Learning from Robert Fisher, the Exchange Variation suited me then and now. This game did not follow the positional lines leading to a passed Kingside pawn advantage but with 12.Nxd6 became tactical. Although it is an eventual Kingside breakthrough that wins.
15. Nf5!? Qd7? 16 Bh6! gxh6?? 17 Qxf6 and mate next move. I risk this idea a move later but it leads into unclear waters.
I had written the postcard for 33. f4 but steamed the stamp off and sent 33. Nf5 trying to defend my Pawn on a5, for example ...Nc4 34. Nh6+ Kg7 35. Nxf7 Nxa5 36.Nd6 Nb3 37.Nxb7 Nxb1 38.Kf2 winning. While 33...Nd3 34.Rxd3 Rxc1+ 35.Kf2 threatens to win the Bishop.
40.Nc8 was a tactical shot but I preferred to calm things down.
44...Ke8! Best choice.
In the final position John ran out of time but I am breaking through anyway, 1-0.