Chess Puzzle - Series 3004

White to move. How should white proceed ?

Source : chessdailynews.com

GM_Knockout said ;

1. Bc1!! Kxc1
2. Nde2+! Kb1
3. Nec3+ Kc1
4. Ke2 Rb1
5. Ncxa2#

OR

1. Bc1!! a3
2. Kd2! Ka2
3. Nac3#

OR

1. Bc1!! a3
2. Kd2! Ra2
3. Nac3+ Ka1
4. Nda3#

- White won 1-0