Event: Division 4

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Opponent	Rating	Result
John Lascelles	1706	½ - ½
Barry DA Fraser	1458	1 - 0
Peter Grant-Ross	1523	1 - 0

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

1829 = (4687 + 400 * (2 - 0)) / 3)