Event: Div 1 - Davy Trophy

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Opponent	Rating	Result
Alan S McIntosh	1840	0 - 1
Kevin R Marshall	1741	0 - 0
D Martin Howard	1965	0 - 1

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

1503 = (3805 + 400 * (0 - 2)) / 2)