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Sonnenborn-Berger system

Tie-breaking method.  One adds up the total scores of the player one beats and half the scores of the players with who one draws and compares the total with the total of the player with who one ties.  The SB system was invented by Oscar Gelbfuhs in 1873 and used in the 1873 Vienna tournament.  It derives its name from English player William Sonnenborn and Austrian endgame expert Johann Berger, who advocated this tie-break system.

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