Event: Division 4

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Opponent	Rating	Result
Roger P Newman	1450	1 - 0
Peter J Horlock	1705	0 - 1
David Charters	1570	0 - 1

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

1442 = (4725 + 400 * (1 - 2)) / 3)