Event: Div 1 - Davy Trophy

Opponent Rating Result
Ewan Cormack 2008 ½ - ½
Oscar J Idle 2049 0 - 1
Ewan Cormack 2008 ½ - ½
Chris CW Shephard 2195 0 - 1
Phil Griffiths 1936 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1959 = (10196 + 400 * (1 - 2)) / 5)

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