You need to print 6 pieces :
You will need some patience and dexterity to success this one !
Here is the link for the solution (on this fantastic french website about “Casse-tête”) :
http://collection.cassetete.free.fr/1_bois/planchettes_japonaises/planchettes_japonaises.htm
Print Settings :
PrusaSlicer 2.6.1
The author marked this model as their own original creation.