Killer Sudoku by Serkan Yürekli

Killer Sudoku by Serkan Yürekli

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Theme: Clue Symmetry and Logic (Originally on 2017 Brand’s Sudoku Open)

Author/Opus: This is the 168th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Standard Sudoku rules. Also, the sum of the digits in each cage must equal the value given in the upper-left corner of that cage. Digits cannot repeat inside a cage.

Answer String: Enter the 3rd row from left to right, followed by a comma, followed by the 7th row from left to right.

Time Standards (highlight to view): Grandmaster = 7:00, Master = 12:00, Expert = 24:00

Note: Follow this link for other variations of Sudoku and this link for classic Sudoku. If you are new to this puzzle type, here are our easiest Sudoku to get started on.

Shape Sudoku by Serkan Yürekli

Sudoku by Serkan Yürekli

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Theme: Four Squares (Originally on 2017 Brand’s Sudoku Open)

Author/Opus: This is the 167th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Standard Sudoku rules. Also, there are some numbered shapes that must be put into the grid. Shapes can be rotated, but cannot be reflected.

Answer String: Enter the 5th row from left to right, followed by a comma, followed by the 7th row from left to right.

Time Standards (highlight to view): Grandmaster = 4:15, Master = 11:45, Expert = 23:30

Note: Follow this link for other variations of Sudoku and this link for classic Sudoku. If you are new to this puzzle type, here are our easiest Sudoku to get started on.

Even/Odd Sudoku by Serkan Yürekli

Sudoku by Serkan Yürekli

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Theme: Alternating Stripes (Originally on 2017 Brand’s Sudoku Open)

Author/Opus: This is the 166th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Standard Sudoku rules. Also, cells with a square contain an even digit; cells with a circle contain an odd digit.

Answer String: Enter the 5th row from left to right, followed by a comma, followed by the 4th column from top to bottom.

Time Standards (highlight to view): Grandmaster = 3:45, Master = 6:00, Expert = 12:00

Note: Follow this link for other variations of Sudoku and this link for classic Sudoku. If you are new to this puzzle type, here are our easiest Sudoku to get started on.

Kakuro by Serkan Yürekli

Kakuro by Serkan Yürekli

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Theme: Hidden

Author/Opus: This is the 165th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Standard Kakuro Rules.

Answer String: Enter the values in each white cell in the marked rows from left to right, separating the groups with a comma.

Time Standards (highlight to view): Grandmaster = 3:30, Master = 5:00, Expert = 10:00

Note: Follow this link for other Kakuro puzzles. More Kakuro puzzles can be found in Kakuro and Variations by Serkan Yürekli. Kakuro will also be featured in the upcoming The Art of Puzzles 2.

Double Kakuro by Serkan Yürekli

Kakuro by Serkan Yürekli

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Theme: Unicellular

Author/Opus: This is the 164th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Variation of Kakuro. The gray (2×2) cells are to be filled by a single digit which sits in multiple rows and columns. No digits can repeat within an entry, regardless of if it is in a small or large cell.

Answer String: Enter the values in each white/gray cell in the marked rows from left to right, separating the groups with a comma.

Time Standards (highlight to view): Grandmaster = 3:00, Master = 4:15, Expert = 8:30

Note: Follow this link for other Kakuro puzzles. More Kakuro puzzles can be found in Kakuro and Variations by Serkan Yürekli. Kakuro will also be featured in the upcoming The Art of Puzzles 2.

Hex Tapa by Serkan Yürekli

Tapa by Serkan Yürekli

(view directly for a larger image)

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Theme: Clue Symmetry and Logic (for Chris Green)

Author/Opus: This is the 163rd puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Variation of Tapa. Additionally painted cells cannot form three hexagons meeting in a point. There are no wall segments on cells containing numbers.

Answer String: Enter the length in cells of each of the shaded segments from left to right for the marked rows, starting at the top. Separate each row’s entry from the next with a comma.

Time Standards (highlight to view): Grandmaster = 9:30, Master = 13:45, Expert = 27:30

Note: Follow this link for other Tapa variations and this link for classic Tapa. If you are new to this puzzle type, here are our easiest Tapa puzzles to get started on. More Tapa puzzles can be found in The Art of Puzzles and in Tapa and Variations, both by Serkan Yürekli.

Japanese Sums by Serkan Yürekli

Japanese Sums by Serkan Yürekli

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Theme: All Clues are Different Clues (for Randy Rogers)

Author/Opus: This is the 162nd puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Place the digits 1-7 (1-9 for the example) in some of the cells, so that no digit is repeated in any row or column. Numbers on the outside of the grid indicate the sums of adjacent digit groups in that row or column, in order. Each sum is separated by at least one unused cell. A ? can represent any sum 1 or larger.

Japanese Sums Example

Answer String: Enter the 2nd row from left to right, followed by a comma, followed by the 3rd row from left to right. Use a capital X for empty cells.

Time Standards (highlight to view): Grandmaster = 4:00, Master = 5:30, Expert = 11:00

Note: Follow this link for other less common Number Placement puzzles.