All the Maharajah's are not unique of course. A Maharajah is the same of course with another Maharajah.
So the following is not true:"
"A position that has a Maharajah-1 on a1 and a Maharajah-2 on a2 is different from the position that has the Maharajah-2 on a1 and the Maharajah-1 on a2."
Both positions are the same............

As for the Extinction, Redsales after Bb5+ there is the O-O-O! which saves the day(remember you can castle at Extinction when you are in check!).
As for the 1.e5 Ng8 2.b4 Qb6 3.Be3 Bc5? 4.Bxc5 Walter, there is the 3...c5! that leads to no win in less 3 moves.........
And there is no win in less than 6 moves for white.