Event: Division 4

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Opponent	Rating	Result
Iain Smith	1567	½ - ½
Shay Hanlon	1707	0 - 1
Bob Steele	1487	0 - 1

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

1320 = (4761 + 400 * (0 - 2)) / 3)