In my most recent Horsham Club Championship game, played a couple of Tuesdays ago against Anthony Higgs, both players managed to surprise each other in the opening. Anthony chose the Gruenfeld, an opening that I have played against him a number of times but never the other way round. In response, I deviated from the 3 f3 he was surely expecting, and played instead a less common line, introduced by Polugayevsky. However, Anthony responded strongly against this, gaining a good position; I am not sure how I could have played better. Then I slipped up further, giving him a good position, but he wrong seized the opportunity to exchange queens, when the endgame proved surprisingly good for me, despite my extended pawns. In this endgame, I seem to have missed some decent chances of my own; in the end, the game ended up as a draw.
I give the game below with some notes.