Bingo card culture. Larger patterns, e.g. a diamond pattern consisting of cell positions B3, I2 and I4, N1 and N5, G2 and G4, and O3, are often used by online Bingo games to permit large number of players while ensuring only one player can win. (A unique winner is further desirable for online play where network delays and other communication interference can unfairly affect multiple winning cards. The winner would be determined by the first person to click the "Bingo!" button (emulating the shout of "Bingo!" during a live game).) In this case the number of unique winning cards is calculated as
National Bingo Game of 6 tickets in the evening. In February 2014 the Prize structure of the National Bingo Game was revised and formally launched in March. Zone Prizes were removed and a program of ad-hoc prizes and promotions introduced, in addition to a progressive Jackpot Prize rising to £250,000. The special prizes and promotions vary throughout the year and include luxury cruises, additional cash and travel, while the Jackpot remains a constant prize available to be won on every National Bingo Game throughout the year, with the value of the prize varying dependent upon how many tickets have been sold and when