There are 43 interesting 7x7 grids. - Assuming minimum word length of 3. - And that words must be half-checked, rounded up. - And where 'interesting' means each row must have at least 3 white squares. ⬛⬛⬛⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬛⬛⬛ ⬛⬛⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬛⬛ ⬛⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬛ ⬜⬜⬜⬜⬛⬛⬛ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬛⬛⬛⬜⬜⬜⬜ ⬜⬜⬜⬜⬜⬛⬛ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬛⬛⬜⬜⬜⬜⬜ ⬜⬜⬜⬜⬜⬜⬛ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬛⬜⬜⬜⬜⬜⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬛⬛⬜⬜⬜⬜⬛ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬛⬜⬜⬜⬜⬛⬛ ⬛⬜⬜⬜⬜⬛⬛ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬛⬛⬜⬜⬜⬜⬛ ⬜⬜⬜⬜⬛⬛⬛ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬛⬛⬛⬜⬜⬜⬜ ⬜⬜⬜⬜⬜⬛⬛ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬛⬛⬜⬜⬜⬜⬜ ⬜⬜⬜⬜⬜⬜⬛ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬛⬜⬜⬜⬜⬜⬜ ⬜⬜⬜⬜⬛⬛⬛ ⬜⬛⬜⬛⬛⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬛⬛⬜⬛⬜ ⬛⬛⬛⬜⬜⬜⬜ ⬛⬛⬛⬜⬜⬜⬜ ⬜⬛⬛⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬛⬛⬜ ⬜⬜⬜⬜⬛⬛⬛ ⬛⬛⬛⬜⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬜⬛⬛⬛ ⬛⬛⬜⬜⬜⬜⬛ ⬛⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬛ ⬛⬜⬜⬜⬜⬛⬛ ⬛⬛⬜⬜⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬜⬜⬛⬛ ⬛⬜⬜⬜⬜⬛⬛ ⬛⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬛ ⬛⬛⬜⬜⬜⬜⬛ ⬛⬜⬜⬜⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬜⬜⬜⬛ ⬜⬜⬜⬜⬛⬛⬛ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬜⬜⬜⬛ ⬜⬛⬜⬛⬜⬛⬜ ⬛⬜⬜⬜⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬛⬛⬛⬜⬜⬜⬜ ⬜⬜⬜⬜⬜⬛⬛ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬜⬜⬜⬛ ⬜⬛⬜⬛⬜⬛⬜ ⬛⬜⬜⬜⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬛⬛⬜⬜⬜⬜⬜ ⬜⬜⬜⬜⬜⬜⬛ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬜⬜⬜⬛ ⬜⬛⬜⬛⬜⬛⬜ ⬛⬜⬜⬜⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬛⬜⬜⬜⬜⬜⬜ ⬜⬜⬜⬜⬜⬜⬛ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬜⬜⬛⬛ ⬜⬛⬜⬛⬜⬛⬜ ⬛⬛⬜⬜⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬛⬜⬜⬜⬜⬜⬜ ⬜⬜⬜⬜⬜⬜⬛ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬛⬜⬛⬛ ⬜⬛⬜⬜⬜⬛⬜ ⬛⬛⬜⬛⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬛⬜⬜⬜⬜⬜⬜ ⬛⬛⬛⬜⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬛⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬛ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬜⬛⬛⬛ ⬛⬛⬜⬜⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬛⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬛ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬜⬜⬛⬛ ⬛⬜⬜⬜⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬛⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬛ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬜⬜⬜⬛ ⬛⬛⬜⬛⬜⬜⬜ ⬜⬜⬜⬜⬜⬛⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬛⬜⬜⬜⬜⬜ ⬜⬜⬜⬛⬜⬛⬛ ⬛⬛⬛⬜⬜⬜⬜ ⬜⬜⬜⬛⬜⬛⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬛⬜⬛⬜⬜⬜ ⬜⬜⬜⬜⬛⬛⬛ ⬛⬛⬜⬜⬜⬜⬜ ⬜⬜⬜⬛⬜⬛⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬛⬜⬛⬜⬜⬜ ⬜⬜⬜⬜⬜⬛⬛ ⬛⬛⬜⬜⬜⬜⬛ ⬜⬜⬜⬛⬜⬛⬛ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬛⬛⬜⬛⬜⬜⬜ ⬛⬜⬜⬜⬜⬛⬛ ⬜⬜⬜⬛⬜⬛⬛ ⬜⬛⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬛⬜ ⬛⬛⬜⬛⬜⬜⬜ ⬜⬜⬜⬜⬛⬛⬛ ⬜⬛⬜⬛⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬛⬜⬛⬜ ⬛⬛⬛⬜⬜⬜⬜ ⬜⬜⬜⬜⬜⬛⬛ ⬜⬛⬜⬛⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬛⬜⬛⬜ ⬛⬛⬜⬜⬜⬜⬜ ⬛⬜⬜⬜⬜⬛⬛ ⬛⬛⬜⬛⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬛⬜⬛⬛ ⬛⬛⬜⬜⬜⬜⬛ ⬛⬛⬜⬜⬜⬜⬛ ⬜⬜⬜⬛⬜⬛⬛ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬜⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬛⬛⬜⬛⬜⬜⬜ ⬛⬜⬜⬜⬜⬛⬛ ⬜⬛⬜⬜⬜⬜⬛ ⬜⬜⬜⬛⬜⬛⬛ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬜⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬛⬛⬜⬛⬜⬜⬜ ⬛⬜⬜⬜⬜⬛⬜ ⬜⬜⬜⬛⬜⬛⬛ ⬜⬛⬜⬜⬜⬜⬛ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬜⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬛⬜⬜⬜⬜⬛⬜ ⬛⬛⬜⬛⬜⬜⬜ ⬛⬜⬜⬜⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬛⬛⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬛⬛ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬜⬜⬜⬛ ⬛⬜⬜⬜⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬛⬛⬜⬛⬜⬜⬜ ⬜⬛⬜⬜⬜⬛⬜ ⬜⬜⬜⬛⬜⬛⬛ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬜⬜⬜⬛ ⬛⬛⬜⬛⬜⬜⬜ ⬛⬜⬜⬜⬜⬛⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬛⬜⬜⬜⬜⬛ ⬜⬜⬜⬛⬜⬛⬛ ⬛⬜⬜⬜⬜⬛⬛ ⬛⬛⬜⬛⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬛⬜⬛⬛ ⬛⬛⬜⬜⬜⬜⬛ ⬛⬜⬜⬜⬜⬛⬜ ⬛⬛⬜⬛⬜⬜⬜ ⬛⬛⬜⬛⬜⬛⬜ ⬜⬜⬜⬜⬜⬜⬜ ⬜⬛⬜⬛⬜⬛⬛ ⬜⬜⬜⬛⬜⬛⬛ ⬜⬛⬜⬜⬜⬜⬛