Event: Division B

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Opponent	Rating	Result
David E Aspinall	1719	0 - 1
Richard Smith	1450	½ - ½
Philip N Raynor	1760	0 - 1

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

1376 = (4929 + 400 * (0 - 2)) / 3)