Event: Summer Open Division

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Opponent	Rating	Result
Neil Clarke	163	½ - ½
Frank Wood	145	½ - ½
Simon C Smith	160	0 - 1
John Pitcher	206	½ - ½
Neil Clarke	163	½ - ½
Frank Wood	145	1 - 0
Simon C Smith	160	½ - ½
John Pitcher	206	0 - 1

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

119 = (1348 + 400 * (1 - 2)) / 8)