Solution:
1...Kf5 2.Qg5#
1...Rxe4 2.Nd7#
1...Nf4 2.Qc3#
1...Nf8/Ng5/Ng7/Nd8/Nc5 2.Rc5#
1...Nd4 2.Rc5#/Qh2#
1...Nc7 2.Qd6#
5 tries skipped1.Rxe6+??
1...Kf5 2.Qg5#
but 1...Bxe6!
1.Ng3?? (2.Nd7#)
1...Nf4 2.Qc3#
1...Nf8/Ng5/Ng7/Nd8/Nc5 2.Rc5#
1...Nc7 2.Qd6#
but 1...Nd4!
1.Ng5?? (2.Nd7#)
1...Nf4 2.Nf3#/Qc3#
1...Nf8/Ng7/Nd8/Nc5 2.Nf3#/Rc5#
1...Nxg5 2.Rc5#
1...Nd4 2.Qh2#
1...Nc7 2.Nf3#/Qd6#
but 1...Kf5!
1.Nd6?? (2.Nd7#)
1...Nf4 2.Qc3#/Nc4#
1...Nf8/Ng5/Ng7/Nd8/Nc5 2.Rc5#/Nc4#
1...Nd4 2.Qh2#/Nc4#
1...Nc7 2.Nc4#
but 1...Bxd6!
1.Nc3?? (2.Nd7#)
1...Kf5 2.Qg5#
1...Nf8/Ng5/Ng7/Nd8/Nc5 2.Rc5#
1...Nd4 2.Qh2#
1...Nc7 2.Qd6#
but 1...Nf4!
1.Rc4! (2.Nd7#)
1...Kf5 2.Qg5#
1...Nf4 2.Qd4#/Qc3#
1...Nf8/Ng5/Ng7/Nd4/Nd8/Nc5 2.Rc5#/Qh2#
1...Nc7 2.Qd6#/Qh2#
1.Nf2! (2.Nd7#)
1...Kf5 2.Qg5#
1...Nf4 2.Qc3#
1...Nf8/Ng5/Ng7/Nd8/Nc5 2.Rc5#
1...Nd4 2.Nd3#
1...Nc7 2.Qd6#