Event: Div3

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Opponent	Rating	Result
Nigel Wright	128	½ - ½
Dean M Hartley	141	0 - 1
Sam Clayton	119	1 - 0
Brian Lever	121	½ - ½
Wallace M Bryce	110	0 - 1
Stephen G Wootton	133	0 - 1
Roger W Walker	113	0 - 1
J Martin Gibson	71	1 - 0

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

17 = (936 + 400 * (2 - 4)) / 8)