Event: Division 4

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Opponent	Rating	Result
David P Holmes	1306	1 - 0
Peter J Hickman	1578	0 - 1
Alison Walton	1210	1 - 0

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

1498 = (4094 + 400 * (2 - 1)) / 3)