Software For League Pairings
- Thread starter dmgwalsh
- Start date
I write software of that nature, and could possibly accomodate it, for a fee of course.
PM me if you want to discuss details.
Thanks.
JWP
PM me if you want to discuss details.
Thanks.
JWP
At one point last year, I was toying with creating a pool-league-management website - where a league operator could buy an account and plug his/her various league stuff (not the real specific stuff, just general team-oriented stuff) in, and let it do the match schedules/etc.
From poring over existing schedules, I figured out a combo of a consistent pattern, combined with some random number generation, that worked pretty well. It also took into account travelling leagues - making sure that any team, from week to week, would be home/away/home/away etc. It was a bunch of code and not easily explained.
Quick and dirty manual method, though:
Start off 1-2, 3-4, 5-6, 7-8, 9-10 (10 being your bye).
For following weeks, just start randomly pairing up teams, while keeping track of and accomodating home/away status for the previous week (if your league is a travelling league - if not, don't worry about this at all), and ensuring that no two teams play each other twice.
Once you're done with setting up your 9th week (with ten teams, even though one is a bye), if you've got more weeks, take the first nine weeks (or however many of the first nine you need), dupe'em to the end, and reverse'em - i.e. 2-1, 4-3, 6-5, 8-7, 10-9 for the first week, etc. etc.
(Edit: Rereading the original post, I see it's individuals and not teams - just to be clear, it doesn't matter whether you deal with teams or individuals, the same principles apply.)
From poring over existing schedules, I figured out a combo of a consistent pattern, combined with some random number generation, that worked pretty well. It also took into account travelling leagues - making sure that any team, from week to week, would be home/away/home/away etc. It was a bunch of code and not easily explained.
Quick and dirty manual method, though:
Start off 1-2, 3-4, 5-6, 7-8, 9-10 (10 being your bye).
For following weeks, just start randomly pairing up teams, while keeping track of and accomodating home/away status for the previous week (if your league is a travelling league - if not, don't worry about this at all), and ensuring that no two teams play each other twice.
Once you're done with setting up your 9th week (with ten teams, even though one is a bye), if you've got more weeks, take the first nine weeks (or however many of the first nine you need), dupe'em to the end, and reverse'em - i.e. 2-1, 4-3, 6-5, 8-7, 10-9 for the first week, etc. etc.
(Edit: Rereading the original post, I see it's individuals and not teams - just to be clear, it doesn't matter whether you deal with teams or individuals, the same principles apply.)
thanks to all who replied. I also got this email which lays it out rather easily:
This example is for 12 teams. You can do the same process if you have fewer teams.
Add a bye to keep the numbers even. If you have a bye, you can put them it any location.
1 2 3 4 5 6 week 1 home
12 11 10 9 8 7 away
Teams 1 and 12 play against each other, as do 2 and 11, 3 and 10, etc.
1 3 4 5 6 7 week 2 away
2 12 11 10 9 8 home
Keep 1 in the same place. Move 2 down and shift the others.
1 4 5 6 7 8 week 3 home
3 2 12 11 10 9 away
Keep it going until 12 is where 2 started. This is the first half.
Make a copy of the half, but change all homes to aways and aways to homes.
This is the second half.
__________________
Mark Avlon
BCA Certified Instructor
National Senior Referee, BCA Pool League
League Operator, Sno-King BCA Pool League
This example is for 12 teams. You can do the same process if you have fewer teams.
Add a bye to keep the numbers even. If you have a bye, you can put them it any location.
1 2 3 4 5 6 week 1 home
12 11 10 9 8 7 away
Teams 1 and 12 play against each other, as do 2 and 11, 3 and 10, etc.
1 3 4 5 6 7 week 2 away
2 12 11 10 9 8 home
Keep 1 in the same place. Move 2 down and shift the others.
1 4 5 6 7 8 week 3 home
3 2 12 11 10 9 away
Keep it going until 12 is where 2 started. This is the first half.
Make a copy of the half, but change all homes to aways and aways to homes.
This is the second half.
__________________
Mark Avlon
BCA Certified Instructor
National Senior Referee, BCA Pool League
League Operator, Sno-King BCA Pool League
DMG,
Is your league for single players, or for teams?
Our league has 18 players. It is round robin, where you play every other player once (no computer needed). Halfway through the season there is an extra week for "position round", where you play the person next to you in the standings (#1 plays #2, #3 plays #4, etc.). There is another "position round" the last week of the season - a total of 19 matches for each player (you play each of the 17 other players once, plus your 2 position round matches - you could conceivably play another player a maximum of 3 times in the season).
This format encourages participation, make-up matches are allowed at any time (as long as they are made-up before the next position round). Standings are by won/loss record with cumulative total balls made as the tie-breaker.
Let us know what you decide.
Is your league for single players, or for teams?
Our league has 18 players. It is round robin, where you play every other player once (no computer needed). Halfway through the season there is an extra week for "position round", where you play the person next to you in the standings (#1 plays #2, #3 plays #4, etc.). There is another "position round" the last week of the season - a total of 19 matches for each player (you play each of the 17 other players once, plus your 2 position round matches - you could conceivably play another player a maximum of 3 times in the season).
This format encourages participation, make-up matches are allowed at any time (as long as they are made-up before the next position round). Standings are by won/loss record with cumulative total balls made as the tie-breaker.
Let us know what you decide.
I have my Straight Pool League at www.hobokenstraightpool.com I used the method described above to create the fixtures. I did it by hand this season, but I'm currently writing the algorithm to automatically generate the fixtures ready for season 2, and write them directly to the database.
When the season is over, I'm going to study all the results and create my own algorithm to calculate handicaps. Currently I know most of players so I can judge it but I'm probably setting up three more Leagues this season using the same software and need it to be automated.
I also enter all scores on my Treo 650 at the Pool Hall as soon as a match is completed, and the website is instantly updated.
PM me if you are setting up a League in the North East, and perhaps I can house all your stats, create a webpage, and have intra-league playoffs for big prizes. The more pooled players, the bigger the first prize (mine is well over $1000 for just one league).
When the season is over, I'm going to study all the results and create my own algorithm to calculate handicaps. Currently I know most of players so I can judge it but I'm probably setting up three more Leagues this season using the same software and need it to be automated.
I also enter all scores on my Treo 650 at the Pool Hall as soon as a match is completed, and the website is instantly updated.
PM me if you are setting up a League in the North East, and perhaps I can house all your stats, create a webpage, and have intra-league playoffs for big prizes. The more pooled players, the bigger the first prize (mine is well over $1000 for just one league).
Round robin format
Go to the BCAPL site - www.playbca.com.
Go to round robin format and you'll find from 4 through 26 or so.
There are also flow charts.
mark griffin
Go to the BCAPL site - www.playbca.com.
Go to round robin format and you'll find from 4 through 26 or so.
There are also flow charts.
mark griffin