Event: Division 3

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Opponent	Rating	Result
Amanthika Anbalagan	1505	½ - ½
Keith W Roper	1735	1 - 0
Gavin Dow	1432	0 - 1
Andrew Watson	1558	0 - 1
Graham J Gibson	1629	0 - 1
Amanthika Anbalagan	1505	0 - 1
Richard Dyce	1468	1 - 0

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

1433 = (10832 + 400 * (2 - 4)) / 7)