So if you like to play Sudoku, you might want to check out and download a copy of jsiSudoku to play.
Post Script for techies only:
This is written in C++ with Visual C++ Express Edition 2008. It uses direct win32 API calls, no MFC, no ATL, no other framework. That's the reason it is so small.
Coding in pure C++ with win32 is quite an interesting experience - perhaps I'll blog about that sometime.