Event: Division 3

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Opponent	Rating	Result
Brian M Hayward	1698	0 - 1
Julius Vasiliauskas	1514	0 - 1
Ross Murphy	1720	1 - 0
Brian M Hayward	1698	½ - ½
Barry T Redburn	1667	0 - 1
Rob Jarvis	1641	0 - 1
Trevor FW Lewis	1512	0 - 1
David Griffiths	1559	1 - 0
Alan J Nelder	1609	1 - 0
Graham Neil	1575	½ - ½

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

1539 = (16193 + 400 * (3 - 5)) / 10)