Optionally

Playing chess optionally is the same as playing chess asymmetrically except players are not required to mirror their opponents non-pawn pieces and white starts the placement of the non-pawn pieces instead of black. Players are required to place a piece on the same file back rank square as the opponent, but they can choose the same piece or a different piece. White chooses first since choosing first is a slight disadvantage. Two minutes are allowed for each player to choose what piece to place down. This time limit can of course be different.

An example of a first row starting position when playing chess optionally is BRNKRBNQ for white and QBNRKRBN for black. In this example short castling for white would be on the A side of the board since that is the side the white king is closest to and long castling for white would be on the H side of the board since that is the side the white king is furthest away from. For black short castling would be on the H side of the board since that is the side the black king is closest to and long castling would be on the A side of the board since that is the side the black king is furthest away from.