It's not too difficult, it's all about the pairs in the clues. Many of the pairs will only fit into one possible column. Try setting it out with 1-5 columns, then rows labelled in this order:
House Colour
Nationality
Pet
Drink
Cigs
This way makes it very easy to spot the pairs and their constituent columns.
Hope this helps. Fun little riddle
House Colour
Nationality
Pet
Drink
Cigs
This way makes it very easy to spot the pairs and their constituent columns.
Hope this helps. Fun little riddle