Typescript: Can I define an n-length tuple type?

Question

I am creating a shogi game board using Typescript. A shogi board has 9 ranks and files.

I\'d like to assert a 9x9 multidimensional array as a type to ensure both the

Answer 1

One quick simplification would be to create a Tuple9 type, that can be used to create the first level as well as the second level of the matrix:

type Tuple9 = [T, T, T, T, T, T, T, T, T]
type Board9x9
 = Tuple9>