I wrote in my last blog entry that while guessing Morphy games, I also spent some time learning simple (in terms of the number of pieces) endgames, like king and pawn endgames and minor piece endgames.
I only have had the bishop-and-knight mate once (never on the defending side), but it came just after I turned 7 years old! Amusingly, as that was one of the checkmates that Richard Shorman had taught me, I had some sense of what to do.
I was white against Edmund Rendler, both of us probably around 1100-rated players (my first USCF rating was 1000), and it was played at the Koltanowski (Kolty) Chess Club in Campbell, CA on July 18, 1991.
8/8/1N2k3/8/4KB2/8/8/8 w - - 0 90)
Actually, there was no reason for it to even get here. I had won a couple pieces in the middlegame, but instead of exchanging all the pieces and leaving just my extra material and pawns, I traded all the extra material and pawns, leaving myself with just the bishop and knight.