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    vs.      
William Hahn is tied in the series against Robert Graves, 1-1.

event round table player one result player two
Grand Prix Las Vegas 2017 (modern)714Hahn, William (1914)Lost 0-2Graves, Robert (1982)
Grand Prix Dallas-Fort Worth 20185242Hahn, William (1826)Won 2-0Graves, Robert (1860)