Event: A Division

Opponent Rating Result
Joe Spayne 180 0 - 1
Ron A Stather 133 1 - 0
Royce Parker 136 0 - 1
Richard J Harris 140 ½ - ½
Martin P McLoughlin 160 0 - 1
Stephen W MacCormack 146 0 - 1
Jason Gentle 130 ½ - ½
Nicholas Webb 139 1 - 0
Peter McKay 130 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

10 = (1294 + 400 * (2 - 5)) / 9)

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