Why is the tournament pending?

The tournament is closed when the leaderboard is full of all players.

This time depends on the player's activity in the game. 

Sometimes, the tournament takes longer to be completed. For example, when a player submits a score and joins the leaderboard, they first need to wait for other players to submit their score, but most of our tournaments end in less than an hour.

In some rare cases, if a particular player stops his game and doesn't submit any score, the system will remove him from the leaderboard after 10 minutes and open his spot for a new player to join and play.