How is seeding and group placement determined in multi-group tournaments?

For multi-group tournaments, players are placed into groups starting with the highest rated player sequentially down to the lowest rated player. For example, in a 25-player tournament with 5 groups and 5 players in each group, the top rated player goes into Group #1, 2nd highest rated player into Group #2, 3rd highest rated player into Group #3, and so on. After all groups have one player, it starts all over again at Group #1. So, in this example Group #1 would have the following seeds: #1, #6, #11, #16, and #21. This is done to try and ensure that in the final round, the best players will be left playing for the tournament win.
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