Event: A Division

Opponent Rating Result
Raymond Stonehouse 1936 1 - 0
John S Garnett 1959 0 - 1
Paul Gregory 1936 1 - 0
Virgil Szekely 2172 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2101 = (8003 + 400 * (2 - 1)) / 4)

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Opponent Rating Result
Matthew Jackman 2015 1 - 0
Kevin J Wilson 1944 ½ - ½
Dominic Leigh 1752 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2170 = (5711 + 400 * (2 - 0)) / 3)