Event: 4-Board Division 1

Opponent Rating Result
Edward S Oxley 142 0 - 1
J Gerry Johnstone 120 1 - 0
Stephen Garner 88 1 - 0
N Charles Clayton 99 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

312 = (449 + 400 * (3 - 1)) / 4)

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