Event: Points Trophy

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Opponent	Rating	Result
Gavin Johnstone	1458	0 - 1
Oscar Wood	1035	1 - 0
Gavin Johnstone	1466	0 - 1

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

1186 = (3959 + 400 * (1 - 2)) / 3)