Interesting mate in 2

Mate in 2.

How many mate threats does the key move create?
Does that mean the solution has duals (more than one possible mate after a black defense)?

Originally posted by David113
[fen]7b/p2R2B1/rp4p1/pr4pp/PRb1NkBP/2N1p1pP/8/K7 w - - 0 1[/fen]

Mate in 2.

How many mate threats does the key move create?
Does that mean the solution has duals (more than one possible mate after a black defense)?

1.Nc5! with seven threats: Ne6, Nd5, Nd3, Ne2, Rf7, Rd4, Rxc4.
However, after any Black move, only one mate remains, so there are no duals.

1...Bxg7 2.Nd3#
1...bxc5 2.Rxc4#
1...Rxc5/Rxb4/axb4 2.Rd4#
1...gxh4 2.Ne6#
1...hxg4 2.Rf7#
1...e2 2.Nd5#
1...g2 2.Ne2#

All threats are realized in at least one variation.