Killer Sudoku by Grant Fikes

Killer Sudoku by Grant Fikes

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Theme: Clue Symmetry and Logic

Author/Opus: This is the 231st puzzle from our contributing puzzlemaster Grant Fikes.

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 8th row from left to right, followed by a comma, followed by the 7th row from top to bottom.

Time Standards (highlight to view): Grandmaster = 3:45, Master = 5:30, Expert = 11:00

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.

Yajilin-Battleships by Serkan Yürekli

Yajilin-Battleships by Serkan Yürekli

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Theme: Clockwise Sequence

Author/Opus: This is the 155th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Variation of Battleships and Yajilin. Place the fleet of ships in the grid so that no ships touch each other, even diagonally. The grid contains internal clues (a number and an arrow) that show how many ship segments are in the indicated direction. All remaining white cells that do not contain a ship segment must be able to form a single loop, as in a Yajilin puzzle.

Answer String: Enter the length in cells of the horizontal loop segments from left to right in the marked rows, starting at the top. If the loop only has vertical segments in the marked row, enter 0. Separate each row’s entry with a comma.

Time Standards (highlight to view): Grandmaster = 2:45, Master = 3:45, Expert = 7:30

Note: Follow this link for classic Yajilin and this link for classic Battleships puzzles.

Tapa (Borders) by Serkan Yürekli

Tapa (Borders) by Serkan Yürekli

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Theme: The most popular puzzle of TVC XII

Author/Opus: This is the 151st puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Standard Tapa rules. Also, if two cells are separated by a thick border, this means that exactly one of those cells is shaded and the other is unshaded.

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 = 3:45, Master = 6:15, Expert = 12:30

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.

Pata by Serkan Yürekli

Pata by Serkan Yürekli

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Theme: The most popular puzzle of TVC XIII

Author/Opus: This is the 150th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Variation of Tapa rules. The clue numbers refer to the groups of unshaded segments around that cell. Cells with numbers count as unshaded cells for adjacent clues. All other rules for the shaded Tapa are the same as usual.

Or see here:

Pata by Serkan Yürekli

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 = 2:45, Master = 5:00, Expert = 10:00

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.

Tapa (Outside) by Serkan Yürekli

Tapa (Outside) by Serkan Yürekli

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Theme: The most popular puzzle of TVC XV

Author/Opus: This is the 149th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Standard Tapa rules. Also, the signs outside the grid indicate the relative values of the number of shaded cells between adjacent rows/columns.

Tapa (Outside) Example

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 = 2:15, Master = 4:00, Expert = 8:00

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.

Snake Pit by Carl Worth

Snake Pit by Carl Worth

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Theme: Nest of Snakes

Author/Opus: This is the 23rd puzzle from our contributing puzzlemaster Carl Worth.

Rules: (Hybrid of Fillomino and Snake Puzzles.) Divide the grid along the boundary lines so that every cell belongs to a snake. A snake is a one-cell-wide path at least two cells long that does not touch itself, not even diagonally. Circled cells must be at one of the ends of a snake. A snake may contain one circled cell, two circled cells, or no circled cells at all. Numbered cells must be part of a snake with a length of exactly that number of cells. A snake may contain one number, multiple identical numbers, or no numbers at all. Two snakes of the same length cannot touch each other horizontally or vertically.

Also see this example:

Snake Pit by Carl Worth

Answer String: For each cell in the marked rows/columns, enter the length of the snake it belongs to. Enter just the last digit for any two-digit number. This example has the key “35522,44462”.

Time Standards (highlight to view): Grandmaster = 3:00, Master = 5:45, Expert = 11:30

Note: Follow these link for other Fillomino or Snake puzzles.

Syuma by Prasanna Seshadri

Syuma by Prasanna Seshadri

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Theme: Clue Symmetry and Logic

Author/Opus: This is the 151st puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Variant of Masyu rules. The loop turns in every black circle and goes straight through at least one adjacent square. The loop goes straight through every white circle and turns in both adjacent squares.

Answer String: Enter the length in cells of the horizontal loop segments from left to right in the marked rows, starting at the top. If the loop only has vertical segments in the marked row, enter 0. Separate each row’s entry with a comma.

Time Standards (highlight to view): Grandmaster = 3:15, Master = 4:45, Expert = 9:30

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