Event: B&DCL Div 4

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Opponent	Rating	Result
Seth DR Rider	109	0 - 1
Adam Jaggard	102	0 - 1
Roger D Howell	91	1 - 0
J Mike Davies	117	½ - ½
David Arorash	113	0 - 1
Christine A Roberts	95	1 - 0
Chris JF Ambrose	108	½ - ½
C James Fox	101	1 - 0

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

105 = (836 + 400 * (3 - 3)) / 8)