Standard chess rules apply, except as follows:
 
There is no capturing.
 
The Queen seduces any enemy piece (except the Queen) that she attacks at the end of her move. A seduced piece immediately changes sides.
 
You win by seducing the enemy King.
 
Pawns do not promote to Queens.
 
 
Cleopatra Chess is a pure flipping chess variant in the mold of Benedict Chess and Double Agent Chess, but less chaotic and with more room for thoughtful development of your forces. For an innovative variant combining flipping and traditional capture (and in some cases swapping), check out Keith Carter's Conversion Chess (Kings & Melee versions).