Event: U1800 Championship

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Opponent	Rating	Result
George Smith	1640	½ - ½
Louis Cowell	1507	0 - 1
Dwijen Shilu	1984	1 - 0
Duncan Marshall	1610	1 - 0
George Smith	1693	0 - 1
Louis Cowell	1611	0 - 1
Dwijen Shilu	1768	½ - ½
Duncan Marshall	1599	0 - 1

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

1577 = (13412 + 400 * (2 - 4)) / 8)