Event: Division 2 - Weston Trophy

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Opponent	Rating	Result
Li Jiping	122	½ - ½
David Watson	145	½ - ½
Gerald D Fletcher	148	0 - 1
Geoff Frost	161	½ - ½
Steve B Housley	147	½ - ½
Ian Edmundson	139	½ - ½
Daniel Gottschalk	168	½ - ½
Barry Williams	118	½ - ½
Steve Withington	134	1 - 0
W (Bill) Ward	109	½ - ½

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

139 = (1391 + 400 * (1 - 1)) / 10)