The players across from each other are partners. All pieces have the usual moves.
Win by capturing either enemy King.
Pawns promote from all positions from all the squares where forward movement is impossible from.
Your pawns can jump over any friendly man if the space beyond is empty. There is no castling.

If you want to only play 1 color, use Ctrl-H to choose moves for your partner.

Captain Charles Verney invented a chess variant usuing this board in 1881.
This is my particular set of rules.