Event: Division Two

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Opponent Rating Result
Vivien Webster 137 ½ - ½
Ian Craig 0 ½ - ½
Arthur Thompson 107 1 - 0
Les Johnson 129 1 - 0
Derrick J Mason 97 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

334 = (470 + 400 * (3 - 0)) / 5)

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