Event: Division 3 - Under 6400

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Opponent	Rating	Result
Trevor Hurt	1463	1 - 0
Simon Howard	1368	1 - 0
Alan H Davies	1540	1 - 0

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

1857 = (4371 + 400 * (3 - 0)) / 3)