Shifted Chess (V)
Chess variant whose board has been cut into half vertically, and connected not properly, but slipped by one square vertically.
Otherwise the rules of chess apply, with the following difference:
The initial position is central symmetric (as opposed to mirror symmetric), so both kings are on the right side of the player. The queen-side bishop and knight are flipped so that the two bishops move on different colours.
Robert J. Bell[ChVar.com]