Event: Norman Ellis (Open)

Opponent Rating Result
Clive W Davies 1875 ½ - ½
Dale H Cullum 1860 ½ - ½
Jael J de Sousa Muachikape 1850 0 - 1
Neil Griffiths 1657 ½ - ½
Mike Bramson 1978 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1684 = (9220 + 400 * (0 - 2)) / 5)

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