This number of teams is perfect for small leagues, fantasy leagues, and tennis tournaments because it allows seeding. It's also easier to keep track of every match because of the neat manner it's carried out. This bracket caps at a 23-games max, with 11 games per side and 1 extra game in certain cases.

The maximum number of games in a double-elimination tournament is one less than twice the number of teams participating (e.g., 8 teams 15 games). The minimum number is two less than twice the number of teams (e.g., 8 teams 14 games).

To determine the number of matches use the formula, N=(cx2)-2. For example 17 participants/teams times 2 equals 34 minus 2 equals 32 matches. And there is a possibility there could be 33 matches if the loser bracket participant/team makes it to the final and beats the winner bracket participant/team twice.

This system offers up to 47 matches, that's why it's mostly recommended for events with short match duration. For example, they are often used in e-sports contests, mostly with fighting games, with matches that last 2 minutes or more. That would allow the tournament to be carried out in less than 2 hours.

With 20 participants, your bracket will have 190 matches to play.

So the typical 12-team brackets has four rounds of games that end with a single champion. Nothing crazy there, but to make the tournament move smoothly, the top four seeds will have first round byes. While the eight lower seeds will have to win their first round game to move onto the second round.

This system offers up to 47 matches, that's why it's mostly recommended for events with short match duration. For example, they are often used in e-sports contests, mostly with fighting games, with matches that last 2 minutes or more. That would allow the tournament to be carried out in less than 2 hours.

Continuing this process shows that for 16 teams, there are 8 + 4 + 2 + 1, or 15 total games. Using brackets can be done for any number of teams. For 64 teams, there are 63 games; for 32 teams, 31 games.