Event: League Division 2

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Opponent	Rating	Result
Neil Calderbank	0	1 - 0
Zana Aziz	1789	1 - 0
Andy J Bagley	1870	1 - 0

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

1620 = (3659 + 400 * (3 - 0)) / 3)