Berlin theme. Model mate.
Tries: 1.Se2? (thr. 2.Sf4/Sg3#) but 1…Rc8#! (Berlin mate)
1.Ra4? but 1...Rxc3!
Other tries: 1.Re7? but 1...Kxh4! 1.Sg6? but 1...hxg6! 1.Sf5? but 1...Rxc3! 1.Se2? but 1...Rc8+!
Solution: 1.Sg2 Bxg2 2.Ra4 (thr. 3.Rh4#) bxa4 3.Se2 (thr. 4.Sf4#) Rc8+ (Berlin mate downgraded) 4.Ka7 (thr. 5.Sf4/Sg3#) Rxd8 5.Sf4+ Kh4 6.Rg4# MM
