How do Chess.com daily tournaments work?
Chess.com uses the popular Round-Robin format for chess tournaments. In round-robin tournaments each player plays every other player in two games (once as white, once as black). An example of a small round-robin is shown below.
|1. Player 1 (1200)||X||½ - 1||1 -½||1 -1||5||11.5|
|2. Player 2 (1200)||0 -½||X||0 - 1||1 - ½||3||7.5|
|3. Player 3 (1200)||½ - 0||0 - 1||X||0 -½||2||6.5|
|4. Player 4 (1200)||0 - 0||½ - 0||½ - 1||X||2||4.5|
Round-robin is very effective because each player plays every other player and then the winner is determined by the score. However, in most tournaments there are too many players to have single round, and a knock-out format is used.
In a knock-out the players are put into smaller groups (usually around six players per group) and then the winner(s) of that group are combined with winners of other groups to form a new group. The winner(s) of the final group are the winner(s) of the entire tournament.
The number of players that advance is selected by the Tournament Director at the start of the tournament. It might be that only one player from each group advances, or it might be more.
keywords: tournament organization model swiss round robin pairings style