German chess composition glossary I'm trying to look through some puzzles at http://www.wenigsteiner.de/, but there are some abbreviations I'm not familiar with that I'm having a hard time finding through Google; I guess they are abbreviations for German words, but I don't know German. Is there a glossary with such words?
In particular:

I think VRZ just means defensive retractor, short for &quot;Verteidigungsrückzüger&quot;, but what is VV VRZ? (Seen in Andreas Thoma's problems from 2018 preselection)
What is kBP 22.0 (I'm guessing &quot;shortest proof game&quot;, but I'm not sure how)? (Seen in the First Prize problem from 2018)
VV is Vorwärtsverteidigung - if a position is retracted into where Black might interfere (by mating White himself ?!), he may. kbP is indeed SPG.
A translation source for many problem chess terms