Event: Division 2

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Opponent	Rating	Result
Richard Collis	1495	0 - 1
Nigel Pollett	1768	0 - 1
Thomas Ash	1621	0 - 1

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

1228 = (4884 + 400 * (0 - 3)) / 3)