Blackout bingo, also commonly known as "Coverall Bingo," is one of the most popular types of bingo patterns. Many sites use this pattern for their jackpot games, because it is the most difficult pattern to get and therefore makes the game longer and more exciting for everyone.
Three examples of Blackout/Coverall patterns in both 75, 80 and 90 ball bingo.
In 75-ball blackout bingo you have to cover all 25 spots on your bingo card. It takes at least 24 calls to cover them all, since you get the middle spot for free. Make sure to pay close attention to the Bingo Caller to make sure you don't miss any of the numbers called!
It may take a minimum of 24 calls to get a blackout bingo, but if you happened to get one in fewer than even 40 calls you would be considered a very lucky person. Most blackout bingo games end on the 55th - 60th call, depending on how many players are in the game.
As for 80 ball bingo, all 16 squares must be covered for a blackout bingo, and in 90 ball bingo a Full House (with all 27 squares marked off) is considered a coverall or blackout bingo.