Event: Division 4

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Opponent	Rating	Result
David Griffiths	1547	½ - ½
R (Bob) Abrahart	1609	0 - 1
Graham I Ladds	1937	1 - 0
Grenville Wollerton	1745	1 - 0
John R Huthwaite	1731	1 - 0
Richard Myers	1695	½ - ½
Alberto Rodriguez	1503	1 - 0
Joshua Pimm	0	1 - 0

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

1671 = (11767 + 400 * (5 - 1)) / 8)