Event: Derby Long play

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Opponent	Rating	Result
Andre Cockburn	119	0 - 1
Luke Woodward	36	1 - 0
Colin Ross	117	1 - 0
Stephen Lamont	143	0 - 1
Andre Cockburn	119	½ - ½

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

107 = (534 + 400 * (2 - 2)) / 5)