Event: Div 4 - Athenaeum Cup

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Opponent Rating Result
Lysander Lawson 0 0 - 1
Martin Wilkes 1225 0 - 1
Michael W Simmons 1152 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

392 = (2377 + 400 * (0 - 3)) / 3)

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