Event: Division 2

Opponent Rating Result
James W Goodhead 1743 0 - 1
Neil Graham 1760 0 - 1
Nick J London 1706 0 - 1
David Griffiths 1649 0 - 1
D Philip Morgan 1734 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1398 = (8592 + 400 * (0 - 4)) / 5)

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