Event: Division 2

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Opponent Rating Result
Eddie Banks 1729 0 - 1
James Grimston 1600 ½ - ½
James Harrison 1519 1 - 0
Warwick Estlea 1473 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1480 = (6321 + 400 * (1 - 2)) / 4)

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