I don’t think I’ve ever, in my six decades of playing, won a chess game more quickly than this. With my 4th move I checkmated the Black King this afternoon in a club tournament match.
As you can see from the position of pieces on the board, the vast majority not having moved from their start positions, this was a Chess960 game.
Our move record: 1. Nc3 Nc6 2. b3 e5 3. Ne4 Nd4 4. Nd3 Nxc2#