#9 The cats do not benefit from removing a king, at least under the rules in #1.
#10 This is also interesting, though cats are normally more random...
In fact perhaps white and black can even be one team with the goal to create a checkmate while cats will block and disrupt this goal.
Another new feature: cats may be allowed to ambush a moving piece in addition to kicking standing pieces away. For example a queen is moving from a1 to h8, a cat on f5 may kick the queen out when it is passing through e5.
#10 This is also interesting, though cats are normally more random...
In fact perhaps white and black can even be one team with the goal to create a checkmate while cats will block and disrupt this goal.
Another new feature: cats may be allowed to ambush a moving piece in addition to kicking standing pieces away. For example a queen is moving from a1 to h8, a cat on f5 may kick the queen out when it is passing through e5.