Event: Rated club games

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Opponent	Rating	Result
Adrian Bond	1303	1 - 0
Roy A Ludlow	1665	½ - ½
Wieslaw Stanicki	1420	1 - 0
Roy A Ludlow	1636	0 - 1
Alex Mountford	1421	1 - 0
David L Weston	1654	0 - 1
Anthony K Ransom	1095	1 - 0
Anthony K Ransom	1095	1 - 0

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

1561 = (11289 + 400 * (5 - 2)) / 8)