Event: Division 2

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Opponent	Rating	Result
Ray Sawyer	1563	0 - 1
Michael J Darlow	1555	0 - 1
Roger Bray	1540	½ - ½

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

1286 = (4658 + 400 * (0 - 2)) / 3)