I do a crossword (from the same site) over breakfast. Some days it's easy from the start, and I know I'm already firing on all cylinders. Other days it's a slow

I do a crossword (from the same site) over breakfast. Some days it's easy from the start, and I know I'm already firing on all cylinders. Other days it's a slow start, but by the end I've mentally limbered up. I think Sudoku, Wordle, most mental puzzles, have a similar value.