Sam Loyd, 1860
[fen "8/8/8/8/B6n/7p/6k1/4K3 w - - 0 1"] 1.Bd7!! h2 2.Bc6 Kg1 3.Bh1!! Kxh1 4.Kf2.
(Ke1, Ba4; Kg2, Nh4, h3) says mate in 54 after 1.Bd7!! h2 2.Bc6 Kg1 3.Bh1!! Kxh1 4.Kf2.
This is a textbook draw, as the king is on the same square as the knight (with Black to move). For example, in some moment 1...Nf4+ 2.Kf1 Ng3+ 3.Kf2 Ne2 4.Kf1. (No. 205, BCE. Fine.)
Mate in 54? What's up with that?