Event: Hepolite (Rapidplay)

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Opponent Rating Result
Stephen Haggas 1540 0 - 1
Stephen Haggas 1540 1 - 0
Gordon Farrar 1824 ½ - ½
Gordon Farrar 1824 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1582 = (6728 + 400 * (1 - 2)) / 4)

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