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Eternal Life
Path: LifeAndDeath · Prev: DoorGroup · Next: ApproachingALifeAndDeathProblemTheRightWay Path: SecondCourseOnKo · Prev: BentFourInTheCornerIsDead · Next: RepeatingPositions
Keywords: Ko, Rules
Chinese: 长生 Eternal life is yet another situation where a void game (no result: neither player wins, but neither player loses) can occur, under rulesets which permit such a thing. Several special rules, such as superko and the Ing Ko Rule, forbid the recurring sequence to occur. However, eternal life is so rare in games that if one occurs, a Chinese Go text says that: You should buy fish, vegetables, meat and wine And have a good party to celebrate yourself Of course, it's an exaggeration...
This is the situation to begin with.
Black 1 begins by sacrificing two stones (to prevent the formation of bulky five)...
Black 3 takes back two white stones...
White makes a throw in at 4 to destroy the eye, and the cycle repeats itself when Black 5 sacrifices two stones again.
--unkx80 Bill:
White has the option of making seki:
But suppose White needs to kill Black in order to win, and Black would never let go of his group, then eternal life occurs. Bill: Strictly speaking the position after White 1 in the Seki diagram is not seki, but a hyperactive position. However, when it is correct to make the play, it will almost always become seki. ChoseiDoes anybody know what a Chosei is and what the term means? It somehow seems to be related to Ko. --Confused It is the type of position called long life in this reference:
The point is that it is a cyclic position with two stones captured at a time. There was some excitement about this thirty years ago when a variation of the kado joseki played in a title game Sakata-Yamabe could have led to chosei. So, chosei is the same thing as eternal life I wrote some time ago? --unkx80 See Kanazawa Attempts 85. Path: LifeAndDeath · Prev: DoorGroup · Next: ApproachingALifeAndDeathProblemTheRightWay Path: SecondCourseOnKo · Prev: BentFourInTheCornerIsDead · Next: RepeatingPositions This is a copy of the living page "Eternal Life" at Sensei's Library. ![]() |