Event: Division Four

Opponent Rating Result
Nigel Foster 1603 ½ - ½
Larry Wright 1805 0 - 1
Chris East 1525 ½ - ½
John Grant 1620 ½ - ½
Gregory Parkes 1512 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1613 = (8065 + 400 * (1 - 1)) / 5)

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