Issues searching for FSRS scheduling properties

The FSRS search introduced in 2.1.64 has a few problems that I’ve noticed.

  1. prop:cdn:r>0.9 searches for cards that had a retention (retrievability?) greater than 90% when it was last reviewed. Instead, it should search for cards that have a current retention greater than 90%. Retention at last review is a relatively meaningless statistic. Searching for r>0.9 (with the FSRS helper addon installed) gives a more accurate result, however, r>0.9 doesn’t work in a filtered deck which is unfortunate.

  2. The FSRS helper addon has the ability to search for r,d,s in a different way from how anki natively does it. The two versions of the search (prop:cdn:s>40 and s>40) (prop:cdn:d>5 and d>5) result in a different number of cards. prop:cdn tends to show more cards than the FSRS helper. Not sure which one is more accurate.

cdn is a generic feature for getting custom data from cards, and has no knowledge of FSRS. Providing functionality like the add-on will not be possible unless the FSRS code is ported into Anki, which may happen at some point in the future.

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.