Event: Division 1 - Davy Trophy

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Opponent	Rating	Result
Craig Chatterton	131	½ - ½
Ken Hunter	144	½ - ½
Andrew J Mort	163	0 - 1
Andrew Birtwhistle	0	0 - 1
Alan S McIntosh	150	½ - ½
Alan Story	110	1 - 0
R (Bob) Lindsay	90	1 - 0

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

113 = (788 + 400 * (2 - 2)) / 7)