Event: Ron Bruce League

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Opponent	Rating	Result
James Day	1722	½ - ½
Michael H Stinton-Brownbridge	1896	0 - 1
Robert G Wilby	1624	0 - 1
Nick J Butland	1957	0 - 1
Michael H Stinton-Brownbridge	1896	0 - 1
James Day	1722	0 - 1
Caleb Caleshu	1915	0 - 1
Nick J Butland	1957	1 - 0
Robert G Wilby	1624	1 - 0
Caleb Caleshu	1915	0 - 1

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

1623 = (18228 + 400 * (2 - 7)) / 10)