jfc: This is what happened in the game.
jfc: I played a in the original game but also considered b. DrStraw suggested (on GoDiscussions.com) d as a better alternative.
Bill: and look promising, but is unexpectedly effective. seems to make two eyes, but the corner turns into a well known problem.
Bill: looks attractive. Maybe there is a ko.
Bill: (Much later.) It seems that there is a ko somewhere. See Gokyo Shumyo, Section 3, Problem 14.
Bill: But plays at the center of three stones and Black ends up damezumari. (This seems to be a famous problem, too. :-))
jfc: thanks for the suggestion, that looks good!