Event: WMA Spring League Division 1

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Opponent	Rating	Result
Harry G Evans	1959	1 - 0
Kevin Hurney	2048	1 - 0
Stephen D Mellor	0	1 - 0
Patrick D Reid	2035	0 - 1
Henrik Stepanyan	2372	0 - 1
Stephen V Woodhouse	1916	1 - 0
Harry G Evans	1959	1 - 0
Kevin Hurney	2048	1 - 0
Stephen D Mellor	0	1 - 0
Patrick D Reid	2035	1 - 0
Henrik Stepanyan	2372	1 - 0
Stephen V Woodhouse	1916	1 - 0

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

1988 = (20660 + 400 * (10 - 2)) / 12)