Event: NSDCA Division 4

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Opponent	Rating	Result
Malcolm Green	1250	1 - 0
Timothy Weston	1328	0 - 1
Martin J Chadwick	1271	0 - 1

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

1150 = (3849 + 400 * (1 - 2)) / 3)