Event: Open

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Opponent	Rating	Result
Nigel S Towers	162	1 - 0
Julian H Summerfield	143	1 - 0
Marek J Soszynski	149	1 - 0
Christopher D Lewis	154	½ - ½
Eduardo Sanchez	148	1 - 0(def)
Nigel S Towers	162	½ - ½
Julian H Summerfield	143	0 - 1
Marek J Soszynski	149	½ - ½
Christopher D Lewis	154	0 - 1
Christopher J Evans	131	0 - 1

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

150 = (1347 + 400 * (3 - 3)) / 9)