What's the difference between chess group A and chess group B?

The differences between chess group A and chess group B are as follows:

1, the comparison method is different: the first set of chess adopts the game of single defeat and elimination, and the first hand is selected by lottery to play chess. Chess Group B adopts 7 rounds of integral arrangement.

2. The order is different: Chess Group A is played after Group B, with 32 players promoted by Group B. Chess Group B has 12 players after the fifth round and 10 players after the sixth and seventh rounds, so advanced players are eligible to participate in Group A. ..