Event: Division 4

Opponent Rating Result
Peter Ackland 1550 0 - 1
Peter Fisher 1420 0 - 1
Charles Higenbottam 0 0 - 1
Oba G Kofi 1360 1 - 0
Brian Crewe 1627 0 - 1
Philip Geary 0 1 - 0
Leigh Rummings 1429 1 - 0
Roy Whaley 1265 1 - 0
Charles Higenbottam 1108 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1040 = (9759 + 400 * (4 - 5)) / 9)

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