Event: 6-Board Division 2

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Opponent	Rating	Result
Kevin Whitaker	1375	0 - 1
Darren Tomlinson	1200	1 - 0
Stephen Brown	1495	0 - 1

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

1223 = (4070 + 400 * (1 - 2)) / 3)