Expected: the orange cell occupies a 2-column-by-2-row block in the top left; the purple cell spans rows 1–3 in the last column; the green cell spans columns 1–3 in row 4. Slot-filling must route the smaller cells around all three without overlap.
| 2x2 block | r1c3 | rows 1-3 | |
| r2c3 | |||
| r3c1 | r3c2 | r3c3 | |
| columns 1-3 | r4c4 | ||