Event: Division 1

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Opponent Rating Result
Philip J Hutchings 1935 ½ - ½
Piotr Wasilak 1956 ½ - ½
Piotr Wasilak 1974 ½ - ½
Peter A Gemmell 2073 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2085 = (7938 + 400 * (1 - 0)) / 4)

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