Event: Division 2

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Opponent Rating Result
Liam O'Connor 1557 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1557 = (1557 + 400 * (0 - 0)) / 1)

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Opponent Rating Result
Dave Hodkinson 1619 0 - 1
Rhys Morgan 1350 1 - 0
Andrew E Taylor 1566 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1512 = (4535 + 400 * (1 - 1)) / 3)