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    vs.      
Shinichi Kumagai is tied in the series against Hiroki Yamada, 1-1.

event round table player one result player two
Grand Prix Utsunomiya 20026148Kumagai, Shinichi (1765)Lost 1-2Yamada, Hiroki (1496)
Grand Prix Kyoto 2003850Kumagai, Shinichi (1669)Won 2-0Yamada, Hiroki (1543)