Learning from Takemiya

Initial position (move 48 marked)  

Black wants to ensure his massive moyo on the right. Note, there is plenty of bad aji at a, which might be exploited later.

moves 51-60  

Black treats the stones lightly, in order to settle the lower left corner in sente.

SnotNose: I recently learned that the shape in the lower right can turn ko with a black move at a instead of . See Joseki-related life-and-death example 3.

moves 69 and 70  

After ensuring some more territory with , Black decided to play a submarine move at a, using the aji of and the threat to connect somewhere around f.

With the presence of and inside of Black's territory (there is no need to call it a moyo anymore!), the cut starting with a white move at b is not frightening.