Event: D&DCL Div 1

Opponent Rating Result
Martin Pettinger 1728 0 - 1
Edward T Bromilow 1870 1 - 0
David J Pickering 1758 ½ - ½
David J Pickering 1758 ½ - ½
Justin Smith 1525 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1808 = (8639 + 400 * (2 - 1)) / 5)

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