Side blocking position

In this game (www.littlegolem.net/jsp/game/game.jsp?gid=1365175&nmove=55), around move 55 I managed to reach a rather "awkward" defensive position on my right side. At least it's the first time I got to see it.

Any other interesting positions you've ever had?

PS: I am quite puzzled at my reaching rank #14 despite still having nearly no understanding of the strategy... I'm mostly brute-forcing through the end positions and just defending as much as I can otherwise. Any tips, especially viz. the opening?