Free Sudoku Problems 2015-01

Problems

 

Sudoku Problems 2015-01-05

 

Backslash L(2,4) D(21,18,1,1,1,0) V Difficult Must have unique characters in each row and column but the 3 by 3 boxes are replaced by backslashes. These wrap left to right and top to bottom so the overall geometry is a doughnut (torus)

Backslash L(2,4) D(21,18,1,1,1,0)
V Difficult
Must have unique characters in each row and column but the 3 by 3 boxes are replaced by backslashes. These wrap left to right and top to bottom so the overall geometry is a doughnut (torus)

People L(2,4) D(18,17,1,1,1,0) V Difficult The shapes have "lumps" on each side to become quite irregular. They look to me like little people. This problem wraps top to bottom and side to side so the overall geometry is like a doughnut (torus).

People L(2,4) D(18,17,1,1,1,0)
V Difficult
The shapes have “lumps” on each side to become quite irregular. They look to me like little people. This problem wraps top to bottom and side to side so the overall geometry is like a doughnut (torus).

Sudoku 9X9 L(1,2) D(25,15,1,0,0,0) Gentle This is the standard geometry that is usually seen. Characters must not repeat in rows or columns or in any of the 3 by 3 boxes that are outlined.

Sudoku 9X9 L(1,2) D(25,15,1,0,0,0)
Gentle
This is the standard geometry that is usually seen. Characters must not repeat in rows or columns or in any of the 3 by 3 boxes that are outlined.

Toroid H L(2,3) D(21,16,1,1,0,0) Difficult The normal 3X3 boxes are replaced by horizontal stripes (helices) which wrap around the problem. These stripes join the left side to the right side and the top to the bottom so that the overall geometry is a doughnut (torus).

Toroid H L(2,3) D(21,16,1,1,0,0)
Difficult
The normal 3X3 boxes are replaced by horizontal stripes (helices) which wrap around the problem. These stripes join the left side to the right side and the top to the bottom so that the overall geometry is a doughnut (torus).

Tred 01 L(2,1) D(27,6,0,0,0,0) Moderate Tredoku 3 dimensional problem 01 with 7 faces, 6 rows and 6 columns

Tred 01 L(2,1) D(27,6,0,0,0,0)
Moderate
Tredoku 3 dimensional problem 01 with 7 faces, 6 rows and 6 columns

Sudoku Problems 2015-01-12

3D 3X3 Cube L(1,1) D(12,3,0,0,0,0) Easy True 3 dimensional problem, albeit a very simple one. Each 3X3 square is one plane of a 3X3X3 cube. Consider the squares stacked on top of each other. There are 9 planes in this problem each of which is a 3X3 square which must have no repeating characters. A couple of the planes are highlighted in colour.

3D 3X3 Cube L(1,1) D(12,3,0,0,0,0)
Easy
True 3 dimensional problem, albeit a very simple one. Each 3X3 square is one plane of a 3X3X3 cube. Consider the squares stacked on top of each other. There are 9 planes in this problem each of which is a 3X3 square which must have no repeating characters. A couple of the planes are highlighted in colour.

Diamond L(2,1) D(21,18,0,0,0,0) Moderate Here the shapes are pushed over to become diamonds. This wraps side to side but not top to bottom.

Diamond L(2,1) D(21,18,0,0,0,0)
Moderate
Here the shapes are pushed over to become diamonds. This wraps side to side but not top to bottom.

Sudoku 9X9X L(1,4) D(24,13,1,1,1,0) Difficult As regular 9 by 9 but must also have unique characters in each diagonal, highlighted.

Sudoku 9X9X L(1,4) D(24,13,1,1,1,0)
Difficult
As regular 9 by 9 but must also have unique characters in each diagonal, highlighted.

Toroid V L(2,1) D(19,10,0,0,0,0) Moderate The normal 3X3 boxes are replaced by vertical stripes (helices) which wrap around the problem. These stripes join the left side to the right side and the top to the bottom so that the overall geometry is a doughnut (torus).

Toroid V L(2,1) D(19,10,0,0,0,0)
Moderate
The normal 3X3 boxes are replaced by vertical stripes (helices) which wrap around the problem. These stripes join the left side to the right side and the top to the bottom so that the overall geometry is a doughnut (torus).

Tred 02 L(2,1) D(27,6,0,0,0,0) Moderate Tredoku 3 dimensional problem 02 with 8 faces, 6 rows and 9 columns

Tred 02 L(2,1) D(27,6,0,0,0,0)
Moderate
Tredoku 3 dimensional problem 02 with 8 faces, 6 rows and 9 columns

Sudoku Problems 2015-01-19

 

Film L(2,1) D(23,9,0,0,0,0) Moderate Similar to the regular 9 by 9 Sudoku but the squares have lumps in the top and bottom. The problem wraps top to bottom but not side to side so the overall geometry is a cylinder.

Film L(2,1) D(23,9,0,0,0,0)
Moderate
Similar to the regular 9 by 9 Sudoku but the squares have lumps in the top and bottom. The problem wraps top to bottom but not side to side so the overall geometry is a cylinder.

People L(2,4) D(17,29,7,7,4,0) V Difficult The shapes have "lumps" on each side to become quite irregular. They look to me like little people. This problem wraps top to bottom and side to side so the overall geometry is like a doughnut (torus).

People L(2,4) D(17,29,7,7,4,0)
V Difficult
The shapes have “lumps” on each side to become quite irregular. They look to me like little people. This problem wraps top to bottom and side to side so the overall geometry is like a doughnut (torus).

Sudoku 9X9 L(1,1) D(32,4,0,0,0,0) Easy This is the standard geometry that is usually seen. Characters must not repeat in rows or columns or in any of the 3 by 3 boxes that are outlined.

Sudoku 9X9 L(1,1) D(32,4,0,0,0,0)
Easy
This is the standard geometry that is usually seen. Characters must not repeat in rows or columns or in any of the 3 by 3 boxes that are outlined.

Toroid H L(2,3) D(18,19,2,1,0,0) Difficult The normal 3X3 boxes are replaced by horizontal stripes (helices) which wrap around the problem. These stripes join the left side to the right side and the top to the bottom so that the overall geometry is a doughnut (torus).

Toroid H L(2,3) D(18,19,2,1,0,0)
Difficult
The normal 3X3 boxes are replaced by horizontal stripes (helices) which wrap around the problem. These stripes join the left side to the right side and the top to the bottom so that the overall geometry is a doughnut (torus).

Tred 03 L(2,1) D(27,8,0,0,0,0) Moderate Tredoku 3 dimensional problem 03 with 7 faces, 6 rows and 6 columns

Tred 03 L(2,1) D(27,8,0,0,0,0)
Moderate
Tredoku 3 dimensional problem 03 with 7 faces, 6 rows and 6 columns

Sudoku Problems 2015-01-26

 

3D 4X4 Cube L(2,1) D(30,5,0,0,0,0) Moderate True 3 dimensional problem. Each 4X4 square is one plane of a 4X4X4 cube. Consider the squares stacked on top of each other. There are 12 planes in this problem each of which is a 4X4 square which must have no repeating characters. Some of the planes are highlighted. There are 16 possible characters so I use a standard hexadecimal character set: 0,1,2,…,9,a,…,f.

3D 4X4 Cube L(2,1) D(30,5,0,0,0,0)
Moderate
True 3 dimensional problem. Each 4X4 square is one plane of a 4X4X4 cube. Consider the squares stacked on top of each other. There are 12 planes in this problem each of which is a 4X4 square which must have no repeating characters. Some of the planes are highlighted. There are 16 possible characters so I use a standard hexadecimal character set: 0,1,2,…,9,a,…,f.

Jigsaw L(2,1) D(23,10,0,0,0,0) Moderate As regular 9 by 9 but the normal 3X3 boxes are irregular shapes

Jigsaw L(2,1) D(23,10,0,0,0,0)
Moderate
As regular 9 by 9 but the normal 3X3 boxes are irregular shapes

Sudoku 9X9X L(1,3) D(23,11,2,1,0,0) Moderate As regular 9 by 9 but must also have unique characters in each diagonal, highlighted.

Sudoku 9X9X L(1,3) D(23,11,2,1,0,0)
Moderate
As regular 9 by 9 but must also have unique characters in each diagonal, highlighted.

Toroid V L(2,1) D(20,9,0,0,0,0) Moderate The normal 3X3 boxes are replaced by vertical stripes (helices) which wrap around the problem. These stripes join the left side to the right side and the top to the bottom so that the overall geometry is a doughnut (torus).

Toroid V L(2,1) D(20,9,0,0,0,0)
Moderate
The normal 3X3 boxes are replaced by vertical stripes (helices) which wrap around the problem. These stripes join the left side to the right side and the top to the bottom so that the overall geometry is a doughnut (torus).

Tred 04 L(2,1) D(37,7,0,0,0,0) Moderate Tredoku 3 dimensional problem 04 with 10 faces, 6 rows and 12 columns

Tred 04 L(2,1) D(37,7,0,0,0,0)
Moderate
Tredoku 3 dimensional problem 04 with 10 faces, 6 rows and 12 columns

Solutions

 

Sudoku Solutions 2015-01-05

 Backslash L(2,4) D(21,18,1,1,1,0)  2013-05-01 002603 Solution

People L(2,4) D(18,17,1,1,1,0)  2013-08-13 013124 Solution

Sudoku 9X9 L(1,2) D(25,15,1,0,0,0)  2013-01-21 132437 Solution

Toroid H L(2,3) D(21,16,1,1,0,0)  2013-04-18 175129 Solution

Tred 01 L(2,1) D(27,6,0,0,0,0) 2014-02-18 000052 iso  Solution

Sudoku Solutions 2015-01-12

3D 3X3 Cube L(1,1) D(12,3,0,0,0,0)   2013-01-21 155513 Solution

Diamond L(2,1) D(21,18,0,0,0,0)  2013-04-16 235134 Solution

Sudoku 9X9X L(1,4) D(24,13,1,1,1,0)  2013-05-04 132851 Solution

Toroid V L(2,1) D(19,10,0,0,0,0)  2013-03-29 115956 Solution

Tred 02 L(2,1) D(27,6,0,0,0,0) 2014-02-18 000204 iso  Solution

Sudoku Solutions 2015-01-19

 

Film L(2,1) D(23,9,0,0,0,0)  2013-04-18 232858 Solution - Copy

People L(2,4) D(17,29,7,7,4,0)  2013-08-13 013059 Solution - Copy

Sudoku 9X9 L(1,1) D(32,4,0,0,0,0)  2013-03-29 111654 Solution - Copy

Toroid H L(2,3) D(18,19,2,1,0,0)  2013-04-10 232951 Solution - Copy

Tred 03 L(2,1) D(27,8,0,0,0,0) 2014-02-18 000301 iso  Solution

Sudoku Solutions 2015-01-26

 

3D 4X4 Cube L(2,1) D(30,5,0,0,0,0)   2013-01-09 221601 Solution

Jigsaw L(2,1) D(23,10,0,0,0,0)  2012-12-08 233257 Solution

Sudoku 9X9X L(1,3) D(23,11,2,1,0,0)  2013-05-04 132852 Solution

Toroid V L(2,1) D(20,9,0,0,0,0)  2013-08-10 233804 Solution

Tred 04 L(2,1) D(37,7,0,0,0,0) 2014-02-18 000443 iso  Solution

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