CalcuDoku CalcuDoku CalcuDoku

CalcuDoku

KNS Puzzles offers the CalcuDoku puzzles in the following formats:
4 x 4 - Level 1 - Level 2 - Level 3
5 x 5 - Level 1 - Level 2 - Level 3
6 x 6 - Level 1 - Level 2 - Level 3
7 x 7 - Level 1 - Level 2 - Level 3
8 x 8 - Level 1 - Level 2 - Level 3
9 x 9 - Level 1

Complete the grid such that every row and column contains the digits 1 to the size of the grid. Each row and column contains each digit only once. A cage clue tells you the answer after the cage values have undergone the specified mathematical operation. The clue doesn't tell you which way around the digits occur, just the answer to the calculation. A digit can appear more than once in a cage.

CalcuDoku Puzzle Start

Puzzle Start

This is the start of the puzzle. This puzzle has a number of different solution methods, see if you can find another way of solving it.

CalcuDoku Step 2

Step 2

The only way to make 12 in two squares using multiplication is 3 x 4.

CalcuDoku Step 3

Step 3

The only way to make 4 in two squares using multiplication is 1 x 4 (as we can't have two 2's in the row).

CalcuDoku Step 4

Step 4

The only way to make 7 in three squares using addition is 1 + 2 + 4.

CalcuDoku Step 5

Step 5

As we know where the <1>, <2> and <4> of Row 1 are, we know that this square is <3>.

CalcuDoku Step 6

Step 6

As this cage must equal 2 under subtraction, it must be 3 - 1, which makes this square <1>.

CalcuDoku Step 7

Step 7

Neither of these squares can contain <4>. This is because the 12x clue in this column MUST contain the <4>.

CalcuDoku Step 8

Step 8

Removing <4> on the previous step forced the <1> of this cage, which makes this square the <4>.

CalcuDoku Step 9

Step 9

As we now know where the <1> for this column is, we can remove it from this square leaving the <2>.

CalcuDoku Step 10

Step 10

As we now know where the <2> from Row 1 and the <4> for Column 1 are we can remove both of these from this square leaving <1>.

CalcuDoku Step 11

Step 11

Row 1 is only missing its <4>, and that must go in this square.

CalcuDoku Step 12

Step 12

This square can only be <2> as the other numbers are either in Row 4 or Column 4.

CalcuDoku Step 13

Step 13

Both of these numbers are forced as each only has one number left in the Row or Column.

CalcuDoku Step 14

Step 14

As we know where the <4> for Row 3 is, we can remove it from this leaving the <3>, which forces the remaining square in Column 2 to be <4>.

CalcuDoku Step 15

Step 15

This square can only be <2> as all other numbers already occur in the row or column.

CalcuDoku Step 16

Step 16

These squares are now forced as each only has one number left in the row or column.

CalcuDoku Step 17

Step 17

There is only one number that this square can be, and the puzzle completes.

CalcuDoku Finished Puzzle

Finished Puzzle

The completed puzzle.