Last Update: Tue Oct 24 02:09:06 +0530 2006

Sudoku (Numbers Solitary) puzzle

Snapshot (Sudoku)

Sudoku (Numbers Solitary) puzzle game, implemented in pure Ruby, just a two days (exactly 16 hours) of work. At present ANSI-console interface only, but I may add GUI using GTK2, QT and, or any other suitable library.


"Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9."

That‘s all there is to it.

There‘s no math involved. The grid has numbers, but nothing has to add up to anything else. You solve the puzzle with reasoning and logic.

It‘s fun. It‘s challenging. It‘s addictive!

Solving time is typically from 10 to 30 minutes, depending on your skill and experience. Please note that every Sudoku puzzle has just one correct solution.


n:New game
r:Redraw board
j|UpArrow:Move Up
k|DownArrow:Move Down
h|LeftArrow:Move Left
l|RightArrow:Move Right
m:Mark (pencil mode)
1 .. 9:Fill number



  1. Requires ANSI.SYS driver on Mircosoft Windows and, or DOS.
  2. Some links on this page go to sites that are completely out of our control. Therefore we dissociate from their content explicitely and will remove the links in case we‘re informed about any illegal activities on that pages as far as the effort to do that is reasonable for us.




Any contribution of yours, although howsoever small it may be, shall highly be appreciated; for further development of this and, or many other F/LOSS (Free/Libre Open Source Software) Projects.


Copyright (C) 2005-2007 by Dr Balwinder Singh Dheeman. Distributed under the GNU GPL ( See the files "COPYING" and, or "Copyright" , supplied with all distributions for additional information.


Balwinder Singh Dheeman <>

 $Id: README,v 1.7 2007/01/24 07:49:42 bsd Exp $