Berlin theme with a Roman decoy. Model mate.
Tries: 1.e5? (thr. 2.Bh7#) but 1…Bc6#! (Berlin mate)
1.Bd3? (thr. 2.Rc8# 1... Bc3/Bc5 2.Bc4+ d5 3.Bxd5+ e6 4.Bxe6#) but 1...Bh3!
Solution: 1.Rf1! (thr. 2.Rf8#) Bxf1 (Roman decoy) 2.e5 (thr.3.Bh7#) Bb5+ (Berlin mate downgraded) 3.Kxb5 ~ 4.Bh7# MM 2...Bd3 3.Bxd3 ~ 4.Bh7#
