Heptominoes and pentominoes W X Y Z
Giovanni Resta 2004  g.resta@iit.cnr.it
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Update! Dec 2010.
Col. George Sicherman has found this
nice improved solution for the subproblem AN-Z.

Update! Col. George Sicherman has found this
wonderful new solution for the subproblem DQ-Z.

Update! Col. George Sicherman has found this
improved solution for the subproblem DL-Y.




Heptominoes and pentomino X


Heptominoes and pentomino Y



Heptominoes and pentomino Z
See at the beginning of the page for an improved solution for AN-Z.