Event: Division A

Opponent Rating Result
Peter J Kobryn 160 0 - 1
Martin Lythgoe 164 ½ - ½
Mark A Whitehead 167 ½ - ½
Conor Reaney 173 0 - 1
Peter J Kobryn 160 ½ - ½
Graham J Ashcroft 161 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

31 = (985 + 400 * (0 - 2)) / 6)

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