Event: Silver Rook

Opponent Rating Result
Murray Purkis 0 1 - 0
Robert A South 0 1 - 0
David Halpin 0 1 - 0
Gary Corcoran 0 0 - 1
Paul Gelder 0 1 - 0
Steve Westmoreland 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

133 = (0 + 400 * (4 - 2)) / 6)

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