Sunday was a bad day for me after a good first day. I threw away round 4 with a mistake on move 8, miscalculating the resulting position from some trades. I missed a chance to get back into it by not playing Rxd4 below.
PeterMellorvDeanMadden.pgnRound 5 was the most frustrating game for me. I was ahead but threw it away by not visualising properly.
I was happy that I spotted 11.Ncxe5 below (11...Bxc5 12. Nxe5 Qxe5 13. Bc3 skewers the Queen to the rook). Fritz says 11. Ba5 is even better.

In the position below I played 33 Nxg6. For some reason I thought him taking with the Queen would leave his Rook undefended. Obviously didn't think it through.

Shortly afterwards he put me out of my misery.
DeanMaddenvRonaldWatson.pgn