Event: Division 1

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Opponent Rating Result
Scott M Robson 1980 ½ - ½
Stephen Coughlan 2020 0 - 1
John Cawdery 2086 0 - 1
Peter Jaszkiwskyj 1956 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1811 = (8042 + 400 * (0 - 2)) / 4)

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