Event: Division Four

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Opponent	Rating	Result
Milenko (Mike) Walner	0	0 - 1
Mike J Groombridge	131	½ - ½
Ian Ellis	133	0 - 1
Stephen M Fryer	125	1 - 0(def)
Mike J Johnson	121	1 - 0
Will Vout	122	½ - ½
David M Cotterell	113	½ - ½

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

37 = (620 + 400 * (1 - 2)) / 6)