Event: Durham League Division B

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Opponent	Rating	Result
James Garner	1602	1 - 0
Andy Proudfoot	1531	1 - 0
Peter Townson	1400	1 - 0

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

1911 = (4533 + 400 * (3 - 0)) / 3)