Event: Harmsworth Cup

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Opponent	Rating	Result
Michael H Micklethwaite	1641	½ - ½
Joseph Morris	1245	1 - 0
Nico Roestorff	1485	0 - 1
Clive J Le Baigue	1477	1 - 0
Colin G Gregory	1529	0 - 1
Leon A Garfield	1377	1 - 0
David Sawyer	1407	1 - 0
James Cole	1636	½ - ½

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

1575 = (11797 + 400 * (4 - 2)) / 8)