The Defuser was hired by each side because of two reasons. The Queen, being a proper lady, chose not to participate. The Defuser is the only piece that is able to defuse the Bombs. To defuse a Bomb, the Defuser captures it like any other piece. The opposing Bomb is them removed from the board without exploding.
Pawns move as normal, with a two-step option on the first move.
En passent is possible. Therefore, I will not allow a sex change to take place in my variant. If the check cannot be alleviated, the game is won for the checking player. One of course may not destroy one's own King, as that person would lose. Castling This is the same as in ordinary chess, except for the square references.