Event: WMA Spring League Division 2

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Opponent	Rating	Result
John P Wrench	70	0 - 1
John Foxall	0	½ - ½
Jaspar Goodall	0	0 - 1
Phil Wells	70	1 - 0
Peter J R Oliver	70	0 - 1
John P Wrench	70	0 - 1
John Foxall	0	½ - ½
Jaspar Goodall	0	1 - 0
Phil Wells	70	1 - 0
Peter J R Oliver	70	1 - 0

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

42 = (420 + 400 * (4 - 4)) / 10)