Round Robin Tournament Scheduling

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Title: Beer Olympics
Post by: Beerolypmics on August 04, 2020, 09:33:09 PM
Hosting a Beer Olympics, unsure of how many teams will show up. Looking for a schedule for 17 and 18 teams playing 7 or 8 events (whatever works best). Also ok with having buys if that is necessary. Thanks.
Title: Re: Beer Olympics
Post by: Ian Wakeling on August 06, 2020, 03:32:23 AM
In this situation having an odd number of teams is a bad idea, as it is impossible to give everyone the same number of games.  Here I am assuming that you would like every team to play all events exactly once,  in which case these are the best two schedules to consider:

16 teams (A to P), 8 events and 8 rounds
 E1    E2    E3    E4    E5    E6    E7    E8
(O H) (G N) (A D) (E M) (K L) (J F) (P C) (B I)
(P L) (K C) (J I) (B F) (G H) (A M) (O N) (E D)
(G D) (O M) (E H) (A N) (P I) (B C) (K F) (J L)
(A C) (E L) (O F) (G I) (B N) (P D) (J H) (K M)
(J N) (B H) (P M) (K D) (E C) (O I) (A L) (G F)
(K I) (P F) (B L) (J C) (O D) (E N) (G M) (A H)
(B M) (J D) (K N) (P H) (A F) (G L) (E I) (O C)
(E F) (A I) (G C) (O L) (J M) (K H) (B D) (P N)

18 teams (A to R), 8 events and 9 rounds
 E1    E2    E3    E4    E5    E6    E7    E8    bye 
(B E) (L R) (P I) (Q H) (D A) (F J) (C K) (O N) (G M)
(O H) (Q E) (G J) (D N) (F I) (C M) (B R) (P A) (L K)
(G A) (F N) (Q K) (C I) (B M) (O R) (P H) (L J) (D E)
(D M) (O J) (C H) (P K) (G E) (L N) (Q I) (F R) (B A)
(Q J) (B I) (F E) (O M) (P R) (G H) (L A) (D K) (C N)
(C R) (G K) (O A) (L E) (Q N) (D I) (F M) (B H) (P J)
(P N) (D H) (L M) (F A) (C J) (B K) (O E) (G I) (Q R)
(L I) (C A) (D R) (B J) (O K) (P E) (G N) (Q M) (F H)
(F K) (P M) (B N) (G R) (L H) (Q A) (D J) (C E) (O I)