Recent Posts

81

Requests / Re: 6 courts with 28 players

« Last post by Ian Wakeling on January 26, 2024, 03:36:23 AM »

How many rounds are you wanting to play?  Good choices would be 7, 14, 21,...  rounds as then everyone could have the same number of byes. For example 7 rounds with 4 byes per round, is 28 byes enough that everyone can have exactly one bye.

82

Requests / 6 courts with 28 players

« Last post by RayG195 on January 25, 2024, 03:47:38 PM »

Trying to get a schedule for 6 courts with 28 players for pickleball. I am good through 27 players, but then my current schedule bumps to 7 courts and we only have 6.

83

Requests / Re: badminton tournamount

« Last post by Ian Wakeling on January 23, 2024, 02:55:48 PM »

I had not seen plan2play before so I took a quick look, and I ended up with a schedule where one of the 20 players had 9 others players who they never played with either as partners or opponents.  It's possible to do a lot lot better and I offer the schedule below which gives you everything that you asked for except for the fact that players 15 & 19 oppose twice. 

(10  3 v  7 14)  ( 9 11 v  2  1)  (13 15 v  5 12)  ( 8  6 v  4 16)
(17  5 v 19  9)  ( 4 11 v  7 10)  (12  1 v  3  6)  ( 2 18 v 20  8)
( 7 20 v 17  6)  ( 8 14 v 19  1)  ( 4  5 v 16 18)  (15  3 v  2 13)
(16 12 v  9  2)  ( 1  3 v 18 17)  ( 4 19 v 15 11)  (14 10 v 20 13)
(10 12 v  8 18)  ( 9  6 v 14 19)  (20 11 v  5 15)  (17  7 v 16 13)
( 9  8 v 15  7)  (12 13 v  1  4)  ( 5  2 v 10  6)  ( 3 14 v 16 11)
(17 11 v  6 12)  ( 5 20 v  8  1)  (10  4 v  9  3)  ( 7 18 v 19  2)
(17  3 v  8  5)  (15 18 v 14  6)  (13 19 v  2 16)  ( 7  4 v 20  1)
(17  2 v  4 14)  (15  1 v 16 10)  ( 3 12 v 20 19)  ( 9 18 v 13 11)
(12 14 v  5  7)  (20 18 v  9 16)  (11  6 v 13  8)  (17 19 v 10 15)

The byes have a pattern to them 17,18,19,20 in round 1, 13,14,15,16 in round 2, etc..  Hope that helps.

84

Requests / Re: 2 teams of 5 players

« Last post by Ian Wakeling on January 23, 2024, 01:17:58 PM »

My guess is that this is impossible.  You could take the 10 player schedule in reply#3 here and rearrange the four players in each game so that it is two H players vs two W players.  This will give you some of what you want apart from the having one missing opposition player.

85

Requests / 2 teams of 5 players

« Last post by rowanklein on January 22, 2024, 06:17:00 PM »

Have a scenario where there are 2 teams of 5 players. 

Teams
HA, HB, HC, HD & HE
AA, AB, AC, AD & AE

Games are played in pairs from same team, against pair from other team.

Constraints.
- Play with each partner once (4 games each, 5 rounds including bye)
- Play against each opposition at least once, but not more than twice. 

Is there a soultion for this? 

86

Requests / Re: Round Robin - 8 Player Doubles

« Last post by tkam on January 22, 2024, 11:17:40 AM »

Perfect, thanks again, Ian.

If you could assist with one more query, I'm seeking a variant that mirrors the previous structure but includes a round where players on the same court are sequentially ranked.

To clarify, I'm looking for a round where the player ranks are on court as follows:

Court 1: 12, 11, 10, 9

Court 2: 8, 7, 6, 5

Court 3: 4, 3, 2, 1

The aim is to ensure that there's at least one round where two matches are played where all players are of comparable skill levels. To clarify, no requirement for 12 to partner with 11 vs 10 and 9, simply that the round consists of those sequential ranks, the game order can be any combo within the four.

I'm hoping that the the schedule as a whole can still give a decently low balance score, though i suspect 112 isn't possible, but hopefully something close?

Much appreciated!

87

Requests / badminton tournamount

« Last post by superwomble16 on January 21, 2024, 03:34:10 PM »

hi i want a rotating pairs badminton tournamount using 20 players . it will be played over 10 rounds using 4 courts per round 
and therefore 4 players will sit out per round . The individual player will sit out all exactly twice and hopefully spread out over
the 10 rounds .
i have found one such tournamount using plan2play but the variety of partners is limited .
i would like a player to only play once with any other player and not play against the same pair twice .
A variety of matches with each player playing with the most players as possible creating a good mixup would be ideal .
i have just come across this site and it looks perfect for mr needs,hopefully. 
any help would be much appreciated . 

88

Requests / Re: Round Robin - 8 Player Doubles

« Last post by Ian Wakeling on January 20, 2024, 09:01:59 AM »

I think I am seeing that the partner/opponent schedule that you start with matters here.  I can improve a little on your result, as the schedule below has a score of 112.

 8  6 10 12
 8 10  6 12
11  3  9  5
11  9  3  5
 7  2  4  1
 7  1  2  4
 6  2  1  5
 6  1  2  5
 4 10  9  3
 4  9 10  3
 7 12 11  8
 7 11  8 12
 2 11 12  3
 2 12 11  3
 8  1 10  9
 8  9  1 10
 7  4  6  5
 7  5  4  6
11  4  5 10
11  5  4 10
 6 12  9  1
 6  9 12  1
 7  8  2  3
 7  3  8  2
 4  8  3  1
 4  3  8  1
 2  5  9 12
 2  9  5 12
 7 10  6 11
 7  6 11 10

89

Requests / Re: Round Robin - 8 Player Doubles

« Last post by tkam on January 19, 2024, 04:09:50 AM »

Thanks again Ian.

Sorry to be pedantic, would it also be possible to get a skill balanced version of the 1st schedule you posted? It has a slightly more symmetric distribution than the latest one.

I had a crack at it myself and the lowest I could get was 116, grateful if you could check for anything better?

90

Requests / Re: Round Robin - 8 Player Doubles

« Last post by Ian Wakeling on January 18, 2024, 12:30:25 PM »

I believe the schedule below has the same partner/opponent properties as before but has a skill difference score of 104.

 6  8 12 10
 6 12  8 10
 9  3 11  1
 9 11  3  1
 5  2  4  7
 5  7  2  4
 8  2  7  1
 8  1  7  2
 4 12 11  3
 4 11 12  3
 5 10  9  6
 5  9  6 10
 2  9 10  3
 2 10  9  3
 6 12 11  7
 6 11  7 12
 5  1  4  8
 5  4  8  1
 9  1  4 12
 9  4  1 12
 8  7 11 10
 8 11 10  7
 5  3  6  2
 5  6  2  3
 4  3  6  7
 4  6  3  7
 2 11  1 10
 2  1 11 10
 5  8  9 12
 5 12  8  9

I am doing the same thing that you described, just swapping around the player numbers, but the starting point was a similar schedule to the one in my previous post (generated by the same algorithm).