The undying Nissl/Davidson hoax

I have received a mail by a chess friend alleging once more that the famous Nissl rundlauf was anticipated by Davidson. As Michael McDowell with confirmation of Alain Godbout has reported many years ago, the position (solution see link) is a Nissl original, not anticipated by Davidson in 1899.

Dear Caissa, let's lay this rumor to rest finally!

Theodor Nissl

Akademische Monatshefte für Schach 1910

White to move and mate in 6 moves