Event: R Division

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Opponent	Rating	Result
Michael Jones	1396	1 - 0
Ryan Chattopadhyay	1164	0 - 1
Tim Goddard	1410	0 - 1
William Earnshaw	181	0 - 1
Aaron Lewis	1097	1 - 0
Michael Jones	1396	1 - 0
Ryan Chattopadhyay	1164	0 - 1
Tim Goddard	1410	0 - 1
William Earnshaw	181	0 - 1
Aaron Lewis	1097	0 - 1

performance = (sum(opponents ratings) + 400(wins-losses)) / games

890 = (10496 + 400 * (3 - 7)) / 10)