Event: Division 2

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Opponent	Rating	Result
Graham K Brown	148	½ - ½
Tony C Norris	129	½ - ½
Kenneth G Brown	0	½ - ½
Graham D Neville	151	0 - 1
Andrew E James	128	½ - ½
Tony C Norris	132	0 - 1
Stephen Bush	115	0 - 1
David A Walton	133	0 - 1

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

-83 = (936 + 400 * (0 - 4)) / 8)