Event: Division 1

Opponent Rating Result
Mike Bramson 1971 0 - 1
Richard Porter 1819 ½ - ½
Phil R Watson 2144 ½ - ½
Peter Shaw 2160 0 - 1
Richard Porter 1858 ½ - ½
Phil R Watson 2159 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1885 = (12111 + 400 * (0 - 2)) / 6)

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