Sudoku Puzzle ver. 2.1
----------------------
Pavel Zampach (zampach@volny.cz), 2005


History
-------
2.1  PocketDos compatible
2.0  used puzzle database (SUDOKU.DAT) instead of simple 
generator, facility of typing new puzzles
1.1  bugfixed release
1.0  first public version


Thank
-----
* Curtis Cameron for his excellent graphic libraries
* Tom Almy for ForthCMP compiler


Installation
------------
is very simple. Copy file SUDOKU.EXE and SUDOKU.DAT to desired 
directory and place link into AppManager or another launcher. 
Needed space is about 64K. Program has to be launched from 
actual directory.
File SUDOKU.DAT contains about 160 quality puzzles 
(symmetrical, with one solution).


Playing
-------
1-9       	enter number into grid
Arrows		moves cursor
F1		help
F2 or <-   	back
F4		mark current position
F5		go to marked position
F6		switch on/off displaying of possible numbers 
		under cursor
F10       	exit game

If game is interrupted (F10), you can save game and history 
into file (SUDOKU.HST). On next start of program is this loaded 
and game continues.


Typing new puzzle
-----------------
1-9       	enter number into grid
Arrows		moves cursor
space or <-	erase number under cursor
F9		end of typing and saving typed puzzle into 
		SUDOKU.DAT
F10		end of typing without saving


Game
----
The point of the game is to fill all the grid with numbers 1 up 
to 9. You will notice that the big grid has dimensions 9x9. 
This board is separated into 9 smaller boards of 3x3. Wihtin 
the 3x3 board ALL numbers from 1 to 9 must be placed. The same 
number cannot appear in the same column or in the same row. All 
numbers from 1 to 9 must appear within each row and each 
column.
