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9x9 Jigsaw Sudoku
9x9 Jigsaw Sudoku

JIGSAW SUDOKU

Jigsaw Sudokus, also known as Nonomino Sudokus, are a variation of the classic Sudoku with irregular boxes arranged in patterns.

These patterns allow the player to solve numbers in a harmonious flow and develop new, unexpected strategies that are unique to this Sudoku variant.

Terms

9x9 Jigsaw Sudoku with an individual pattern
9x9 Jigsaw Sudoku with an individual pattern

Boxes

The difference to Classic Sudoku can be found in the boxes. For example, while a 9x9 Classic Sudoku always has boxes as a 3x3 grid, in the Jigsaw variant they have a free form.

They are arranged as a pattern in which individual box shapes can be repeated.

9x9 Jigsaw Sudoku with an individual pattern
9x9 Jigsaw Sudoku with an individual pattern

Boxes

The difference to Classic Sudoku can be found in the boxes. For example, while a 9x9 Classic Sudoku always has boxes as a 3x3 grid, in the Jigsaw variant they have a free form.

They are arranged as a pattern in which individual box shapes can be repeated.

Variants

In One Sudoku you will find a large number of different handmade patterns. These are available in 7x7, 9x9 and 11x11 board sizes. The largest of the three variants is available on devices with large screens.

In One Sudoku you will find a large number of different handmade patterns. These are available in 7x7, 9x9 and 11x11 board sizes. The largest of the three variants is available on devices with large screens.

7x7 Jigsaw Sudoku
7x7 Jigsaw Sudoku
9x9 Jigsaw Sudoku
9x9 Jigsaw Sudoku
11x11 Jigsaw Sudoku
11x11 Jigsaw Sudoku

Rules

Despite the irregularly shaped boxes, Jigsaw Sudokus follow the standard rules for Sudoku puzzles. These can be found in the Classic Sudoku Game Guide. Before following the solution steps here, it is recommended that you first familiarize yourself with these rules and terms.

Despite the irregularly shaped boxes, Jigsaw Sudokus follow the standard rules for Sudoku puzzles. These can be found in the Classic Sudoku Game Guide. Before following the solution steps here, it is recommended that you first familiarize yourself with these rules and terms.

Solving Steps

7x7 Jigsaw Sudoku Starting Point

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7x7 Jigsaw Sudoku Starting Point

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Step 1

In this game tutorial we will solve a 7x7 Jigsaw Sudoku together. In doing so, we'll go over some of the special features that result from the pattern shapes of the boxes.

7x7 Jigsaw Sudoku Starting Point

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7x7 Jigsaw Sudoku Starting Point

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Step 1

In this game tutorial we will solve a 7x7 Jigsaw Sudoku together. In doing so, we'll go over some of the special features that result from the pattern shapes of the boxes.

7x7 Jigsaw Sudoku solution step 2

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7x7 Jigsaw Sudoku solution step 2

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Step 2

First, we can turn our attention to the number 4. This is already reduced to two possibilities by the 4 of the box marked in the example and by the fours in cells C7 and G3 for the two boxes with the same pattern to the left and right of the marked box. We can note these two possible positions of the 4.

7x7 Jigsaw Sudoku solution step 2

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7x7 Jigsaw Sudoku solution step 2

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Step 2

First, we can turn our attention to the number 4. This is already reduced to two possibilities by the 4 of the box marked in the example and by the fours in cells C7 and G3 for the two boxes with the same pattern to the left and right of the marked box. We can note these two possible positions of the 4.

7x7 Jigsaw Sudoku solution step 3

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7x7 Jigsaw Sudoku solution step 3

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Step 3

Through these notes we see that the 4 for column 2 and row 2 is already assigned. This allows us to enter the 4 in cell A1 as the last option in the upper left box.

7x7 Jigsaw Sudoku solution step 3

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7x7 Jigsaw Sudoku solution step 3

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Step 3

Through these notes we see that the 4 for column 2 and row 2 is already assigned. This allows us to enter the 4 in cell A1 as the last option in the upper left box.

7x7 Jigsaw Sudoku solution step 4

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7x7 Jigsaw Sudoku solution step 4

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Step 4

Let's continue with the 5. Due to the special shape of the three middle boxes, we can first enter the 5 for line 4 in the right middle box. This locks it for the left middle box in the same row. Since the 5 is also locked in row 6 by the default in cell F6, we can enter the 5 in the middle of the box highlighted in the example in cell B5.

7x7 Jigsaw Sudoku solution step 4

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7x7 Jigsaw Sudoku solution step 4

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Step 4

Let's continue with the 5. Due to the special shape of the three middle boxes, we can first enter the 5 for line 4 in the right middle box. This locks it for the left middle box in the same row. Since the 5 is also locked in row 6 by the default in cell F6, we can enter the 5 in the middle of the box highlighted in the example in cell B5.

7x7 Jigsaw Sudoku solution step 5

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7x7 Jigsaw Sudoku solution step 5

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Step 5

With the found 5, we can now reveal all the remaining fives in the puzzle.

7x7 Jigsaw Sudoku solution step 5

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7x7 Jigsaw Sudoku solution step 5

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Step 5

With the found 5, we can now reveal all the remaining fives in the puzzle.

7x7 Jigsaw Sudoku solution step 6

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7x7 Jigsaw Sudoku solution step 6

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Step 6

We can reveal the ones at A3 and F4 because they are the last remaining possibilities in their respective boxes.

7x7 Jigsaw Sudoku solution step 6

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7x7 Jigsaw Sudoku solution step 6

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Step 6

We can reveal the ones at A3 and F4 because they are the last remaining possibilities in their respective boxes.

Step 7

Due to the shape of the highlighted box, we can enter the 6, which is hidden in line 7, in cell A5. In addition, the 6 can still be solved at B2 and E4 and subsequently at C7.

Step 7

Due to the shape of the highlighted box, we can enter the 6, which is hidden in line 7, in cell A5. In addition, the 6 can still be solved at B2 and E4 and subsequently at C7.

7x7 Jigsaw Sudoku solution step 7

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7x7 Jigsaw Sudoku solution step 7

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7x7 Jigsaw Sudoku solution step 7

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7x7 Jigsaw Sudoku solution step 7

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Step 8

We can now enter the pair 3 and 7 for A4 and C4. Because 7 is the last number to be revealed for A4, we already know what the solution is. In this step, however, we will deal with a special property of the Jigsaw Sudoku.

Because the 7 is locked in the lines 2 and 4, we can enter it in the box right in the middle directly at F3. This is favored by the shape of this box. Similar examples can be found in all Jigsaw patterns. If you are careful to use these possibilities, the patterns can serve you well in solving them.

Step 8

We can now enter the pair 3 and 7 for A4 and C4. Because 7 is the last number to be revealed for A4, we already know what the solution is. In this step, however, we will deal with a special property of the Jigsaw Sudoku.

Because the 7 is locked in the lines 2 and 4, we can enter it in the box right in the middle directly at F3. This is favored by the shape of this box. Similar examples can be found in all Jigsaw patterns. If you are careful to use these possibilities, the patterns can serve you well in solving them.

7x7 Jigsaw Sudoku solution step 8

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7x7 Jigsaw Sudoku solution step 8

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7x7 Jigsaw Sudoku solution step 8

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7x7 Jigsaw Sudoku solution step 8

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7x7 Jigsaw Sudoku solution step 9

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7x7 Jigsaw Sudoku solution step 9

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Step 9

Another example of how the patterns favor the solution can be found starting from the only given 2 in cell A7. If we follow line 7 to the right, we can note 2 in the lower right box at F6 and G6 as a possibility.

This in turn allows us to follow line 6 back to the left and find that for the middle box, the only remaining possibility is for the 2 in cell C3.

This also allows us to enter the 2 in the selected cell B1.

7x7 Jigsaw Sudoku solution step 9

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7x7 Jigsaw Sudoku solution step 9

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Step 9

Another example of how the patterns favor the solution can be found starting from the only given 2 in cell A7. If we follow line 7 to the right, we can note 2 in the lower right box at F6 and G6 as a possibility.

This in turn allows us to follow line 6 back to the left and find that for the middle box, the only remaining possibility is for the 2 in cell C3.

This also allows us to enter the 2 in the selected cell B1.

7x7 Jigsaw Sudoku solution step 10

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7x7 Jigsaw Sudoku solution step 10

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Step 10

By revealing the 7 at D5 as the last possibility in this column, we can also put the 3 at E5.

As another peculiarity of Jigsaw Sudokus, this 3 for the box at the bottom right now obscures both the 3 in column E and in row 5 and we can enter it in the last remaining possibility in this box at G7.

7x7 Jigsaw Sudoku solution step 10

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7x7 Jigsaw Sudoku solution step 10

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Step 10

By revealing the 7 at D5 as the last possibility in this column, we can also put the 3 at E5.

As another peculiarity of Jigsaw Sudokus, this 3 for the box at the bottom right now obscures both the 3 in column E and in row 5 and we can enter it in the last remaining possibility in this box at G7.

7x7 Jigsaw Sudoku solution step 11

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7x7 Jigsaw Sudoku solution step 11

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Step 11

By using classic Sudoku rules, we can uncover all the other threes and thus completely solve the box in the center right by using the possibilities we have already noted.

7x7 Jigsaw Sudoku solution step 11

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7x7 Jigsaw Sudoku solution step 11

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Step 11

By using classic Sudoku rules, we can uncover all the other threes and thus completely solve the box in the center right by using the possibilities we have already noted.

7x7 Jigsaw Sudoku solution step 12

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7x7 Jigsaw Sudoku solution step 12

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Step 12

We can solve all further numbers by applying the strategies for classic Sudoku puzzles. With that, this Jigsaw Sudoku is completely solved.

7x7 Jigsaw Sudoku solution step 12

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7x7 Jigsaw Sudoku solution step 12

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Step 12

We can solve all further numbers by applying the strategies for classic Sudoku puzzles. With that, this Jigsaw Sudoku is completely solved.

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