Event: Norfolk & Norwich Challengers

Opponent Rating Result
Alex Wheeler 1438 1 - 0
Pranavsuriya Kumarvimala 1127 1 - 0
Joe Ross 1700 ½ - ½
Jack Packwood-Clarke 1400 0 - 1
James Casey 1757 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1564 = (7422 + 400 * (2 - 1)) / 5)

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