Event: D&DCL Div 1

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Opponent	Rating	Result
Andrew Robins	1788	½ - ½
Derek A Jarvis	1877	0 - 1
John S Shaw	1758	1 - 0

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1808 = (5423 + 400 * (1 - 1)) / 3)