Event: Division 3

Opponent Rating Result
Roland Robson 1511 0 - 1
Roger Ball 1461 1 - 0
Patrick Eaton 1398 0 - 1
Alex Kagkalis 1547 0 - 1
Andy Johnson 1609 0 - 1
Paul Davies 1528 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1309 = (9054 + 400 * (1 - 4)) / 6)

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