Event: Division RP1

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Opponent	Rating	Result
Derek R Johnson	1990	0 - 1
Gary P O'Grady	1599	1 - 0
Thomas West	1556	1 - 0
Sebastian Twisk	1735	½ - ½
Derek R Johnson	1990	1 - 0
Gary P O'Grady	1599	0 - 1
Thomas West	1556	1 - 0
Sebastian Twisk	1735	½ - ½

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

1820 = (13760 + 400 * (4 - 2)) / 8)