How are Swiss pairing made?

Tourney Grounds: Doomtown handles Swiss rounds by calculating a weight for each possible pairing, and then selecting the set of pairings with the least total weight. The weights of the pairings are calculated to mimic the behavior of pairing the top players first and going down through the ranks.

For the computationally interested here is the full algorithm used:

1. Divide all players into groups with the same number of points.
2. Assign a point group index of 1 to all players in the first group, 2 to all players in the second group, and so on.
3. For each pair of players in the tournament that have not yet played each other, calculate a weight that tells us how good or bad that pairing is. A low weight means it is a good pairing, and a high weight means it is a bad pairing.
4. Set the initial weight to be equal to the difference between the players' point group indices.
5. Multiply the weight by 10 to the power of the highest point group index among the two players. We do this to prioritize good pairings among the top players. (Mimicing how the rules tell us to start by pairing the top players.)
6. Multiply the weight by 100 to make sure that the next modifications will not affect the pairings unless all else being equal.
7. Add weights to enforce tournament specific options. Such as the preferences to not pair two players from the same team.
8. Finally add a small random amount to the weight to be the last deciding factor.
9. Select the set of pairings that includes all players exactly once and has the lowest total weight.

Keep in mind that the pairings suggested by Tourney Grounds: Doomtown can always be changed manually by the Tournament Organizer.

What are Tourney Points?

Tourney Points are used by Tourney Grounds: Doomtown to reward excellent performances in tournaments. Depending on the number of players in a tournament the top finishers will be given a number of Tourney Points according to the table below.

The reward distribution follows the structure of a single elimination cut: the winner receives the first score, the runner-up receives the second score, the third and fourth places receive the third score, the fifth to eight places receive the fourth score, and so on.

Note that Tourney Points are not intended to compare or measure player strength or skill, they are just points that represent excellent tournament results. That being said, players with many Tourney Points are no doubt very good at Doomtown!

What are the patron rewards?

The patrons of Tourney Grounds: Doomtown keep the site up and running by pledging small monthly payments to our Patreon page. For this generosity they receive the following perks on Tourney Grounds: Doomtown:

• $1 patrons:
  • Permanently recognized as patrons by the icon on their player profile.
  • Unlocks a permanent patron achievement.
  • Unlocks an additional patron-tier specific achievement.
• $2 patrons:
  • Enables you to select up to two achievements for your player title.
  • Unlocks a patron-tier specific achievement.
• $5 patrons:
  • Enables you to select up to three achievements for your player title.
  • Enables you to boost tournaments that you organize with up to three additional achievement slots every 30 day interval.
  • Unlocks a patron-tier specific achievement.
• $10 patrons:
  • Enables you to boost tournaments that you organize with up to ten additional achievement slots every 30 day interval.
  • Unlocks a patron-tier specific achievement.