ZX Sudoku
                            =========

A 4k minigame for the Spectrum 48k/128k
Entry for the 2005 Minigame Compo (http://www.ffd2.com/minigame/)


By Paolo Ferraris   (pieffe8.at.libero.it)

Thanks to the Italian Zx Spectrum mailing-list for testing


The game has NOT been tested on a real machine, but on two of the most
accurate emulators available, and those Spectrum emulators usually emulate
the real machine faithfully.

If you have troubles running the game,

* try to emulate the Spectrum 128k. Some 128k clones may be good as well.
* after a reset,  select TAPE LOADER at the starting menu
* try to remove all additional hardware from your computer. The game does
  not work with hardware such as microdrives, and others which like to write
  on the floating bus...


This is an implementation of the sudoku game.
There is a 9x9 grid, divided into nine 3x3 sectors. Some cells already contain
numbers from 1 through 9. The goal is to fill the other cells with numbers from
1 through 9 in such a way that every line, every column and every 3x3 sector
contains every digit 1-9, without repetitions.


Controls:

QAOP move the cursor.
1-9: insert a digit
CAPS+ 1-9: insert/remove a small digit. You can write more than 1 small digit
per cell. Small digits can be understood as notes, and not the final choice for
a digit. (On the emulator called Spectaculator, CAPS is the left caps shift on
the PC keyboard; on other emulators that may differ.)
SPACE: erases the content of a cell
N: next puzzle. There are 6 puzzles. Every puzzle has a unique solution

The border of the screen is normally black. If you complete the puzzle
successfully it becomes white. A red border denotes a filled board with errors.


I hope you will enjoy this minigame.

Comments and suggestions are welcome