Event: Division 3 - Under 6400

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Opponent	Rating	Result
Simon Howard	1461	1 - 0
Arthur Doble	1431	0 - 1
George McNally	1400	1 - 0

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

1564 = (4292 + 400 * (2 - 1)) / 3)