Event: Hillingdon Div 2

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Opponent	Rating	Result
Jason Obihara	1765	0 - 1
Maximillian Papachristos	1624	1 - 0
Daniel Evans	1709	0 - 1
Jason Obihara	1767	0 - 1
Alexander Horwood	1497	½ - ½
Tamir Morgan	1581	0 - 1
Phil McKenna	1420	0 - 1
Arthur Cann	1529	0 - 1
Mark Connor	1415	1 - 0
Matthieu Fulhaber	1568	0 - 1

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

1388 = (15875 + 400 * (2 - 7)) / 10)