Daily chess puzzle: Check Mate #470

470
Try to find the game: how did the position arise?
Another puzzle from Dragoslav Andric’s 1981 book “Matni Udar”.
Black to play and mate White

Kötz v Günzel, Berlin 1979
Solution
A nice one today.
Examine all biffs means 1…Re4+! has to be looked at.
When you see that 2 Ke4 Qg4+ is mate, you know that the move 1…Re4+ has to be looked at.

2 de is therefore the ‘better’ defence, in that 2…Qg4 mate is obvious, or a forcing move which mates. After 2 de the quiet move 2…Ba6 can be seen to be extremely powerful.

White’s best is 3 Ng6+! since 3…fg?? leads to mate after 4 Qe8+ Kh7 5 fg mate. So 3…Kh7[] 4 Nf4 defending d3:

But 4…Qd1+ mates in two.

FEN
4r2k/pb3pp1/3p1p1p/P2P1P2/Q2K3N/1pBPP2R/4q1P1/8 b – – 0 1