SUDOKU

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Can you
SUDOKU?
Kathy Bracken
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What is Sudoku?
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Sudoku

• is a logical thinking puzzle
• may use numbers or letters
• is fun!
• Lets play!

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What level would you like to try?
Easy
Medium
Hard
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Rules for Easy Puzzle Fill the boxes so that
the digits 1 4 appear exactly once in each row,
each column, and each block.
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Lets start with 3s because we two of them
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This box must contain a 3.
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If we continue looking at 3s, what else can we
tell?
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This box must also contain a 3. Notice that we
have one three in each column and each row. We
have found all the 3s.
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Look at this column. What can we tell about the
missing blocks?
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These are the only choices for these boxes.
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Whats missing from this row?
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This box must contain a 4.
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We can easily tell what fits in this box.
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This box must contain a 4.
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Where must the fourth 4 go?
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This box must contain a 4.
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What goes here?
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It must be 2.
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What goes here?
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It must be 1.
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What goes here?
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It must be 2.
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What goes here?
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It must be 1.
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What goes here?
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It must be 2.
WE DID IT!!
Go to End
Pick another puzzle
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Rules for Medium Puzzle Fill the boxes so that
the digits 1 6 appear exactly once in each row,
each column, and each block.
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Lets begin with 2s since we have two of them on
the same half of the puzzle.
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This must be a 2.
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Now lets look at 1s because we have three of
them.
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This must be a one.
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Can you tell where the other two 1s must go?
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The 1s must go in these places. We have now
placed all the 1s!
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Lets go back to the 2s. Where do the remaining
2s go?
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The 2s must go in these positions.
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Now look at the places where we have 4 out of 6
in a row or column. From this we can tell what
the other two choices must be.
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What goes here?
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A 3 must go here because it is the only open
place for it.
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What goes here?
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The only numbers available for the box are 4 and
6. Two sixes cant be in the same row, so the 4
must be next to the six.
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What goes here?
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These must be 5 and 6.
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Why must these be right?
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We now have enough information to complete the
top left block. What does it look like?
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Why must these be right?
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Look at this column. What are the missing
numbers? Where do they fit?
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Why must these be right?
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Now we know what these must be.
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You may not have two 3s in the same row, so this
is correct.
Complete the middle block on the left side.
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These were the only possible choices.
Now finish the bottom block on the left side.
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WE DID IT!!!
Go to End
Pick another puzzle
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Are you ready for a challenge?
Rules for Hard Game Fill the boxes so that the
digits 1 9 appear exactly once in each row,
each column, and each block.
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Lets start in the middle where we have the most
information. What numbers are missing from the
center block? Figure out where they go.
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The 5 must go in the corner. So, the 4 must go in
the middle, and the 6 must go top-left.
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Lets continue with 5s. Remember, you need one 5
in every row, every column, and every box.
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Here are all the possibilities for 5s. We have
a lot of 1s lets look at those next.
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Remember, you need one 1 in every row, every
column, and every box.
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Look weve found all the 1s!
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Look at the bottom row. Whats missing? Can you
figure out where the numbers go?
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Youre doing great!
Now lets look at 6s.
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Four of the open boxes should contain 6s. Can
you tell which ones?
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The blank in the 8th row must be a 6, and the
blank in the 3rd column must be a 6. Then we can
tell that row 2, column 6 must be a 6, and column
2, row 7 must be a 6.
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Look at the block on the bottom left. Only two
numbers are missing. Figure those out.
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Now look at the bottom middle block. You can fill
those in.
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Looking good! Try column 7.
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Isnt this fun? Try row 1 but you have to do
column 6 at the same time.
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That wasnt too bad. Lets finish the top middle
block.
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Were closing in fast. Finish rows 2 and 3.
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Try the left-middle block!
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Did you get it right? Finish rows 4 and 6.
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Finished!!!
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Web Sites Used

• Sudoku for Kids This site has a new puzzle for
  kids every day and an archive to select older
  puzzles.