Event: D&DCL Div 3

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Opponent	Rating	Result
Michael D Boreham	1499	1 - 0
Garry Sands	1590	1 - 0
Graham J Pace	1495	½ - ½
Joe Willgoose	1292	½ - ½
Tony O'Donovan	0	1 - 0
Edward Brown	1498	1 - 0
Andre Cockburn	1658	1 - 0
Gary Monks	1640	½ - ½
Garry Sands	1590	½ - ½

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

1585 = (12262 + 400 * (5 - 0)) / 9)