Event: Chessmaster Challenge 80/10

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Opponent	Rating	Result
Alfie Simpson	1131	0 - 1
Tony Lee	1238	0 - 1
Alan Ward	1352	0 - 1

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

840 = (3721 + 400 * (0 - 3)) / 3)