Event: Nuneaton Internal Tournament 2

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Opponent	Rating	Result
Colin J Green	0	0 - 1
Thomas Glenn	0	0 - 1
Terry F Clay	0	1 - 0
Mark Fisher	0	0 - 1
Anthony J Green	0	½ - ½

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

-160 = (0 + 400 * (1 - 3)) / 5)