Event: Crown Inn Congress

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Opponent	Rating	Result
Max Dooley	1863	0 - 1
Neil Sheffield	1210	1 - 0(def)
Richard Ward	1504	0 - 1
Jos Dent	1222	0 - 1

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

1130 = (4589 + 400 * (0 - 3)) / 3)