Event: Norfolk County Chess Championships- Challengers

Opponent Rating Result
Kenneth R Ellis 1396 ½ - ½
Dan Joal Allwin Christopher 0 ½ - ½
Stephen Livermore 1622 0 - 1
David B Elsey 1389 1 - 0
Benjamin Whalley 1450 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1171 = (5857 + 400 * (1 - 1)) / 5)

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