Event: League Division 2

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Opponent	Rating	Result
Jack Booker	1838	0 - 1
Frank T Sheldrick	1696	1 - 0
Xingyu Zhao	0	0 - 1
Mike Berry	1578	1 - 0
Peter Galloway	1481	1 - 0

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

1399 = (6593 + 400 * (3 - 2)) / 5)