There are 17 valid 5x5 grids
- Assuming minimum word length of 3.
- And that words must be half-checked, rounded up.

⬛⬛⬛⬛⬜
⬜⬜⬜⬜⬜
⬜⬛⬜⬛⬜
⬜⬜⬜⬜⬜
⬜⬛⬛⬛⬛

⬜⬛⬛⬛⬛
⬜⬜⬜⬜⬜
⬜⬛⬜⬛⬜
⬜⬜⬜⬜⬜
⬛⬛⬛⬛⬜

⬛⬛⬛⬜⬛
⬜⬜⬜⬜⬛
⬛⬜⬛⬜⬛
⬛⬜⬜⬜⬜
⬛⬜⬛⬛⬛

⬛⬜⬛⬛⬛
⬜⬜⬜⬜⬛
⬛⬜⬛⬜⬛
⬛⬜⬜⬜⬜
⬛⬛⬛⬜⬛

⬛⬛⬛⬜⬛
⬛⬜⬜⬜⬜
⬛⬜⬛⬜⬛
⬜⬜⬜⬜⬛
⬛⬜⬛⬛⬛

⬛⬜⬛⬛⬛
⬛⬜⬜⬜⬜
⬛⬜⬛⬜⬛
⬜⬜⬜⬜⬛
⬛⬛⬛⬜⬛

⬛⬜⬜⬜⬜
⬛⬜⬛⬜⬛
⬛⬜⬜⬜⬛
⬛⬜⬛⬜⬛
⬜⬜⬜⬜⬛

⬜⬜⬜⬜⬛
⬛⬜⬛⬜⬛
⬛⬜⬜⬜⬛
⬛⬜⬛⬜⬛
⬛⬜⬜⬜⬜

⬛⬛⬜⬜⬜
⬜⬛⬜⬛⬜
⬜⬜⬜⬜⬜
⬜⬛⬜⬛⬜
⬜⬜⬜⬛⬛

⬛⬜⬜⬜⬜
⬜⬛⬜⬛⬜
⬜⬜⬜⬜⬜
⬜⬛⬜⬛⬜
⬜⬜⬜⬜⬛

⬜⬜⬜⬛⬛
⬜⬛⬜⬛⬜
⬜⬜⬜⬜⬜
⬜⬛⬜⬛⬜
⬛⬛⬜⬜⬜

⬜⬜⬜⬜⬛
⬜⬛⬜⬛⬜
⬜⬜⬜⬜⬜
⬜⬛⬜⬛⬜
⬛⬜⬜⬜⬜

⬜⬜⬜⬜⬜
⬜⬛⬜⬛⬜
⬜⬜⬜⬜⬜
⬜⬛⬜⬛⬜
⬜⬜⬜⬜⬜

⬜⬜⬜⬛⬛
⬜⬛⬜⬛⬛
⬜⬜⬜⬜⬜
⬛⬛⬜⬛⬜
⬛⬛⬜⬜⬜

⬜⬜⬜⬜⬛
⬜⬛⬜⬛⬛
⬜⬜⬜⬜⬜
⬛⬛⬜⬛⬜
⬛⬜⬜⬜⬜

⬛⬛⬜⬜⬜
⬛⬛⬜⬛⬜
⬜⬜⬜⬜⬜
⬜⬛⬜⬛⬛
⬜⬜⬜⬛⬛

⬛⬜⬜⬜⬜
⬛⬛⬜⬛⬜
⬜⬜⬜⬜⬜
⬜⬛⬜⬛⬛
⬜⬜⬜⬜⬛