Event: 5th Somerset New Year Minor

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Opponent	Rating	Result
James Wallman	0	1 - 0
Nidal Shah	0	0 - 1
Keven A Lamb	0	½ - ½
Kevin D Markey	1438	1 - 0
Martyn J Maber	1508	0 - 1

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

589 = (2946 + 400 * (2 - 2)) / 5)