Sudoku Navigator

You can find some arrows in Sudoku Navigator which helps you to solve the puzzle.
The arrows show the location of the same number in the previous or next column or row.
The upper and lower arrows show left or right. The left and right arrows show up or down.
There are several cells with more than one arrow.
The upper arrow connected to the previous row. The lower arrow connected to the next row.
The left arrow connected to the previous column. The right arrow connected to the next column.


Tips:
If you solve a cell with at least one arrow, check the previous/next column/row. Maybe the same number could be fill only one empty cell in the direction of the arrow.
If you fill any cell check neighboring rows and columns, maybe the same number could be fill only one empty cell which has an arrow showing the right direction.
Do not forget the classic sudoku rules in each row, in each column in each 3x3 range each numbers appears exactly once.

 In the upper middle range the lower arrow of 5 shows to left. In the middle middle range the upper arrow of 5 shows to right.

In the middle middle range the left arrow of 8 shows up. In the upper left range the right arrow of 8 shows down.


Sudoku Points

The points in the cells reflect to the remainder of the number in the cell divided with 3. One point means remainder is 1. Two points mean the remainder is 2. Three points mean the number in the cells can exactly divided with 3 with no remainder. If there is no point in the cell you can fill any number between 1 and 9.

Tips:
In the cells marked with 1 point 1, 4 and 7 can be filled in. In case of two points only 2, 5 and 8 allowed. Three points mean that the number in the cell could only be 3, 6 or 9.
If there is no point in the cell, use the following Tips:
In a row or a column there must be three cells with 1 point, three cells with 2 points and three cells with 3 points. The same hint works on a 3x3 range.
Do not forget the classic sudoku rules in each row, in each column in each 3x3 range each numbers appears exactly once.

 In the middle right range one out of the two cells with no points should have 3 points ant the other should have 2 points. In this range there are three cells with 1 point, two cells with 2 points and two cells with 3 points currently.
In the last column there are already three cells with 3 points therefore in this column only the cells with 2 points can be placed.


Sudoku Diagonal

In this variant the numbers next to the sudoku table shows the sum of the numbers in the diagonal. Different colors help you to separate the diagonals. You do not have to use all the summary numbers there are several way to solve the puzzle.


Tips:
Start with the sorter diagonals.
Do not forget that all cells located in two diagonals.
If a diagonal crosses only one 3x3 range the numbers in the diagonal must be different. If the diagonal crosses two or three 3x3 ranges then you are allowed to fill the same number 2 or 3 times in a diagonal.
Do not forget the classic sudoku rules in each row, in each column in each 3x3 range each numbers appears exactly once.

 Fill the four corners first.

Less variation in the short diagonal. 11 (marked with blue) can be 9+2, 8+3, 7+4, and 6+5. In the lower left range 2 and 3 have already placed therefore 9+2 and 8+3 are out. In column B 5 and 6 have already placed therefore 6+5 is out. 7+4 is the only available variation. B9=4, A8=7.


Sudoku Sum

The values next to the sudoku table show the sum of the numbers in the three closest cells from the column, row or main diagonal. Different colors help you to separate the sums. You do not have to use all the summary numbers there are several way to solve the puzzle


Tips:
The sum of three different numbers is minimum 3 maximum 24. Start with the small and big amounts, there are less variations.
The sum of the 3 middle cells in a row can be calculated. (1+2+3+4+5+6+7+8+9=45)
45 minus the sum of the three left cells minus the sum of the 3 right cells. The same rule works for the columns but NOT for the main diagonals.
Do not forget the classic sudoku rules in each row, in each column in each 3x3 range each numbers appears exactly once.

 Fill the four corners first.

The sum of the cells marked with blue is 4. Only 1+3 possible. In the second row there is a 3 already

The value of the cell marked with red can be calculate in the following way:
1+2+3+4+5+6+7+8+9=45
45-10-22=13
13-8-1=5


Sudoku Min&Max

In Sudoku Min&Max several arrow helps you to solve the puzzle. The arrows always give information about those 3x3 ranges in which located. There are 2 different types of arrow.

- Arrow in the corner shows up: the cell in which the arrow located is the maximum out of the 4 corners
- Arrow in the corner shows down: the cell in which the arrow located is the minimum out of the 4 corners
- Inner arrow shows up: the cell in which the arrow located is the maximum out of the 4 connected cells.
- Inner arrow shows down: the cell in which the arrow located is the minimum out of the 4 connected cells.
- The arrows show up marked with blue, the arrows show down marked with red color.

Corner cells

Inner cells


Tips:
If there is a 2 or an 8 in any range try to find the 1 and the 9 in the same 3x3 range.
1, 2 or 3 cannot be placed in a cell where an arrow shows up located. 7, 8 or 9 cannot be placed in a cell where an arrow shows down located.
It is easier to start with the smallest and the biggest numbers (1 and 9) then it is recommended to continue step by step (2 and 8 then 3 and 7 and finish with 4, 6 and5).
Do not forget the classic sudoku rules in each row, in each column in each 3x3 range each numbers appears exactly once.


Sudoku Difference

In this variant numbers between two cells helps you to solve the puzzle. The numbers shows the difference between the two connecting cells.
You do not have to use all the numbers to solve the puzzle. There are several ways to solve the puzzle, but more information you have easier to solve.


Tips:
Start with the big differences, in these cases there are less variations. If the difference between the cells is 8, it can be only 1 and 9 in the connecting cells. If the difference is 7 there are only two options: 9 and 2 or 1 and 8.
If you solve one number in a 3x3 range it is recommended to solve all the other cells in the same range.
Do not forget the classic sudoku rules in each row, in each column in each 3x3 range each numbers appears exactly once.

 The value in the cells marked with red can only be 5+-1 (4 or 6) and 5+-2 (3 or 7).

The cells marked with blue only 1 and 9 can be placed.


Sudoku Hi-Med-Low

In this variant a horizontal and a vertical marker helps you to solve the puzzle. The markers can be 1 or 2 or 3 short lines.The markers always reflect on 3 horizontally or vertically connecting cells within the 3x3 range. Horizontal markers reflect on 3 cells in a row, vertical markers reflect 3 cells in a column. 1 marker means that this is the smallest value in the marked column or row whitin the 3x3 range. 2 markers mean that this is the medium value out of 3 cells in the marked column or row whitin the 3x3 range. 3 markers mean that this is the largest value in the marked column or row whitin the 3x3 range.
You do not have to use all the markers to solve the puzzle. There are several ways to solve the puzzle, but more information you have easier to solve.


Tips:
9 can be placed only to a cell marked with 3 horizontal and 3 vertical markers.
1 can be placed only to a cell marked with 1 horizontal and 1 vertical markers.
8 can be placed only to a cell where the sum of the horizontal and vertical markers is minimum 5.
2 can be placed only to a cell where the sum of the horizontal and vertical markers is maximum 3.
Do not forget the classic sudoku rules in each row, in each column in each 3x3 range each numbers appears exactly once.


Vertical markers reflect on the 3 verticaly connected cells.




Horizontal markers reflect on the 3 horizontaly connected cells.


Sudoku High&Low

In this variant you can find two small numbers in each cell. These numbers reflect on the neighbouring cells. If the cell in the corner of the table than the numbers reflect on 3 neighbouring cell. If it is at the boundary of the table the numbers reflect on 5 cells. If the cell in the 'niddle' part of the sudoku table, then the numbers reflect on 8 cells.
The upper number in the cells reflects on that how many neighbouring value are bigger than the value in the cell.
The lower number in the cells reflects on that how many neighbouring value are smaller than the value in the cell.
You do not have to use all the values to solve the puzzle. There are several ways to solve the puzzle, but more information you have easier to solve.


Tips:
Start with the cells in the middle of the 3x3 ranges. It can be easily calculate. If the cells not in the middle of any 3x3 range then it is possible there are same values in the neighbouring cells. If the sum of the small upper and lower number is not equal to 8 it means that there are same values in the neighbouring cells Do not forget the classic sudoku rules in each row, in each column in each 3x3 range each numbers appears exactly once.

Cells in the 'middle' part. The small numbers reflect on 8 neighbouring cells.

Cells at the corner. The small numbers reflect on 3 neighbouring cells.

Cells at the boundary. The small numbers reflect on 5 neighbouring cells.



Sudoku Blocks

In this variant there block houses in each cell of sudoku table. The height of the house is equal to the number of the cell . The numbers in the surrounding cells show how many houses can be seen from the thatg direction in the column or row. The smaller house behind the higher cannot be seen.
Numbers in the corner reflect only on 3 diagonal cells.
You do not have to use all the values to solve the puzzle. There are several ways to solve the puzzle, but more information you have easier to solve.


Tips:
Start where only 1 house can be seen. 9 is the highest house. Please remember thet numbers at the corner reflect only on 3 diagonal cells. Maybe not all the numbers are different within the two main digonals.
Do not forget the classic sudoku rules in each row, in each column in each 3x3 range each numbers appears exactly once.


Numbers in the corner reflect only on 3 cells marked with yellow.



Sudoku Pairs

In this variant 2 cells are connected with a line within a 3x3 range. There are four pairs within the 3x3 range. The sum of the connected paris is 10.
You do not have to use all the values to solve the puzzle. There are several ways to solve the puzzle, but more information you have easier to solve.


Tips:
Fill 5 to each cell. 5 has no pair.
If you fill a cell with a number you can immidiately fill it's pair too. Do not forget to eliminate those numbers which pair is not fit to the column or row.
Do not forget the classic sudoku rules in each row, in each column in each 3x3 range each numbers appears exactly once.


Sometimes pairs connected in the 'background'. Plese see the examples colors help you to understand how the pairs pairs are connected.



Sudoku Cross&Plus

There are one or two values in the bottom part of the cells. These numbers reflect on the sum of the numbers in the surrounding cells. The number after the 'x' is equal to the sum of the cornerly connected cells.The number after the '+' is equal to the sum of the sidely connected cells.
You do not have to use all the values to solve the puzzle. There are several ways to solve the puzzle, but more information you have easier to solve.


Tips:
Start with the corner. There is only one cornerly connected neighbour cell.
Cells aT the boundary of the sudoku table is easier to solve because they heve less neighbouring cells. Do not forget the classic sudoku rules in each row, in each column in each 3x3 range each numbers appears exactly once.

Generally both 'x' value and '+' vale reflect on four cells but at the boundary of the sudoku table they reflect only 1, 2 or 3 cells.


Sudoku Domino

You have to use dominos to fill the sudoku table. You have to fill the two numbers of each domino. Small numbers show the sum of the two numbers on the dominos. It is not aqllowed to use double dominos (1-1, 2-2, ... 9-9) but you can use any dominos as many time as you wish.
You do not have to use all the values to solve the puzzle. There are several ways to solve the puzzle, but more information you have easier to solve.


Tips:
It is easy to calculate the center cell of a 3x3 range. 1+2+3+4+5+6+7+8+9=45. 45 divide the sum of the four dominos within the 3x3 range eguals to the center cell number.
Start with the small or big values. Less variation easier to solve.
Do not forget the classic sudoku rules in each row, in each column in each 3x3 range each numbers appears exactly once.


Calculate the center cell value.


Start with small (3, 4 or 5) or big (17, 16, 15) values.



Sudoku Compass

Several compass arrow helps you to solve this sudokue puzzle. There are 3 different types of arrows. The description of the aroow is below.


A first do not focus on the colors, concentrate only on the arrows.
Type1 arrows show to the direction of cell wich has the highest value out of the sidely connected cells within the 3x3 range.
Type2 arrows show to the direction of cell wich has the smallest value number out of the sidely connected cells within the 3x3 range. Type 2 arrow only appears if type1 is not applicable bacause the cell is the local maximum.
Type3 arrows reflect on the three verticaly or horzontaly connected cells at the boundary of sudoku table. Down arrow means this is the smallect value out of the 3 cells. Up arrow means this is the largest value out of the 3 cells.
You do not have to use all the values to solve the puzzle. There are several ways to solve the puzzle, but more information you have easier to solve.

Type3 arrows and connected values:


Color coding also helps you to solv the puzzle. Red is 1-3, grey is 4-6, blue is 7-9.

Tips:
Start with 9 than continue with 8 and 7.
Color coding is a very helpful thing.
Do not forget the classic sudoku rules in each row, in each column in each 3x3 range each numbers appears exactly once.

Please see the examples carefully before you start to solve the puzzle.
This is one of the most complex sudoku puzzles, it is important to understand the rules clearly.


Sudoku Matrix

The numbers next to sudoku table means that the marked numbers must located in the in the 3 closest celss in the same row or column. Numbers at the corner reflect on the 3 cell diagonal in that 3x3 range which is located in the corners.
There is no two digit numbers, 85 must split to one digit numbers. 8 and 5 must be in the top 3 cells of the first column.
You do not have to use all the values to solve the puzzle. There are several ways to solve the puzzle, but more information you have easier to solve.


Tips:
Fill the matrix. If the same number market in tho columns and rows (or diagonal) within the range, it must be located in the crossing.
Start with the 2 digit numbers. More information easyer to solve.
The 3x3 ranges at the corners have additional information about the diagonal cells.
Do not forget the classic sudoku rules in each row, in each column in each 3x3 range each numbers appears exactly once.


Top left range: locate 7. Upper right range: locate 3. Lower right range: locate 8.



Sudoku Sum2 (Sudoku Sum Around)

The small numbers in the sudoku table (in the bottom patr of the cells) equals to the sum of the surrounding cells.
The outside yellow number at the corner equals to the sum of closest four yellow cells containing area.
The outside light blue number in the middle of the side equals to the sum of the 3 cells marked with light blue.
You do not have to use all the numbers to solve the puzzle. There are several ways to solve the puzzle, but more information you have easier to solve.


Tips:
STart with the center of the range. The sum of a range is always 45. If you divide the small number result in the value of the center cell.
Use the information what color parts give you.
There are less variations at the boundary of the sudoku table (less connecting cells).
Do not forget the classic sudoku rules in each row, in each column in each 3x3 range each numbers appears exactly once.


Less connected cells at the boundary - less variation.


Sum of yellow area shown at the corners.


Sum of 3 side cells shown outsde the sudoku table in the light blue cell.