Event: 4-Board Division 2

Opponent Rating Result
Giles Dunn 1698 0 - 1
Maxim Trofimov 1900 ½ - ½
Michael C Hackett 1630 0 - 1
John Burton 1263 0 - 1
Neil Hambly 1375 ½ - ½
Raymond Martin 1210 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1379 = (9076 + 400 * (1 - 3)) / 6)

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