Event: Summer League Division 1

Opponent Rating Result
Peter Ackley 2130 ½ - ½
Chris CW Shephard 2125 0 - 1
Xi-Yang Guo 2049 0 - 1
Richard E Desmedt 1791 1 - 0
Rob Vincent 1627 1 - 0
Peter Ackley 2130 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1909 = (11852 + 400 * (2 - 3)) / 6)

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