Event: Ringwood Rapidplay Open

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Opponent	Rating	Result
Thomas R Anderson	1672	1 - 0
Paul Northcott	1934	0 - 1
Clive R Bowley	0	1 - 0
Keith DF Gregory	1983	1 - 0
Johnathan D Bourne	1869	½ - ½
John P Weatherlake	2043	½ - ½

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

1717 = (9501 + 400 * (3 - 1)) / 6)