Event: Dons Club Challengers

Opponent Rating Result
Chris Jones 1630 0 - 1
Graham R Jones 1496 ½ - ½
Matthew J Morter 1531 0 - 1
Stephen F Crane 1472 ½ - ½
Madhurima De 1346 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1335 = (7475 + 400 * (0 - 2)) / 5)

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