There are now only 18 squares left in the highlighted area, which is the more central parts of Berlin. After I have filled them, I can expand. Especially the blank square in Grunewald (left) haunts me, it should be easily filled by a tour through the forest, like the one I did just above that square.
I’m not doing much biking at the moment though. And now it’s Monday so I have to start working. Today: Paying bills and doing book-keeping for May, sigh.