Event: Div4

Opponent Rating Result
Jerome Redhead 0 0 - 1
David Short 102 ½ - ½
R Arthur Hall 106 ½ - ½
Michael D Boreham 116 0 - 1
Michael Moon 0 ½ - ½
Alex Abdullahi 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-13 = (324 + 400 * (1 - 2)) / 6)

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