Can I use my Tafl game to play Thud?

Question

I recently purchased a new game: Hnefatafl

Now as far as I'm aware, this is the game that Thud is based on, which is the real game I want to play. For reference, here is my set:

And here are my pieces:

I have twelve defenders, and 24 attackers. It looks like those aren't enough (based on the number in the wiki link), so how can I make up the numbers? Or can I play n a smaller board?

Also, what is the best way to reproduce that original board? Do I need to consider anything balance-wise if I do shrink the board/number of pieces? What else should I consider?

edit:

This is actually hnefatafl according to this wikipdia page I found

Answer 1

I think what you have bought is a Tablut set, which is a reduced version, and actually survived into the twentieth century. Viking Hnefatafl had 25 defenders and 50 attackers on a larger board, but the rules are (believed to be) the same.

And Thud, from the link, is a board game (inspired by Discworld) created by Trevor Truran. It seems a bit unfair to try and play it without buying a set, but if you do you can, of course, try out any combination of board and pieces; at what point you move into creating your own game is an interesting point.

Finally, more for casual visitors than as a real answer; the Thud Lord Vetinari plays exists only in Terry Pratchett's fertile brain. A boardgame has been officially approved, but it would be as unwise to try and follow the Dwarf King's actual strategy as it would to try and build a network of semaphore towers across the land.