Event: Division 2

Opponent Rating Result
Ian P Blencowe 126 1 - 0
Ainsley Killey 127 1 - 0
Andrew E James 128 0 - 1
Graham K Brown 147 ½ - ½
David A Walton 106 0 - 1
David A Walton 106 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

123 = (740 + 400 * (2 - 2)) / 6)

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