Kakuro Nichiyou PSP v1.1 is described by its developer MK2k as the younger brother of the very popular Sudoku puzzle. Kakuro, to most people, is the math version of the newspaper crossword.

Gameplay is simple as well. You will just set numbers in the free spaces. But knowing where to set those numbers is a different story. So good luck with that. You can put in small numbers from one to nine to help you out, something like playing the crossword with a pencil.

Puzzlemakers all over the world contributed to the 234 hand-picked and created puzzles for Kakuro Nichiyou. That's a lot of puzzles to go around. You can save your game under twenty save slots. And if you're at your wit's end, MK2k installed a problem solver - but only for 203 out of the 234 available ones.