Event: WMA Spring League Division 1

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Opponent	Rating	Result
Rob Sutton	0	½ - ½
Joseph Dance	0	1 - 0
Praveen Joy	0	0 - 1
Marek J Soszynski	1890	0 - 1
Christopher Badley	0	1 - 0
Rob Sutton	0	0 - 1
Joseph Dance	0	0 - 1
Praveen Joy	0	0 - 1
Marek J Soszynski	1890	0 - 1
Christopher Badley	0	1 - 0

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

258 = (3780 + 400 * (3 - 6)) / 10)