Let's remind ourselves of the position, with Stephen, as White, to move:
1. Ra8+ Kh7winning the rook. The end position looks like this:
2. Nxf7! (a move with enormous potential)
2. ... Qe4 (to restrict the white queen after the forthcoming check)
3. Rh8+ Kg6
4. Qxe4+ dxe4
Nice one, Stephen, and all played in less a minute.