Event: Worcestershire Rapidplay league

Opponent Rating Result
Arnold G Kirkland 1597 1 - 0
Mark Bethel 1810 0 - 1
Alex Eaton 1731 0 - 1
Aiden Griffiths 1330 1 - 0
John H Loynes 0 ½ - ½
Arnold G Kirkland 1597 1 - 0
Mark Bethel 1810 1 - 0
Alex Eaton 1731 0 - 1
Aiden Griffiths 1330 0 - 1
John H Loynes 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1254 = (12936 + 400 * (4 - 5)) / 10)

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