Technically, the caller has to read out the pattern of the game before start, announcing the numbers. The pattern of the game varies from game to game and from place to place. The most common methods followed universally are Straight-line Bingo and Coverall. The Coverall pattern is typically of Jackpot nature. The objective is to mark every number of the card within a certain number of calls or announcements of the caller. The Straight-line counterpart has got an only five-number straight line which allows also free spaces. As per the nature the Coverall type becomes more thrilling and it is also called blackout, which means the player has been able to tick all the numbers of the card within a specific number of calls, mostly it is 49.
 
While playing bingo, a player is expected to focus highly on the caller as the tally between the numbers announced and printed on his cards can never be missed out. Why to take chances when a blackout can herald a new era in your life?