There is a wealth of information about Mozart's 'Musical Dice' game on
the web.  If one goes to google.com and enters <Mozart dice> into the
search box, over 30,000 hits will be returned, including links to pages
where you can push a button and hear a MIDI rendition of a computer
generated result.  I'm sure the information being sought (instructions)
is detailed on several of these sites.

John Haskey

 [ Carousel Publications, Ltd., offers Mozart's original game for
 [ composing music, "Musikalisches Wurfelspiel", K516f, called "Melody
 [ Dicer" for short.  A variant game for ragtime music fans is
 [ "Scott Joplin Melody Dicer".  Visit
 [ http://www.carousel-music.com/PubMozart.html
 [
 [ A good overview, with an entertaining interactive tune generator,
 [ is at http://sunsite.univie.ac.at/Mozart/dice/index.html  I chose
 [ the harpsichord voice (patch 7 for left and right hands) and pushed
 [ the button "Make Music!"  By Jove -- it sounded like Mozart, or else
 [ a piece that Mozart composed and discarded!  Links to MIDI files
 [ of genuine Mozart compositions are provided, too.  -- Robbie