Just spotted this, haven't listened myself yet, but I know that many Draeseke fans are here:
http://imslp.org/wiki/Kanonische_R%C3%A4tsel,_Op.42_(Draeseke,_Felix)#IMSLP261713 (http://imslp.org/wiki/Kanonische_R%C3%A4tsel,_Op.42_(Draeseke,_Felix)#IMSLP261713)
forgot to but mean to listen to that myself, especially since I've been wanting to hear that piece in _some_ form or other ever since finding/skimming (not, I admit, really going over, but still...) the recent(ish) reprint (of Draeseke's, not of an arrangement :) ) when I saw it at the university library some years back. Will download it soon (one can play or shift-click-open-in-new-window-save-etc. - with a bit of initial trouble and trial-and-error - audio files on IMSLP.)
Eric
I'm not entirely sure how to describe them and Google's translation of the Foreword didn't help, but it's clear what you're supposed to do - 6 short pieces for piano four hands with the 2 players playing the same notes 2 bars apart in treble vs. bass clef, making canon at the 12th. Since only 2 notes go below the compass of a cello I thought they might sound interesting on strings. I recorded the bass lines an octave higher on viola(s) making canon at the 5th, which sounded less artificial so I may post it on Mediafire. I'm sure JSBach would have applauded his ingenuity, and they even work pretty well as music.
Here, as threatened, the set of 6 Canonic Puzzles rendered at the 5th:
http://www.mediafire.com/?yszzwrh9r4jox6n (http://www.mediafire.com/?yszzwrh9r4jox6n)
The March is a bit of a shambles but the rest seems to work OK