Event: Division 3

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Opponent	Rating	Result
Stephen Smithson	1331	0 - 1
Brian Jones	1168	1 - 0
Bill Kimberley	1150	½ - ½
Marc Carter	1100	1 - 0
Brian Jones	1168	1 - 0
David Gaskell	1150	1 - 0
Peter Turner	1322	1 - 0
James Topp	1364	0 - 1
Rhys Morgan	1150	½ - ½

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

1345 = (10903 + 400 * (5 - 2)) / 9)