Event: Dudley Townshend Trophy

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Opponent	Rating	Result
John A Moore	1133	1 - 0
Ian A Clack	1541	1 - 0
John Lunn	1555	0 - 1

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

1543 = (4229 + 400 * (2 - 1)) / 3)