Event: Division 1 - Davy Trophy

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Opponent	Rating	Result
Jonathan A Tait	195	0 - 1
Tom Leah	181	0 - 1
Oskar A Hackner	215	0 - 1
Andrew Butterworth	160	½ - ½
D Martin Howard	175	0 - 1
Szilard Tamas	155	½ - ½
Khaled Muflehi	172	½ - ½
Jim Davis	173	½ - ½

performance = (sum(opponents ratings) + 400(wins-losses)) / games

-22 = (1426 + 400 * (0 - 4)) / 8)