Event: Holly & the Ivy Chess League

Opponent Rating Result
Brendan Briggs 92 1 - 0
Dave Colledge 1781 ½ - ½
Robert Mitchell 1689 0 - 1
Keir O'Connor 1564 0 - 1
Amelia Fretwell 1403 0 - 1
Dave Colledge 1799 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1255 = (8328 + 400 * (1 - 3)) / 6)

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