    # CalcuDoku

Would you like to use CalcuDoku puzzles in your publication?

I can provide CalcuDoku puzzles in the sizes and difficulties listed below, but at the moment these puzzles can only be created in limited print sizes and resolutions. Please feel free to contact me to discuss your requirements for CalcuDoku puzzles in more detail, and if required I'll send you some printable samples.

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

## CalcuDoku Help Section

Can you complete the grid and satisfy the mathematical cage clues?

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. ## 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. ## Step 2

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

The only way to make 7 in three squares using addition is 1 + 2 + 4. ## Step 5

As we know where the <1>, <2> and <4> of Row 1 are, we know that this square is <3>. ## Step 6

As this cage must equal 2 under subtraction, it must be 3 - 1, which makes this square <1>. ## Step 7

Neither of these squares can contain <4>. This is because the 12x clue in this column MUST contain the <4>. ## Step 8

Removing <4> on the previous step forced the <1> of this cage, which makes this square the <4>. ## Step 9

As we now know where the <1> for this column is, we can remove it from this square leaving the <2>. ## 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>. ## Step 11

Row 1 is only missing its <4>, and that must go in this square. ## Step 12

This square can only be <2> as the other numbers are either in Row 4 or Column 4. ## Step 13

Both of these numbers are forced as each only has one number left in the Row or Column. ## 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>. ## Step 15

This square can only be <2> as all other numbers already occur in the row or column. ## Step 16

These squares are now forced as each only has one number left in the row or column. ## Step 17

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

The completed puzzle.