Event: NSDCA Division 4

Opponent Rating Result
David A Hallen 1465 ½ - ½
Neville S Jones 1508 ½ - ½
Timothy Weston 1328 0 - 1
Andrew Crosby 1405 ½ - ½
Roger Coleman 1241 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1389 = (6947 + 400 * (1 - 1)) / 5)

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