Double-King Chess 960

A great alternative to any Double King Chess setup is Double King Chess 960.
Before the start of the game, two different position is selected for the left and right side of the board from all 960 starting positions.

For example, in the above image, position # 216 is selected for the left side of the board, and position #1 for the right side.

The normal chess rules apply, except that each of the kings can castle only on their side of the board, according to Fischer Chess rules.

A player wins by checkmating either one of the opposing kings. If two of the opponent's kings are in check at the same time and it is impossible to eliminate this check for both kings (at least one is still in check), then this situation is considered as a checkmate.

Here is an example of this situation.

White threatens to win with one move: Ql8 double check and since it is impossible to save two kings from check at the same time (one of them still remains in check), then according to the rules of Double King Chess this is checkmate.
But now it's black's move:
1...Rk1+ 2. Rxk1 Qm3+ and 3...Qxk1#

The king on h1 is doomed, and that's enough to win.

The game is well balanced. The emerging positions are so complex and ambiguous that it makes Double King Chess 960 an amazing chess variant.