Tomorrow, the NBA play in games begin with with a double header set of games with the Hornets/Pacers and Celtics/Wizards, but a lot of NBA fans are not really up to date with how this tournament actually works. So, here’s everything you need to know.

Put simply, the tournament involves the 7th, 8th, 9th, and 10th seeded teams in each conference. In each conference, there will be 3 games that work as follows:

Game 1: The first game involves the 7/8 seeds. Of these two, the team with the highest winning percentage gets home court advantage. Whoever wins this games earns the official 7th seed in their respective conference playoffs. The loser gets another chance in the 3rd game.

Game 2: Here, the 9th seed will host the 10th seed. The loser of this game is automatically eliminated, while the winner moves on to game 3 to play the loser of game 1.

Game 3: In this game, the loser of game 1 plays the winner of game 2. The winner of this matchup brings home the 8th seed of their conference playoffs.

Now, to put things into context for this year’s play in games, here’s what it will look like:

(Game 3 is determined by the losers of game 1 and winner of game 2)

Game 1’s:

Washington Wizards @ Boston Celtics: 5/18 9pm EST

Golden State Warriors @ LA Lakers: 5/19 10pm EST

Game 2’s:

Charlotte Hornets @ Indiana Pacers: 5/18 6:30pm EST

San Antonio Spurs @ Memphis Grizzlies: 5/19 7:30pm EST

(Game 3 is determined by the losers of game 1 and winner of game 2)