GokyoShumyoSection5Problem20/Attempts

first attempt  

atulab: here makes an eye, which kills black hopes of doing anything here so black must prevent this eye at all costs:

another attempt  

this ends in a ko which could be what we're looking for ... but as it is taken first by white, there should/could be better lines of play

(10 captures 12 stones)  

Edit: I know why it works. I had been throwing in where white plays 7 and 5. It's very key NOT to do this.

Atulab's ko solution is the best resistance by white. It's not bad for black because he has at least 1 local threat to escape at J15. --gnostic?

Herman: Yes, these diagrams demonstrate nicely why white should play as in atulab's second diagram.

unkx80: gnostic, could you use proper convention when making diagrams. In particular, removing all numbered stones should result in the starting position. =)