Jörg Knappen wrote on Sat, Oct 24, 2009 05:06 PM UTC:
In fact, mating with the mirror-rhino can be more complicated than mating with a simple FN, because
the additionaly attacked zebra square provides lot of stalemate traps. A key position in the mirror-rhino's mating manoeuvre is the following:
Black King on a1,a2,or b1; White king on c3, mirror-rhino on f6. Black to move.
Only now the white king can complete the confinement of the black king
--- BTW, the rhino is not colourswitching at all, it is a slider continuing its way after WN squares to
C NN2 .... Adding the wazir to the Gnu essentially gives it the can-mate property.