Event: Division 2

Opponent Rating Result
Grenville Wollerton 1723 0 - 1
David Griffiths 1585 0 - 1
Patrick Allen 1550 0 - 1
Maurice J Hill 1772 ½ - ½
Nigel Wright 1681 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1342 = (8311 + 400 * (0 - 4)) / 5)

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