Event: Billingham Synthonia Chess Club Championship 2023-24

Opponent Rating Result
David Brookes 1000 1 - 0(def)
Keith Harrison 1576 ½ - ½
Stephen J jnr Roe 1708 1 - 0
Brian Whitaker 1544 ½ - ½
Andrew Herrity 1000 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1557 = (5828 + 400 * (1 - 0)) / 4)

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