Event: U1850

Opponent Rating Result
Randolph E Donahue 1789 ½ - ½
Christopher Hodgson 1752 ½ - ½
David Barnes 1755 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1899 = (5296 + 400 * (1 - 0)) / 3)

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