Number of solutions by position of X-piece:
 







13














8







 
 
 Total number of solutions: 21
 
1






0







2






2







3






2







4






2







5






2







6






1







7






1







8






0







9






0







10






0







11






0







12






1







13






1







14






2







15






2







16






2







17






2







18






2







19






2







20






2







21






2







 
 View all 21 solutions as a text file…
 View all 14 connections between the solutions as a text file…