Main line: HashimotoUtaro Variations: unkx80, Dieter
White lives in seki because Black can at most almost fill her eye space with a bent four.
As you can see: 4 and 5 are miai.
There is death in the hane : The door group is dead.
If White answers the marked stone (Black 4) with 5, Black kills with 6 by making miai of a and b.
Referenced byGokyoShumyoSectio...