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Micro (4x4) Sudoku
Mini (6x6) Sudoku
"+9" Samples
Special Occasions
Standard (9x9) Sudoku
Sudoku Strategy
Free Printable Books
Sample Puzzles
About DC Sudoku
How to Sudoku
Sudoku Humor
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Pi Circle #1
Sorry, this puzzle is not yet online playable, but you may print it and solve on paper. It is made
by approximating a circle (with an octogaon) using the first digits of pi (3.1415926535897932384).
A few random digits had to be added to make the solution unique.
- More Pi Puzzles
- Color Circle Pi The first 32 digits of pi snake around the puzzle changing color by 8 units of hue from digit to digit, thus making a color circle.
- Pi Circle #1 .
- Pi Circle #2 .
- Pi Closed Loop #1 Abandons the cirlce idea from the above puzzles in order to use more digits. Starts and ends on the same 3.
- Pi Closed Loop #2 Abandons the cirlce idea from the above puzzles in order to use more digits.
- Happy Pi Day: Pi Symbol #1. Distorts the grid to show a pi symbol, uses the characters for HAPPY PI DAY 314.
- Happy Pi Day: Pi Symbol #2. Distorts the grid to show a pi symbol, uses the characters for HAPPY PI DAY 314.
Special Occassion Puzzles
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- Christmas
- Christmas Puzzle
- Christmas Tree Puzzle Numbers version
- Christmas Tree Puzzle Harder letters version
- Christmas Tree Puzzle Easier letters version
- Christmas Puzzle Solutions
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- Valentine's Day
- Valentine Puzzle 1
- Valentine Puzzle 2: message forms a heart
- Challenge Version of Heart Puzzle #1 Irregular grid arranged to show a heart shape
Easier Version of Heart Puzzle #1 More starting letters provided than the Challenge version
- Challenge Version of Heart Puzzle #2 Irregular grid arranged to show a heart shape
Easier Version of Heart Puzzle #2 More starting letters provided than the Challenge version
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- New Year
- New Year Puzzle #1
- New Year Puzzle #2
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- Birthday Puzzles
- Just HAPPY BIRTHDAY: Happy Birthday #1,
Happy Birthday #2
- By Name: Adam,
Barb,
Barbara,
Barry,
Brad,
Harry,
Patty,
Tara
- Other:
Baby,
Dad,
Daddy
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- Pi
- Color Circle Pi The first 32 digits of pi snake around the puzzle changing color by 8 units of hue from digit to digit, thus making a color circle.
- Pi Circle #1 .
- Pi Circle #2 .
- Pi Closed Loop #1 Abandons the cirlce idea from the above puzzles in order to use more digits. Starts and ends on the same 3.
- Pi Closed Loop #2 Abandons the cirlce idea from the above puzzles in order to use more digits.
- Happy Pi Day: Pi Symbol #1. Distorts the grid to show a pi symbol, uses the characters for HAPPY PI DAY 314.
- Happy Pi Day: Pi Symbol #2. Distorts the grid to show a pi symbol, uses the characters for HAPPY PI DAY 314.
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- Easter Puzzles
- HAPPY EASTER! #1 (a bit harder than #2)
- HAPPY EASTER! #2 (a bit easier than #1)
- CHOCOLATE EGGS
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