I expected to play tsuke-nobi ( at after at a). made me think "Ha! Interesting" but the cross-cut made it a little too interesting (i.e. too complicated for me to deal with at the board).
I played at a and while it didn't cost the game ( :-) , the white player told me after the game that he played and to gain speed and at a had helped him with that goal. He also said that it was joseki until .
I still feel uncomfortable about it.
Your analysis and comments are appreciated.
Also, don't believe it when people tell you about joseki!
mAsterdam Thanks again, Charles. I'll confront white with your remarks next time I see him. Joseki? Schmoseki!
See Net Example 10 for detailed discussion on this.
If, on the contrary, is played at here, Black loses his corner but he gains sente. I assume this is what you played in the game.
mAsterdam: Sorry for not answering your guess. I couldn't remember. Later I asked my opponent, but even together we could not reconstruct the way we handled it. We both felt Black could have done better locally. I have to develop my game memory. This week I practiced writing the game down while playing - that also would have helped the analysis afterwards.