Event: HDCA Summer League Division 1

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Opponent	Rating	Result
Giles Dunn	150	0 - 1
J Gerry Johnstone	128	1 - 0
N Charles Clayton	102	1 - 0

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

260 = (380 + 400 * (2 - 1)) / 3)