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围棋自有缓三气劫无忧的说法,但对局中偶尔会出现缓四气劫输棋的局面。2000年,“黑棋士”金承俊七段(当时)和“李世石克星”赵汉乘四段在韩国最大棋战——第5期LG精油杯本赛第一轮对局中出现了以上局面。 在这里,首先向中级棋迷普及缓气劫和劫材的公式:单劫只需多一个劫材就可以赢,但是打缓一气劫必须多3个劫材。因为利用一个劫材回提时,对方可以消掉一个劫材。按这个公式缓二气劫需要多5个劫材,缓三气劫需要多7个劫材,缓四气劫需要多9个劫材(0-1、1—3、2-5、3-7、4-9……)。
Go has its own gas relief three gas-free argument, but occasionally there will be slow gas influx of chess four influx of the situation. In 2000, the “Black Chess” Kim Seung-Jun Seventh (at that time) and “Stonythema” Zhao Han took the first four rounds in South Korea’s biggest chess match - the 5th LG Oil Cup this round of the game appeared in the above situation. Here, we first popularize the formula for easing gas and robbery against mid-level chess players: a single robbery can win with only one more robbery, but one more must be taken to slash a robbery. Because the use of a hijack back, the other party can eliminate a hijack. According to this formula slow gas storms need more than five robbers, slow gas storms need seven more robbers, slow four robbers need more than nine robbers (0-1,1-3,2-5,3- 7,4-9 ...).