Event: 3rd Western Counties Online Championships

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Opponent	Rating	Result
Jason Henderson	1680	0 - 1
James I Chilton	1813	0 - 1
Guy Greenland	1649	1 - 0

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

1581 = (5142 + 400 * (1 - 2)) / 3)