Event: Sheffield Chess Centre Open

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Opponent	Rating	Result
Ayodeji Jeje	2017	0 - 1
David Wells	1848	0 - 1
John R Huthwaite	1808	1 - 0
Srivathsan Sasikumar	1875	0 - 1
Gary Hinchcliffe	1781	0 - 1
Eldars Gulijevs	1864	0 - 1

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

1599 = (11193 + 400 * (1 - 5)) / 6)