Event: WMA Autumn League Division 2

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Opponent	Rating	Result
Matthew Rowe	1252	0 - 1
David Close	1697	0 - 1
Samuel Skinner	1110	½ - ½
George Mitchell	1328	0 - 1
Matthew Rowe	1252	1 - 0
David Close	1697	0 - 1
Samuel Skinner	1110	1 - 0
George Mitchell	1328	½ - ½

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

1247 = (10774 + 400 * (2 - 4)) / 8)