This is a common castle in chu shogi, which is seen in many games. It seems impregnable, as the blind tigers protect each others' blindspots and the drunk elephant also covers the front, with the gold generals flanking the king. However, it has some important weaknesses.1+R-67Gote pins (and immobilizes) the blind tiger. Now it is no longer protecting its twin's blindspot.2G-3c3Ln-794G-4c5Ln-7aCheckmate6BTx7a6.K-5c7.Lnx6bx5c6.K-7c7.Lnx6bx7c7+Rx6c