Event: Division 2

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Opponent Rating Result
David W Fone 1597 ½ - ½
Peter J R Oliver 1589 ½ - ½
Emmet Clarke 1574 ½ - ½
Amraya K Johal 1204 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1591 = (5964 + 400 * (1 - 0)) / 4)

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