Main Solution  

is the key move that aims at the cut at a and effectively stops from escaping.

At any time, White can make the exchange of x/y or y/x , but the rest of the solution stays the same.

We will take a look at White's responses a, b , and c.

Resistance 'a'

 

After , White can't get both x and y.

Resistance 'b'

 

After , White can't get both x and y.

In fact, at y would probably be better, but this diagram also explains the variation when Black plays before .

Resistance 'c'

 

After , White can't get both x and y.

Herman Hiddema: What if white plays at z, making x ko and defending the cutting point y at the same time?

char: I am not sure =p.

 

char: Maybe this..? Although I don't really like it because it depends on escaping.

 

Herman Hiddema: Black can't even escape I think. Difficult problem :-)
char: I will take a look at it again tomorrow after I get some sleep. In the mean time, if you are sure that this doesn't work, feel free to change the solution.

Another Solution  

char: Does that meant this doesn't work either?

Herman Hiddema: I think so. I've thought long and hard about it, but I haven't found a good reply to this (or to in the other variant)

Another Solution  

Black can switch the order of play by starting with .

 

Compare with Resistance 'a', here doens't stop from escaping.

 

is the same for at x.

 

Starting with or x is a good way to kill one's own group in gote.