4-4 point low approach three-space low pincer high approach

White's 'c' reply  

Against this Black can still lean on the stronger stone with the outer attachment of , building a wall in the direction facing the pincer.

After Black has a choice: a is peaceful, while b and c can lead to complications. Jantiff

Charles Matthews That looks like handicap play to me. A common line in pro games starts like this.

Diagonal attachment  

This was with and tries to make a good attacking play, and a bad stone. Of course there can be a ko ...

Diagonal attachment (continuation)  

... like this.