Event: Silver Rook

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Opponent	Rating	Result
Henri Pascal	122	½ - ½
Richard White	118	1 - 0
Andrew Zigmond	129	1 - 0
Richard Hersey	132	1 - 0
Simon Watson	153	½ - ½
Alan Hollaway	117	1 - 0
Paul Salisbury	131	½ - ½

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

357 = (902 + 400 * (4 - 0)) / 7)