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Gun Eight Discussion
Keywords: Life & Death
I was explaining to my younger brother how he could use the following position as a source of kothreats.
I asked him, if he were to play twice with White, which points he would choose. He chose the marked ones. Very good I said, this way you threaten seki, taking 8 points from me, which is much more than the 1-point ko we are fighting. What I ignored, was the fact that playing the 2-2 point actually makes seki !!!
The points 2 and 3 are miai; so are 4 and 5
Bill Spight: This is a standard position.
After White 1, Black 2 threatens to kill the white stone, forcing White 3.
Black 4 - White 5 makes seki. White 5 - Black 4 does the same. (Though White 5 indicates a desire to avoid ko. In that case Black's reply at 4 is not urgent.) Seki is the usual result, but there is a throw-in ko.
White can throw a stone into the corner to make a two-step ko. Or Black can throw in at 2 to make the same ko.
However, this ko normally favors White, so Black will usually make seki.
This is a copy of the living page "Gun Eight Discussion" at Sensei's Library. ![]() |