# 2D-Sudoku

## The puzzle

Fill every row, every column and each of the two diagonals – if indicated – with numbers from 1 to SIZE of the grid. Here’s a little self-explanatory example:

## Options

• rows (5)
defines the number of rows in the grid

• columns (5)
specifies the number of columns in the grid

• width (5.1cm)
sets the width of the minipage, in which the grid is typeset

• scale (1)
scales the size of the grid in the minipage

• fontsize (Large)
specifies the size of the numbers next to the grid. Here, the usual LaTeX sizes are used. Possible values: tiny, scriptsize, footnotesize, small, normalsize, large, Large, LARGE, huge, Huge

• title ()
sets the title of a puzzle

• titleindent (0cm)
defines the indent of the title

• titlewidth (5.1cm)
specifies the width of the box the title is set in

• bgcolor ()
sets the background color of the grid

• counterstyle (none)
defines the counter style. Predefined styles: none, left, right

• cvoffset (-22pt)
sets the vertical offset of the counters in the margin

## Environments

### ddsudoku

The ddsudoku environment is the central core of the style file. With the optional argument of the environment, you can reset the options with local scope. Here, a blank grid is created.

## Commands

### In the grid and around

#### ddsudokucell

\ddsudokucell{column}{row}{number}

The command sets the {number} of the grid cell {column}{row}.

#### setrow

\setrow{row}{csv list}

The command sets the contents of {row}. It expects a comma-separated list.

#### setcolumn

\setcolumn{column}{csv list}

The command sets the contents of {column}.

#### filldiagonals

\filldiagonals[color]

With the \filldiagonals command, you can fill the diagonals with the color specified with the optional argument color (default: yellow!20). Furthermore, it checks for a quadratic grid, otherwise an error message is issued.

#### framepuzzle

\framepuzzle[color]

With the \framepuzzle command, you can frame the grid (thicker line) with the color specified with the optional argument color (default: black).

### Presentation

#### definecounterstyle

The command allows you to define your own styles. For example, the style
left is defined as follows:

To typeset the counter into the margin we use the command \marginnote. We need to use the command \reversemarginpar to set the counter into the left margin. Of course, we must use this command in a group for local scope. Finally we use \puzzlecounter in a \tikz node with a vertical offset set with the option cvoffset.

#### puzzlecounter

\puzzlecounter

The command provides the counter in textual form to use it for example in \definecounterstyle.

#### titleformat

\titleformat{format}

With the command \titleformat, you can define the format of the title. By default, the definition is as follows:

\titleformat{\centering\Large\color{blue}}

### Miscellaneous

#### ddsudokusetup

\ddsudokusetup{options}

With the command \ddsudokusetup you can reset the options with global scope.

#### setpuzzlecounter

\setpuzzlecounter{number}

With the command \setpuzzlecounter, you can reset the puzzle counter, for example before the solutions.

## Examples & Solutions

You can download application examples and their solutions from the project page. The puzzles are originally licensed under CC-BY-NC-SA.

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