Event: Lincoln Standardplay

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Opponent	Rating	Result
Peter G Sherlock	1554	0 - 1
John Housego	1460	1 - 0
Dave Bull	1717	0 - 1

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

1444 = (4731 + 400 * (1 - 2)) / 3)