Second Spoil

Just had a lucky win over the top ranked player at table 44, two days ago. This player is the highest rating I have won against so far (1663, after match). Apparently the playing field is more leveled than I had expected, and anyone of my table could emerge victorious this round. A major blunder on his part tipped the balance in my direction. Since it was not won by out-maneuvering the opponent, I shall not post the whole game. In the end I got to play this very simple mate in 2 (moves) that should be solved within seconds.