In Kaliningrad (the Russian name for Konigsberg) there are
Chapter 9, Problem 9.5.9(choose chapter or problem)
In Kaliningrad (the Russian name for Konigsberg) there are two additional bridges, besides the seven that were present in the eighteenth century. These new bridges connect regions B and C and regions B and D, respectively. Can someone cross all nine bridges in Kaliningrad exactly once and return to the starting point?
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