Event: D&DCL Div 1

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Opponent	Rating	Result
Andrew Toothill	162	0 - 1
Andrew J Mort	163	½ - ½
Andrew J Mort	163	½ - ½

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

29 = (488 + 400 * (0 - 1)) / 3)