Round Robin Tournament Scheduling

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Title: 10 team round robin draw with 2 teams having a bye
Post by: Jace75 on May 25, 2014, 10:49:42 PM

I am changing my round robin from a basic 9 team each play twice, to a 10 team with 2 byes a round draw I can't come up with a fair draw?
The format with 2 divisions and you play teams in your division twice and the other division once works well for our season length.
Any ideas on what sort of draw to use would be great

Title: Re: 10 team round robin draw with 2 teams having a
Post by: Ian Wakeling on May 26, 2014, 07:12:08 AM

If you use v5.1 of the Excel generator, then you can easily make two Double Round Robins for 5 teams, and  these are all the within-division games, that would give 10 rounds of play with one bye in each division per round.   Then you could add extra rounds of between-division games taken from the schedule below.

(A4 B3) (A5 B4) (A3 B1) (A2 B2) (A1 B5)
(A5 B2) (A3 B3) (A1 B4) (A4 B5) (A2 B1)
(A1 B1) (A2 B5) (A4 B2) (A3 B4) (A5 B3)
(A2 B4) (A4 B1) (A5 B5) (A1 B3) (A3 B2)
(A3 B5) (A1 B2) (A2 B3) (A5 B1) (A4 B4)

Either you play the between division games as five rounds of 5 games, as above, or if you want byes, then you could convert the last column above, into 1 round of 4 games and another round with a single game.

Hope that helps.

Title: Re: 10 team round robin draw with 2 teams having a
Post by: Jace75 on May 26, 2014, 11:29:06 PM

Thanks Ian this will work perfectly.
Only one other would it be possible to play a season where everyone plays each other twice with 2 byes.
Jason

Title: Re: 10 team round robin draw with 2 teams having a
Post by: Ian Wakeling on May 27, 2014, 02:21:17 AM

Jason,

You could try the following if you wanted everyone playing each other twice.  The number of games is not divisible by four so there needs to be two rounds with 4 byes.

Ian

(E I) (A F) (D H) (---)
(B G) (C J) (A D) (---)
(F H) (C I) (A E) (G J)
(D J) (E F) (C G) (B H)
(G H) (A I) (F J) (B E)
(I J) (A G) (C E) (D F)
(B C) (E H) (A J) (D G)
(C H) (D E) (B J) (F I)
(D I) (B F) (E G) (A C)
(G I) (H J) (B D) (A E)
(A H) (B I) (E J) (C F)
(A B) (C D) (H I) (F G)
(B F) (G H) (E I) (C J)
(C G) (D F) (A H) (B E)
(C E) (G I) (A F) (H J)
(F J) (B I) (C D) (E H)
(A B) (F H) (D G) (C I)
(E F) (B D) (H I) (A J)
(I J) (A C) (F G) (D H)
(C H) (E G) (B J) (D I)
(A D) (E J) (C F) (B G)
(D E) (G J) (B H) (A I)
(A G) (D J) (F I) (B C)