Event: 2021 Jamboree

Opponent Rating Result
Roy A Ludlow 1675 ½ - ½
Matthew W Goatcher 1675 0 - 1
Gregory Roome 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

850 = (3350 + 400 * (0 - 2)) / 3)

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