Event: NSDCA Division 4

Opponent Rating Result
Derek Whitehurst 1505 ½ - ½
James Wolstenholme 1586 0 - 1
Michael Keenan 1344 1 - 0
Rowan J Webb 1235 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1518 = (5670 + 400 * (2 - 1)) / 4)

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