Event: Rainham Championship Div 1

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Opponent Rating Result
Chris D Brown 0 ½ - ½
Robert Springett 1656 1 - 0
Tobias W Stock 1986 0 - 1
Andrew C Waters 1909 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1488 = (5551 + 400 * (2 - 1)) / 4)

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