Event: 4 Board League B

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Opponent	Rating	Result
Peter D Ward	1600	1 - 0
Mike J Barnett	1670	0 - 1
Alistair P Curd	0	0 - 1

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

957 = (3270 + 400 * (1 - 2)) / 3)