Event: Division 2

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Opponent	Rating	Result
Lee R Osmon	1312	1 - 0
Robert L Jones	1659	½ - ½
Robert Kent	1571	0 - 1
Ed Kirkham	1755	0 - 1
Raf Calumpiano	1484	½ - ½
David Welsh	1507	0 - 1
Robert Kent	1549	0 - 1
Daniel Such	1567	½ - ½
Jim Buis	1734	0 - 1

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

1393 = (14138 + 400 * (1 - 5)) / 9)