Event: Hepolite (Rapid Play)

Opponent Rating Result
performance = (sum(opponents ratings) + 400(wins-losses)) / games

0 = (0 + 400 * (0 - 0)) / 0)

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Opponent Rating Result
John E Parr 0 1 - 0
John E Parr 0 1 - 0
John DH Milnes 159 0 - 1
John DH Milnes 159 1 - 0
John K Holliday 127 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

329 = (445 + 400 * (4 - 1)) / 5)