Tournaments in this variants are being held in AISE , and it is and has been played regularly in postal chess variant games. Below, you find the rules as this game is officially played in AISE . Rules Several pieces are given extra possibilities. Thus, there are nine different pieces in the opening setup, shown below. Pawn a7, b7, c7, d7, e7, f7, g7, h7.
Pawns can promote to empress, amazon, princess, queen, rook, knight, and bishop.
Kings can also castle with an empress. All other rules are as in orthodox chess. Written by Hans Bodlaender. With thanks to Alessandro Castelli for information on the rules for this variant.