BQM 286

corner  

pwaldron?: I think extending may be the wrong way to go here. You would like to keep your stones connected if at all possible. Here are a couple of sequences I would look at.

Alex: should certainly not be Black's first thought. It isn't often that playing into a "double hane-at-the-head-of-two" is good.

IanDavis: This is what I thought as I played, but the other path seems to allow some ko like play for White, and I couldn't see that this line was bad. Normally one would extend from a crosscut. So Black 4 could have been a descent for example?

corner  

This looks fine for Black, especially if the ladder at b is good, so that White can't cut at a.

corner  

If Black throws in a cut midway through the sequence, you look okay also. It's tough to imagine a ponnuki being a poor result. There is a potential followup at a later since White is a little short of liberties.

corner  

Even continuing from your sequence, the Black cut at a has a followup at b, so White has to give up the corner. It's a big corner, so Black won't be taking a loss here unless White has a mammoth moyo on the part of the board not shown.