Event: Dudley Townshend Trophy

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Opponent	Rating	Result
Mark Tangri	0	0 - 1
Paul Furniss	0	1 - 0
Roger Threlfall	139	1 - 0

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

180 = (139 + 400 * (2 - 1)) / 3)