Event: A Division

Opponent Rating Result
Steven B Booth 1967 1 - 0
Stephen W Dauber 2036 ½ - ½
Peter Ridsdale 1892 1 - 0
Nicholas Webb 1888 1 - 0
Samuel Greig 1767 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2150 = (9550 + 400 * (3 - 0)) / 5)

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