Approaches to Attack

Excuse me:
I hav been playing with Robot lv2 for a while. I know that it is a hard engine, but it seems as if I do not put enough pressure on it it would not blunder at all. The castles I end up dealing with in middle-game are quite difficult as I see no way to break through. Please share with me some methods of breakthrough. Thank you.
Please look at some of my games for reference. By the way, I don't know the correct way to yagura but I think I could figure this out eventually.

You can't post in the forums yet. Play some games!

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