By the new German spelling, &quot;Schloss&quot; is written with two s, since the o is short. In the old spelling, it was written &quot;Schloß&quot;.<p>On the other hand, for &quot;Straße&quot; the new spelling does not change the ß to ss, since the a is long.<p>The best possible way to handle the ß is not transcribing it. In crossword puzzles it is transcribed as ss. In general, it is discussed whether one should rather transcribe ß as ss or sz (since ß is originally a sz ligature).