Event: Chessmaster Challenge 80/10

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Opponent	Rating	Result
Arthur W Wells	1121	1 - 0
Paul Terry	1749	0 - 1
Simon Green	1684	0 - 1

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

1385 = (4554 + 400 * (1 - 2)) / 3)