Event: Durham League Division B

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Opponent	Rating	Result
John Reddington	1543	1 - 0
Stephen J Hall	1837	½ - ½
Jonathan Sams	1829	1 - 0

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

2003 = (5209 + 400 * (2 - 0)) / 3)