Event: U1800 Cup

Opponent Rating Result
Robert W Stephens 1728 ½ - ½
Les J Jones 1728 1 - 0
Les J Jones 1726 0 - 1
John WF McAllister 1643 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1706 = (6825 + 400 * (1 - 1)) / 4)

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