# Logic for developing strategies in hypersudoku

### The rules for playing hypersudoku are very simple.

1. All rows must have all the numbers from 1 - 9 in them. (none can be repeated) There are 9 rows in the game.

2. All colums must have all the numbers from 1 - 9 in them. (none can be repeated) There are 9 colums in the game.

3. All squares must have all the numbers from 1 - 9 in them. (none can be repeated) There are 13 squares in the game.

## New GameThis is the first of a series of pages on Hypersudoku game logic for new comers and complete beginners. This logic is necessary to develop your strategies for the game of hypersudoku.As you will see in the following diagrams there are many starting points for the game in figure 1. This is a fairly typical layout for an easy level hypersudoku game. These are only a few of the many starting points in this particular game. |
Figure 1 |

## Example 1Looking at the center square we can see that colum 4 has a 9 at the bottom(circled in red). This means that a nine can not appear again in this colum. Colum 5 also has a 9 in it. This time up in the top middle square.This leaves colum 6 as the only option for a 9 to appear in the center square. As 6 and 4 take up 2 of the 3 squares available, there is only one square left. This is the one with the blue tick in it. This square will contain the 9. |
Figure 2 |

## Example 2In figure 3 if we look at the top right square, we can see that rows 2 and 3 already have a 5 (circled in red) in them.This leaves the square with the blue tick as the only possibility for a 5 in this square. |
Figure 3 |

## Example 3Again the same starting game, but this time looking at the middle right square. Rows 4 and 6 contain a 4 already, leaving only row 3.As the other 2 squares already contain numbers, the square with the blue tick is the only square that can contain a 4. |
Figure 4 |

## Example 4In figure 5 we can see that the top row and third row already have a 6 in them. The sixth colum also has a 6 in it.This leaves the square with the blue tick as the only square that could contain a 6 in this block. |
Figure 5 |

## Example 5If we look at the bottom center square we can see that colums 5 and 6 both contain a 5 (circled in red).This leaves only one square in this block that can contain a 5.(square with blue tick) |
Figure 6 |

## Example 6In figure 7 we see that colum 1 and 2 have a 2 in them already. Also note that row 5 has a 2 in it. (circled in red)Again this only leaves the square with the blue tick in it as the only possible square in this block that could contain a 2. |
Figure 7 |

As you can see there are many possible first moves to start the game of hypersudoku. These are certainly not the only starting moves for this particular game.

If you would like to try playing a game just click on this link.

# Play Now

The images used in this article are public domain and may be redistributed.