Zakhodyakin 1930

The beginning is easy: 1.g7+ Nxg7 2.Nf7+ Kg8 3.Bc5! f1Q 4.Nh6+ Kh8, but the most elegant move is still to follow...

The only way. More natural continuations like 5.Bd4 or 5.Ba3 (with the idea of Bb2) don't work after correct queen checks, but now White has built an amazing fortress. His bishop goes to e5, and Black can't make progress.