In one of the quickest club-based Correspondence Chess games I’ve ever played, I checkmated the opposing Black King a few days ago with my White Queen on the seventh move.
The final board position of the game is above, at the top of this post, and the move record follows:
1. Nf3 f6 2. d4 Nc6 3. Nc3 a6 4. e4 g5 5. d5 Ne5 6. Nxe5 fxe5 7. Qh5#