Event: Division 2

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Opponent	Rating	Result
Chris Haynes	140	½ - ½
David A Walton	133	0 - 1
Ken A Parker	107	0 - 1
Steve Holtz	94	1 - 0
John B Harris	115	1 - 0
Keith Patterson	144	½ - ½
Stephen Bush	114	0 - 1
Siddharth Venkatanarayanan	119	0 - 1
Adrian Walker	142	0 - 1

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

-10 = (1108 + 400 * (2 - 5)) / 9)