Event: Div 2 - Weston Trophy

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Opponent	Rating	Result
Wafia D Al Maamari	2058	½ - ½
Martin J Sheard	1880	0 - 1
Peter Hulse	1705	½ - ½
Richard E Desmedt	1753	½ - ½
Jacob O'Brien	1703	0 - 1
Gerald D Fletcher	1835	½ - ½

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

1689 = (10934 + 400 * (0 - 2)) / 6)