I am not sure exactly what this is called.. Gokigen Nakabisya (ゴキゲン　中飛車 = good mood center file rook)、 Wanpaku　Nakabisya（ワンパク中飛車=impish center rook　）　or Kaku koukan nakabisya (角交換中飛車= Center file rook with Bishop exchanged) Whatever this is called, it is easy to remember, and this strategy has very powerful offence.