Event: Norfolk County Chess Championships- Challengers

Opponent Rating Result
Alan L Holmes 1229 1 - 0
Ben Yelverton 1734 0 - 1
David C May 1498 0 - 1
Mark Philip Baldock 1468 1 - 0
Joseph Grant 1620 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1430 = (7549 + 400 * (2 - 3)) / 5)

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