With the victory of evil triangles, some systems went from hisec to losec. and as Neo said, there is a triangle system called Pochven, Which CCP says wasn’t on their plan to make, but capsuleers failing to keep systems caused Pochven to happen, I still think it was planned out all along…
Back after 6 Years - My stuff now in Trig System! this has some good info for how to get into Pochven