Event: Rolls Royce Championship

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Opponent	Rating	Result
Norman J Davies	0	½ - ½
Tomasz D Adamski	0	0 - 1
Alistair Jones	0	0 - 1
Gilberto Templo	0	0 - 1
George Moorcroft	0	0 - 1

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

-320 = (0 + 400 * (0 - 4)) / 5)