Event: Schofield league

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Opponent Rating Result
A Jon Munsey 135 1 - 0
Joshua P Blackmore 143 ½ - ½
Rob A Oughton 127 0 - 1
Charles V Howard 155 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

140 = (560 + 400 * (1 - 1)) / 4)

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