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In snooker, a century break (sometimes referred to as a ton) is a score of 100 points or more within one at the table without missing a shot, and requires potting of at least 24 consecutive balls. The ability to score century is regarded as a mark of the highest skill in snooker, while first career century has been described by Ronnie O'Sullivan as the "ultimate milestone for any snooker player".〔 Over 20,000 century frames have been recorded by snooker players throughout professional tournaments. In 2014, Neil Robertson became the first person to have scored over 100 century frames throughout a single season, threshold that only some 50 other players had surpassed throughout their entire careers. Ronnie O'Sullivan is the "leading centurion"〔 as he holds the record for most career centuries, with almost 800 century breaks. == Rules == A century is a score of 100 points or more within one at the table, without missing a shot. The player does this by potting and alternately, and when no reds are left, potting the coloured balls in order of their increasing value. Because a break is defined as series of consecutive by a player during a single , scoring 100 points over the course of a whole frame does not necessary constitute a century break, as it must be done on a single turn at the table. Points for a foul shot by the opponent do not count in a player's break. Under normal circumstances, the highest possible century in snooker is 147 (a "maximum break"), composed of 15 reds (one point each), 15 blacks (seven points each) and the six remaining colours; yellow, green, brown, blue, pink and black potted consecutively (two though seven points each for a total of 27). If for example only the least-valued colour (yellow, two points) would be used instead of the black ball, the break value would only be 54 points. This means that only a single century break is possible in a of snooker under a limited number of combinations, but it requires the potting at least 24 consecutive balls.〔 To score one, there must be at least ten reds on the table when the player comes to play since if there are only nine reds left, only 99 (= 9 × (1 + 7) + 27) points may be scored. An exception exists if the opponent and leaves the incoming player on all the remaining reds. In such a situation, the player can nominate one of the other as a red, known as a "", which carries the same value as a red for just that shot, and therefore, a century break is still possible with only nine reds left. As of February 2015, a maximum break has been officially achieved only 114 times in professional competitions. Breaks above 147 are possible (up to 155) when an opponent fouls and leaves a with all fifteen reds still remaining on the table. This has happened only once in professional competition, when Jamie Burnett made a 148 at the qualifying stage of the 2004 UK Championship. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「century break」の詳細全文を読む スポンサード リンク
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