Event: Holly & the Ivy Chess League

Opponent Rating Result
Craig H Sharpe 1259 1 - 0
Vivien Webster 1686 1 - 0
David Booth 1703 0 - 1
David Booth 1730 0 - 1
Keir O'Connor 1511 0 - 1
Steve Harrington 1652 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1590 = (9541 + 400 * (3 - 3)) / 6)

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