Event: Division 2

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Opponent Rating Result
Chris Lake 1805 ½ - ½
Stephen D Blewitt 1773 ½ - ½
Robert Wall 1695 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1624 = (5273 + 400 * (0 - 1)) / 3)

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