Event: Summer League Section 2

Opponent Rating Result
Derek A Sheppard 1698 0 - 1
Michael A Pollard 1646 ½ - ½
Chris J Matthews 1833 1 - 0
Jack Walker 1650 ½ - ½
Maksym Larchikov 1750 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1635 = (8577 + 400 * (1 - 2)) / 5)

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