Bingo card of Bingo a winning card may be the first person to complete row #3. Because the "N" column contains a free space, the maximum number of cards that guarantee a unique winner is (15*15*15*15) = 50,625. Because the players need to only focus on row #3, the remaining numbers in rows #1, #2, #4, and #5 are statistically insignificant for purposes of game play and can be selected in any manner as long as no number is duplicated on any card. Perhaps the most common pattern set, known as "Straight-line Bingo" is completing any of the five rows, columns, or
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