Event: Division 2

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Opponent	Rating	Result
George Fishwick	1567	0 - 1
Ronnie Sutton	999	0 - 1
Mark Haydock	1244	1 - 0

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

1137 = (3810 + 400 * (1 - 2)) / 3)