Event: Division 1

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Opponent	Rating	Result
David O Collier	1946	½ - ½
Roger Hardy	1786	½ - ½
Robbie CH Hirst	49	1 - 0

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

1394 = (3781 + 400 * (1 - 0)) / 3)