Event: Open

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Opponent	Rating	Result
Patrick CM Duncan	184	0 - 1
Gordon SG Christie	145	1 - 0
Golam S Ali	164	½ - ½
Cory S Hazlehurst	189	½ - ½
Robert Glass	160	1 - 0
Patrick CM Duncan	184	0 - 1
Golam S Ali	164	0 - 1
Cory S Hazlehurst	189	½ - ½
Robert Glass	160	1 - 0

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

171 = (1539 + 400 * (3 - 3)) / 9)