Newbe

[Morti]

 I would like some assistance on creating a schedule of play.  We have 18 teams and would like to create a schedule where every team plays each other once before we start the rotation over in 6 weeks.  We don't need to end the season with every team playing each other an equal number of times, but as close as possible.  How do I go about creating a schedule?
 We have six pits to use.
I forgot to mention that it is important that the teams rotate on the pits that they use for each game.  What I mean is that one team can't throw on the same court all the time.  Each court is a bit different from the next due to lighting, neighboring courts, wind, rain, etc. so we want to level the playing field as much as possible.

[Ian Wakeling]

It's not clear to me how the rounds should be arranged, so would you give more details please?  With 18 teams there are 153 possible pairs of 2 teams, and therefore 153 matches to play, so I think you are asking for 26 rounds (1 round would be short with only 3 pits, since 153 = 25*6 + 3).  But if there are 6 weeks in the schedule, how are these rounds arranged in time, is it one round per day, or do you have multiple rounds on the same day?  Thanks, Ian.

[Morti]

Thanks Ian.
  For this year we are only 16 teams with the 6 pits available.
  We usually like to play 5 to 6 games each Monday night.
  Again rotating through the pits available soo as no team plays on the same pit for every match. 

[Ian Wakeling]

Here is a schedule for 16 teams A to P playing 5 rounds per night for 4 weeks.  Each team has either 3 or 4 games per night and plays either 2 or 3 times at each pit (the 6 columns).


(C E) (B K) (H P) (M O) (I L) (A D)
(K O) (D L) (A F) (G I) (J N) (B C)
(A L) (H I) (C F) (G P) (B N) (E M)
(I K) (O P) (H N) (D J) (E F) (G L)
(D F) (G H) (B J) (A E) (K M) (C P)
------------------------------------
(G J) (C L) (B O) (E N) (A I) (M P)
(D N) (F M) (G K) (H L) (C J) (B I)
(F N) (E P) (I O) (A M) (D K) (C H)
(K P) (D G) (L M) (B H) (E O) (F J)
(N P) (C O) (E G) (K L) (A H) (I J)
------------------------------------
(B M) (A K) (E L) (F I) (D P) (N O)
(E H) (J M) (K N) (C G) (B L) (D O)
(F G) (A B) (D M) (C K) (H J) (I P)
(L P) (E I) (F H) (M N) (A O) (J K)
(B E) (D H) (J O) (A C) (F P) (G N)
------------------------------------
(H O) (B F) (J L) (D I) (C M) (A G)
(H M) (A N) (D E) (B P) (F K) (L O)
(C D) (J P) (I N) (F O) (G M) (E K)
(A J) (G O) (C I) (B D) (L N) (H K)
(I M) (C N) (A P) (E J) (B G) (F L)