Naoki-Projekt

[fuji]

In Japan, most people exchange handreds of New Year's Cards (we call it "Nenga-jo") as you exchange Christmas cards.
Puzzlers create orizinal puzzle for it.
The following is the Sudoku Problem size 12 by 12 from our's New Year's Card (2010).

At the right side is the character of this year, Tiger.
This is a very easy problem. I hope you solve it without effort.
This problem is made by the program.
Naoki found the alglithm and Masaya Kimada(International collegiate programming contest, world final member of Japan) wrote a quite unique program.
This probram made many sudoku problems for Puzzle Magazines and Sudoku Books in Japan.