Event: 7th Peter & Peggy Clarke Memorial

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Opponent	Rating	Result
Christine F Constable	1595	1 - 0
Lloyd Retallick	1851	½ - ½
Paul A Aston	1868	1 - 0
John DM Nunn	2551	0 - 1
Peter J Worthington	1666	0 - 1
Brian GE Gosling	1870	½ - ½

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

1900 = (11401 + 400 * (2 - 2)) / 6)