Event: NSDCA Division 4

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Opponent	Rating	Result
Ian Mullin	1200	0 - 1
Steve Ballantyne	1356	0 - 1
Robert Perry	1174	1 - 0

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

1110 = (3730 + 400 * (1 - 2)) / 3)