We can make with diamonds what we made previously with triangles ; we obtain :
aire = area
( diamond = losange in french )
The higher sizes jut out the tray ; we have to try them out of the tray :
L(7) with area 98 and L(8) with area 128 ... L(9) has area 162 ; we have to make hole with area 18, as the area of L(3) : we obtain LT(9/3) with area 144 which is the challenge 032.
We have also :
and, out of the tray, L(4r) with area 96 ; L(5r) has area 150 : with a hole with area 6, as L(r), we obtain LT(5r/r) with area 144 which is the challenge 018.