score:8
Your error is to assume the sub camps were only to the west of Stuthoff. Numerous camps were in areas that are now in the Kaliningrad oblast (Gerdauen/Zheleznodorozhny, Heiligenbeil/Mamonowo, Jesau/Juschny and Seerappen/Lyublino), one of them even in KΓΆnigsberg itself.
While besides Serappen all of these sites were some distance from KΓΆnigsberg, the marches took several days to reach Palmnicken (from memorialmuseums.org:
As the Red Army was approaching, the SS dissolved the East Prussian sub-camps of Stutthof concentration camp in January 1945 and gathered the approximately 13,000 prisoners in KΓΆnigsberg. On January 26, the SS...and their foreign helpers herded at least 5,000 Jewish women from Poland and Hungary onto a death march in the biting cold to Sambia peninsula on Baltic coast. Only 3,000 arrived in Palmnicken, the rest were murdered by the accompanying commando on the way there. On the evening of January 31, 1945, members of the local German Volkssturm...took the Jews to the beach. There the SS guards shot the Jewish women or drove them into the icy Baltic Sea in which they froze to death.