Event: 400 League

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Opponent	Rating	Result
Ivan Basarab-Horwath	111	1 - 0
Robert Black	117	0 - 1
Mick Wombell	116	½ - ½
John Speck	102	½ - ½
John Speck	102	1 - 0
Roy Evans	80	½ - ½
Robert Black	117	½ - ½
Mick Wombell	116	½ - ½
Ian Barker	112	½ - ½

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

153 = (973 + 400 * (2 - 1)) / 9)