Event: Division 3

Opponent Rating Result
Leslie Pringle 1603 1 - 0
Peter Schnatterbeck 1738 0 - 1
Peter Hazell 1728 ½ - ½
Mark C England 1601 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1568 = (6670 + 400 * (1 - 2)) / 4)

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