Irregular

Some people seem fixated on Inuit people having many words for snow, but English does too! From blizzard to whiteout, with flurries, graupel, and drifts, we have so many words. The one this puzzle’s palindrome lines make me think of is sleet.

I regularly publish 9x9 Sudoku puzzles filled with 3x3 blocks of cells, but this one isn’t regular at all. It’s an Anti-Knight Irregular Sudoku!