Event: Rainham Championship Div 1

Opponent Rating Result
Oliver James 1690 0 - 1
Keith Nevols 1863 0 - 1
Keith Nevols 1873 ½ - ½
Tobias W Stock 2052 0 - 1
Oliver James 1789 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1613 = (9267 + 400 * (0 - 3)) / 5)

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