Event: 400 League

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Opponent Rating Result
Ivan Basarab-Horwath 111 ½ - ½
Mike Hoyes 80 1 - 0
Arkady English 103 ½ - ½
Peter Sharman 80 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

294 = (374 + 400 * (2 - 0)) / 4)

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