LukeNine45: Four points in sente? I think there are a couple ways of reaching this result. I think elsewhere dies.
LukeNine45: Guess that's why I'm still a kyu player... Hopefully I didn't misread this one...
Bill: Well done, Luke! :-) Right tesuji, but it's a 5 point sente.
unkx80: You are lucky that there is a cutting point at a and a liberty at b. Otherwise, can play the placement here and at c would kill...
Now, if at d, then it becomes a 9 point gote for White.
Actually, playing here lives, and the value is still 5 points sente for White.
Bill: Thanks, unkx80! :-)
Sorry, Luke, unkx80's solution diagram is correct. I had not thought of your , but it seemed like another solution, perhaps better, because of ko threats. I did not bother to calculate unkx80's first diagram, thinking I knew its value. Because White's capture at 'd' is so large (3 1/6 by miai counting), his sequence becomes a 5 5/6 point sente. Your loses 5/6 of a point.
LukeNine45: Rather ironically, that's why I had where it was in the first attempt. The second time I was hallucinating that could be at c (in unkx80's first diagram) but now it's clear that that dies. Thanks for a great reading exercise!