Event: WMA Spring League Division 2

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Opponent	Rating	Result
Robin Hayles	1604	1 - 0
Richard D Leaper	1645	1 - 0
David Mountford	807	1 - 0
Mark Riley	0	0 - 1
Matthew Little	1604	0 - 1
James Treasure	0	1 - 0
Marten Panchev	0	1 - 0
Robin Hayles	1604	0 - 1
Richard D Leaper	1645	1 - 0
David Mountford	807	1 - 0
Mark Riley	0	1 - 0
Matthew Little	1604	½ - ½
James Treasure	0	1 - 0
Marten Panchev	0	1 - 0

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

1009 = (11320 + 400 * (10 - 3)) / 14)