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Theme: Clue Symmetry and Logic

Author/Opus: This is the 127th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Hybrid of Japanese Sums and Latin Squares. Place a digit from 1-6 (1-4 in the example) into some cells so that each digit appears exactly once in each row and column. Numbers outside the grid indicate the sums of all adjacent digits in order in that row or column.

Answer String: Enter the 2nd row from left to right, followed by a comma, followed by the 8th column from top to bottom. Use a capital X for empty cells.

Time Standards (highlight to view): Grandmaster = 4:45, Master = 7:30, Expert = 15:00

Solution: PDF; a solution video is available here.

Note: Follow this link for other Japanese Sums puzzles.

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Theme: Area 29

Author/Opus: This is the 126th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Standard Kakuro Rules.

Answer String: Enter the values in each white cell in the marked row from left to right and then the marked column from top to bottom, separating the groups with a comma.

Time Standards (highlight to view): Grandmaster = 4:30, Master = 6:45, Expert = 13:30

Solution: PDF

Note: Follow this link for other Kakuro puzzles.

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Theme: Going Up Again?

Author/Opus: This is the 252nd puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Variation of Skyscrapers rules. The numbers outside the grid represent the sum of the buildings seen in the row or column. For example, if a row is 12534, the clue from the left would be an 8 (1+2+5) and from the right would be a 9 (4+5).

Answer String: Enter the 3rd row from left to right, followed by a comma, followed by the 4th row from left to right.

Time Standards (highlight to view): Grandmaster = 2:45, Master = 4:30, Expert = 9:00

Solution: PDF

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

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or solve online (using our beta test of Penpa-Edit tools; use tab to shift between number entry and shading modes.)

Theme: Prime Numbers

Author/Opus: This is the 125th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Place a digit from 1-4 (1-3 in the example) into some cells so that each digit appears exactly once in each row and column. Numbers outside the grid indicate the sum of all numbers appearing in the corresponding rows and columns. (Digits in adjacent cells are combined to form multi-digit numbers.)

Answer String: Enter the 5th row from left to right, followed by a comma, followed by the 6th column from top to bottom. Use a capital X for empty cells.

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

Solution: PDF

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

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Theme: Big Plus Signs

Author/Opus: This is the 251st puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Standard TomTom rules, using the integers 1-6.

Answer String: Enter the 2nd row from left to right followed by the 4th row from left to right. Separate the entries with a comma.

Time Standards (highlight to view): Grandmaster = 2:15, Master = 2:45, Expert = 5:30

Solution: PDF

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

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Theme: Unique Digits

Author/Opus: This is the 250th puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Add digits to some cells so each cell contains a one- or two-digit number. The sum of the numbers in each row and in each column must be 100.

Answer String: Enter all numbers including the new and given digits from left to right, starting with the top row, then the middle row, and then the bottom row. Separate each row with a comma. (For example “123454,362737,52399”.)

Time Standards (highlight to view): Grandmaster = 1:30, Master = 3:00, Expert = 6:00

Solution: PDF

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

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Theme: The Clueless Center (for patron Veep)

Author/Opus: This is the 123rd puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Standard Skyscrapers rules. The grid is made of 9 overlapping 5×5 Skyscrapers puzzles. The clue cells shared between grids must see the same number of buildings (i.e., you should fill in all interior gray cells with clue numbers as these are used by two grids).

Answer String: Enter the fifteen digits (in the white cells) within the marked rows from left to right, separating the two rows with a comma.

Time Standards (highlight to view): Grandmaster = 20:00, Master = 35:00, Expert = 1:10:00

Solution: PDF

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

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or solve online (using our beta test of Penpa-Edit tools)

Theme: R is for Randy (for patron Randy Rogers)

Author/Opus: This is the 120th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Standard Kakuro Rules. Also, some cells may remain empty but empty cells cannot share an edge with other empty cells.

Answer String: Enter the values in each white cell in the marked rows from left to right, separating the rows with a comma. Enter a capital X for any blank white cells, and ignore all black cells.

Time Standards (highlight to view): Grandmaster = 4:30, Master = 5:45, Expert = 11:30

Solution: PDF; a solution video is available here.

Note: Follow this link for other Kakuro puzzles.

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Theme: RANDY (for patron Randy Rogers)

Author/Opus: This is the 112th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Variation of Kakuro and Easy as ABC. Enter a single digit from 1 to 9 or letter from R, A, N, D, Y into each cell so that each full row and column contains each letter exactly once. A number clue indicates the sum of the digits in the across or down entry. No digit is repeated within an entry (but digits may repeat within a full row or column). A letter clue indicates the first letter seen from that direction after the clue. (For clarity, all letter and number clues point down or right except for the letter clues on the bottom/right edges of the entire grid which point up/left.)

Answer String: Enter the values in each cell in the marked rows from left to right, separating the rows with a comma. Ignore black cells and USE CAPITAL LETTERS.

Time Standards (highlight to view): Grandmaster = 25:00, Master = 42:30, Expert = 1:25:00

Solution: PDF

Note: Follow this link for other Kakuro puzzles.

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Theme: Pentomino (originally on the US round for the 2016 WPF Puzzle Grand Prix)

Author/Opus: This is the 246th puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Standard TomTom rules, using the integers 1-8.

Answer String: Enter the 1st row from left to right followed by the 4th row from left to right. Separate the entries with a comma.

Time Standards (highlight to view): Grandmaster = 6:30, Master = 12:00, Expert = 24:00

Solution: PDF

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