----+ | | |
+-( 3)-Michigan-----+ | |
+-(14)-Montana------+ | |
+-( 6)-Houston------+
+-( 7)-Texas A&M----+ |
+-( 7)-Texas A&M----+ |
+-(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-----+ | |
+-( 9)-Alabama------+ |
+-( 9)-Alabama------+ |
+-( 4)-Wichita St.--+
+-( 5)-W. Virginia--+ | |
+-( 5)-W. Virginia--+ | |
+-(12)-Murray St.---+ | | |
+-( 4)-Wichita St.--+ |
+-( 4)-Wichita St.--+ | |
+-( 4)-Wichita St.--+ |
+-(13)-Marshall-----+ |
+-(11)-STBON/UCLA---+
+-( 6)-Florida------+ |
+-(11)-STBON/UCLA---+ |
+-(11)-STBON/UCLA---+ | |
+-(11)-STBON/UCLA---+ |
+-( 3)-Texas Tech---+ | | |
+-( 3)-Texas Tech---+ | |
+-(14)-SF Austin----+ | |
+-(11)-STBON/UCLA---+
+-( 7)-Arkansas-----+ |
+-( 7)-Arkansas-----+ |
+-(10)-Butler-------+ | |
+-( 2)-Purdue-------+
+-( 2)-Purdue-------+ |
+-( 2)-Purdue-------+
+-(15)-CSFullerton--+
Midwest Regional
=================
+-( 1)-Kansas-------+
+-( 1)-Kansas-------+
+-(16)-Penn---------+ |
+-( 9)-NC State-----+
+-( 8)-Seton Hall---+ | |
+-( 9)-NC State-----+ |
+-( 9)-NC State-----+ |
+-( 4)-Auburn-------+
+-( 5)-Clemson------+ | |
+-(12)-New Mex. St.-+ | |
+-(12)-New Mex. St.-+ | | |
+-( 4)-Auburn-------+ |
+-( 4)-Auburn-------+ | |
+-( 4)-Auburn-------+ |
+-(13)-Charleston---+ |
+-( 4)-Auburn-------+
+-( 6)-TCU----------+ |
+-( 6)-TCU----------+ |
+-(11)-ASU/SYR------+ | |
+-( 3)-Michigan St.-+ |
+-( 3)-Michigan St.-+ | | |
+-( 3)-Michigan St.-+ | |
+-(14)-Bucknell-----+ | |
+-( 3)-Michigan St.-+
+-( 7)-Rhode Island-+ |
+-(10)-Oklahoma-----+ |
+-(10)-Oklahoma-----+ | |
+-(10)-Oklahoma-----+
+-( 2)-Duke---------+ |
+-(15)-Iona---------+
+-(15)-Iona---------+