Event: Division 2

Opponent Rating Result
Lynda Smith 1815 0 - 1
Timothy Manton 0 ½ - ½
Dave J Williams 1721 1 - 0
Alex Kent 1808 ½ - ½
Jacob Parker 0 1 - 0
Roy Whaley 1280 1 - 0
Peter Marks 1680 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1358 = (8304 + 400 * (4 - 1)) / 7)

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