Event: Division 1

Opponent Rating Result
M John Cawston 1796 0 - 1
Ben Barton 1669 1 - 0
Richard B Mounce 1843 0 - 1
Norman G Andrews 1585 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1723 = (6893 + 400 * (2 - 2)) / 4)

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