Event: Division A

Opponent Rating Result
Graham J Ashcroft 161 1 - 0
Alan Pidcock 138 ½ - ½
Carl Heald 160 0 - 1
Peter A Wilson 145 1 - 0
Norman T Blade 148 1 - 0
Geoffrey Pennington 141 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

282 = (893 + 400 * (3 - 1)) / 6)

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