Mathematics for Computer Science

14.4. Hanging Out Over the Edge 421

1=2 3=4

table

(a)

1=4 1=2

table

(b)

Figure 14.9 Two ways to achieve spread (and hence overhang)3=4withnD 2
blocks. The first way (a) is from Case 1 and the second (b) is from Case 2.