Helpmate

Originally posted by David113
[fen]8/8/8/8/8/5k1K/5pp1/2N5[/fen]

Helpmate in 4 moves
3 solutions

1. ... g1=N+
2. Kh4 Kg2
3. Nd3 Kh1
4. Kg3 f1=B
5. Nf2#

1. ... g1=R
2. Kh4 Kg2
3. Nd3 Kh1
4. Kh3 f1=N
5. Nf2#

SOLV'D (heinzkat)