Event: Division 2

Opponent Rating Result
A Rajski 1485 ½ - ½
Eric Mansfield 1507 1 - 0
Ben Taylor 1459 0 - 1
George Fishwick 1507 0 - 1
Eric Mansfield 1474 0 - 1
Peter Hurn 1556 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1298 = (8988 + 400 * (1 - 4)) / 6)

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