Puzzle No. 462: XV Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

If the sum of digits in orthogonally adjacent cells is 10, then they are separated by an X. If the sum of digits in orthogonally adjacent cells is 5, then they are separated by a V. All possible Xs & Vs are marked.

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Puzzle No. 461: Consecutive Pairs Sudoku

 

Rules: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

Digits in cells separated by a white circle must be consecutive (have a difference of 1). Not all circles are given.

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Puzzle No. 460: Dutch Whispers-Quadruple Hybrid Sudoku

 

Rules: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

Adjacent digits along each marked line have a difference of at least 4.

Digits in circles must appear in the surrounding four cells, in some order.

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Puzzle No. 459: Renban-Quadruple Hybrid Sudoku

 

Rules: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

Each marked line contains consecutive digits, in any order.

Digits in circles must appear in the surrounding four cells, in some order.

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Puzzle No. 458: Sum Next to 9-Renban Sudoku

 

Rules: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

Clues outside the grid are the sum of the numbers in the cell that are orthogonally adjacent to the 9 along the direction.

Each marked line contains consecutive digits, in any order.

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Puzzle No. 457: Rectangular Multiplication Sudoku

 

Rules: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

The cells inside each rectangle form a column multiplication where the two-digit or three-digit number in the second line is equal to the two-digit or three-digit number in the first line multiplied by the given number (reading left to right).

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Puzzle No. 456: Mathdoku

 

Rules: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

For every outlined 3x3 box that are marked with clues, there are exactly 4 clues in each box, where those clues are the results of math operations (+, -, ×, ÷). All 4 math operations must be used exactly once in each marked box.

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Puzzle No. 455: Positional X Sums Sudoku

 

Rules: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

The clues outside the grid indicate the sum of the digits in the 1st and Xth cells in the corresponding direction, where X is the digit in the first cell.

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Puzzle No. 454: Pointing Arrow Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

There are some arrow shapes in the grid. The sum of the digits along the path of each arrow must equal the digit in the circled cell. Digits may repeat along an arrow. 

Each number placed in the cell with a circle appears at least once in the pointing direction starting from the end of the corresponding arrow.

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Puzzle No. 453: Odd Even Count Sudoku

 

Rules: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

An even digit placed in a cell with a circle indicates the number of even digits placed in the surrounding 8 cells. An odd digit placed in a cell with a circle indicates the number of odd digits placed in the surrounding cells. Digits placed in cells without a circle may have either of these properties.

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Puzzle No. 452: Fog Of War - German Whispers-Dutch Whispers-Sequence Lines-Kropki Pairs Sudoku from my new book "Fog Of War : Vol # 1"

 

This puzzle is taken from my new book "Fog Of War : Vol # 1". 

This puzzle was also covered by Bremster on his Youtube channel. You can watch the video here .

The book is available in PDF format on Payhip. Here is the link https://payhip.com/b/P2qtO .

Rules: Classic Sudoku rules apply. 

The grid is partially covered in fog. Placing correct digits will clear the fog from the digit's surrounding cells. 

Adjacent digits along each green line have a difference of at least 5. 

Adjacent digits along each orange line have a difference of at least 4. 

Digits along each grey line have to be different and must form an arithmetic sequence in the correct order. 

A black dot between two digits means one of them is double the other. A white dot between two digits means they are consecutive. Not all possible black and white dots are necessarily given.

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FOG OF WAR: A SUDOKU BOOK CONTAINING 20 FOG OF WAR SUDOKUS

 

Hi All. My new book FOG OF WAR is now available on Payhip.com in PDF Format. The book contains 20 Fog Of War Sudokus with a good mix of different Sudoku Variants. All the Sudokus are logically solvable and no guess work is required. The Sudokus in the book are test solved by Édouard Lebeau and his timings for each Sudoku is also provided, so that the solvers can compare their solve times with one of the best Sudoku solvers.

The book can be purchased in PDF format from the following link https://payhip.com/b/P2qtO

I had an amazing time setting the Sudokus for this book. Hope you all have an equally amazing time solving the Sudokus from the book.

Puzzle No. 451: Sequence Sudoku

 

Rules: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

Digits along each marked line have to be different and must form an arithmetic sequence in the correct order. 

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Puzzle No. 450: Arrow-Pointing Evens Hybrid Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

There are some arrow shapes in the grid. The sum of the digits along the path of each arrow must equal the digit in the circled cell. Digits may repeat along an arrow. 

Digits outside the grid indicate the number of even digits in the direction of the diagonal arrow.

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Puzzle No. 449: Classic Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

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Puzzle No. 448: 0-8 Killer Sudoku

 

RULES: Place a digit from 0 to 8 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

There are some cages in the grid. The number on the top left corner of each cage is equal to the sum of the digits in that cage. Digits do not repeat in a cage.

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Puzzle No. 447: 0-8 Region Sum Lines Sudoku

 

RULES: Place a digit from 0 to 8 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

For each line, digits on the line have an equal sum N within each box it passes through. If a line passes through the same box more than once, each individual segment of such a line within that box sums to N separately. 

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Puzzle No. 446: 0-8 X Sums Sudoku

 

RULES: Place a digit from 0 to 8 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

The clues outside the grid indicate the sum of the first X digits placed in the corresponding direction, where X is equal to the first digit placed in that direction. 

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Puzzle No. 445: Odd Even Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

Cells containing grey circles contain only odd digits. Cells containing grey squares contain only even digits.

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Puzzle No. 444: 0-8 Little Killer Sudoku

 

RULES: Place a digit from 0 to 8 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

Numbers with arrows outside the grid indicate the sum of the digits appearing in the cells in the corresponding direction. Digits may repeat in the direction of the arrow.

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Puzzle No. 443: 0-8 Arrow Sudoku

 

RULES: Place a digit from 0 to 8 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

There are some arrow shapes in the grid. The sum of the digits along the path of each arrow must equal the digit in the circled cell. Digits may repeat along an arrow. 

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Puzzle No. 442: German Whispers-XV Pairs Hybrid Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

Adjacent digits along each marked line have a difference of at least 5.

Digits separated by an X sum to 10; digits separated by a V sum to 5. Not all possible Xs and Vs are necessarily given. 

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Puzzle No. 441: Dutch Whispers Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

Adjacent digits along each marked line have a difference of at least 4.

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Puzzle No. 440: German Whispers Sudoku

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

Adjacent digits along each green line have a difference of at least 5.

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Puzzle No. 439: Renban Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

Each marked line contains consecutive digits, in any order.

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Puzzle No. 438: German Whispers-Renban-Region Sum Lines Hybrid Sudoku

 

Rules: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

Adjacent digits along each green line have a difference of at least 5.

Each purple line contains consecutive digits, in any order.

For each blue line, digits on the line have an equal sum N within each box it passes through. If a line passes through the same box more than once, each individual segment of such a line within that box sums to N separately. 

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Puzzle No. 437: Fog Of War - Kropki Pairs-German Whispers Hybrid Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

The grid is partially covered in fog. Placing correct digits will clear the fog from the digit's surrounding cells.

A black dot between two digits means one of them is double the other. A white dot between two digits means they are consecutive. Not all possible black and white dots are necessarily given.

Adjacent digits along each green line have a difference of at least 5.

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Puzzle No. 436: Fog Of War - Kropki Pairs-German Whispers Hybrid Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

The grid is partially covered in fog. Placing correct digits will clear the fog from the digit's surrounding cells.

A black dot between two digits means one of them is double the other. A white dot between two digits means they are consecutive. Not all possible black and white dots are necessarily given.

Adjacent digits along each green line have a difference of at least 5.

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Puzzle No. 435: Classic Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

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Puzzle No. 434: XY Differences Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

Horizontally adjacent cells marked by a diamond contain digits whose difference is equal to the first (leftmost) digit of the corresponding row.

Vertically adjacent cells marked by a diamond contain digits whose difference is equal to the first (topmost) digit of the corresponding column.

All such diamonds are marked.

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Puzzle No. 433: Group Sum-Renban Hybrid Sudoku 08 from the book World Of Sudoku: Vol # 10

 

A Group Sum-Renban Hybrid Sudoku from my new book - World Of Sudoku: Vol # 10. This Sudoku also featured on the YouTube Channel Cracking The Cryptic, covered by Mark. You can watch the video here

Rules: Place a digit from 1 to 9 into each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

Numbers inside each circle indicate the sum of the digits in the cells covered by the corresponding circle. Digits may repeat in the cells covered by a circle. 

Each marked line contains consecutive digits, in any order.

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World Of Sudoku: Vol # 10

It gives me great joy to tell you all that my new book World Of Sudoku: Vol # 10 has been released and is available on Amazon in Paperback format and on Payhip in PDF format. The book contains 120 Handcrafted Sudokus covering 10 Hybrid Sudoku Variants. All the puzzles in the book are test solved by Édouard Lebeau and his test solve timings are mentioned with each puzzle. Online Solving Links of Penpa as well as Sudokupad are also provided with each sudoku. The Variants covered in the book are:

• X Sums-Consecutive Pairs Hybrid Sudoku;
• Clone-Sum Frame Hybrid Sudoku;
• Outside Palindrome Hybrid Sudoku;
• XV Pairs-Skyscrapers Hybrid Sudoku;
• Killer-German Whispers Hybrid Sudoku;
• Group Sum-Renban Hybrid Sudoku;
• Mathrax Pointing Evens Hybrid Sudoku;
• Kropki Pairs-Little Killer Hybrid Sudoku;
• Quadruples-Region Sum Lines Hybrid Sudoku;
• Thermo-Arrow Hybrid Sudoku;

The links to Amazon and Payhip are given below:

Link to Amazon for Paperback  https://tinyurl.com/worldofsudokuvol10

Link to Payhip for PDF https://payhip.com/worldofsudoku

Happy Sudokuing!

 

Puzzle No. 432: Between Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

Every digit on a grey line must have a value which lies between the values of the two digits in the circles at the ends of the line. Digits may repeat along a line.

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Puzzle No. 431: Killer-German Whispers Hybrid Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

There are some cages in the grid. The number on the top left corner of each cage is equal to the sum of the digits in that cage. Digits do not repeat in a cage.

Adjacent digits along each green line have a difference of at least 5.

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Puzzle No. 430: Consecutive Pairs Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

If a grey circle is given between two adjacent cells, then the digits in those cells will be consecutive. Not all grey circles are given, which means adjacent cells without a grey circle may or may not contain consecutive digits.

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Puzzle No. 429: Battenberg Sudoku

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

Wherever 2 odd and 2 even digits form a 2x2 checkerboard pattern, a Battenburg marking is given. If there is no marking, the above pattern is not allowed.

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Puzzle No. 428: Lockout Lines Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

Endpoints (Diamonds) must differ by at least 4. Digits on the line must be different than the endpoint values and must not fall between them. Each Lockout segment is treated as an independent Lockout Line. Digits can repeat if allowed by other rules.

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Puzzle No. 427: Classic Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

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Puzzle No. 426: Arrow Sudoku

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

There are some arrow shapes in the grid. The sum of the digits along the path of each arrow must equal the digit in the circled cell. Digits may repeat along an arrow. 

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Puzzle No. 425: Classic Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

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Puzzle No. 424: Arrow Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

There are some arrow shapes in the grid. The sum of the digits along the path of each arrow must equal the digit in the circled cell. Digits may repeat along an arrow. 

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Puzzle No. 423: Little Killer-X Sums Hybrid Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

Numbers with arrows outside the grid indicate the sum of the digits appearing in the cells in the corresponding direction. Digits may repeat in the direction of the arrow.

The clues outside the grid indicate the sum of the first X digits placed in the corresponding direction, where X is equal to the first digit placed in that direction. 

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Puzzle No. 422: One or Two Difference Pairs Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

If a circle is given between two adjacent cells, then the difference in those cells must be 1 or 2. Not all circles are given. 

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Puzzle No. 421: Quad Max Sudoku

 

RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. 

The digit pointed by each arrow must be larger than the other three digits that the arrow touches.

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Puzzle No. 420: Odd Even Count Sudoku

RULES: Place a digit from 1 to 9 into each empty cell in the grid so that each digit appears exactly once in each row, column and 3x3 outlined box.

The digit in each circled cell is the number of digits in the 8 surrounding cells that have the same parity (odd/even) as that digit.

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Puzzle No. 419: Renban-Kropki Pairs Hybrid Sudoku 6x6

RULES: Place a digit from 1 to 6 in each empty cell so that each digit appears exactly once in each row, column and 2x3 outlined box.

Each purple line contains consecutive digits, in any order.

If the absolute difference between two digits in neighboring cells equals 1, then they are separated by a white dot. If the digit in a cell is half or double of the digit in a neighboring cell, then they are separated by a black dot. The dot staying between 1 and 2 can have any of these dots. All possible dots are not marked.

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Puzzle No. 418: Slow Thermo Sudoku 6x6

 

RULES: Place a digit from 1 to 6 in each empty cell so that each digit appears exactly once in each row, column and 2x3 outlined box.

There are some thermometer shapes in the grid. Digits along the thermometers never decrease from the bulb to the flat end. 

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Puzzle No. 417: Thermo Sudoku 6x6

 

RULES: Place a digit from 1 to 6 in each empty cell so that each digit appears exactly once in each row, column and 2x3 outlined box.

There are some thermometer shapes in the grid. The digits are in increasing order from the bulb to the flat end of each thermometer.

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Puzzle No. 416: Little Killer Sudoku 6x6

 

RULES: Place a digit from 1 to 6 in each empty cell so that each digit appears exactly once in each row, column and 2x3 outlined box.

Numbers with arrows outside the grid indicate the sum of the digits appearing in the cells in the corresponding direction. Digits may repeat in the direction of the arrow.

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Puzzle No. 415: Thermo-German Whispers-Renban-Region Sum Lines-Kropki Pairs Hybrid Sudoku

 

Rules: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.

There are some thermometer shapes in the grid. The digits are in increasing order from the bulb to the flat end of each thermometer. 

Adjacent digits along each green line have a difference of at least 5.

Each purple line contains consecutive digits, in any order.

For each blue line, digits on the line have an equal sum N within each box it passes through. If a line passes through the same box more than once, each individual segment of such a line within that box sums to N separately. 

If the absolute difference between two digits in neighboring cells equals 1, then they are separated by a white dot. If the digit in a cell is half or double of the digit in a neighboring cell, then they are separated by a black dot. The dot staying between 1 and 2 can have any of these dots. All possible dots are not marked.

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