Event: Division 4

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Opponent	Rating	Result
Michael J Gunn	1623	0 - 1
Christine Coates	1338	½ - ½
Chris Eliadis	1503	0 - 1

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

1221 = (4464 + 400 * (0 - 2)) / 3)