Daily chess puzzle: Check Mate #436

Another puzzle from Dragoslav Andric’s 1981 book “Matni Udar”.  
White to play and mate Black. 

Zeubchel v Sprenger, Rostock 1977
Solution 
Easy today. 1 Nc5 is an automatic decision (using the language of Jacob Aagaard’s excellent recent book ‘Thinking Inside the Box’). 

If the N is captured, then 2 bc or 3 dc are both mate. Otherwise, smothered mate follows e.g. by 1…Rb8 2 Rd7+! Nd7[] 3 Re6mate, or by 2 Re6+ and 3 Rd7.
FEN 
r4n2/p5R1/1ppk2p1/3p2p1/NP1P2Pr/8/P1P3P1/2K1R3 w – – 0 1