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Theme: Cross the Streams

Author/Opus: This is the 249th puzzle from our contributing puzzlemaster Prasanna Seshadri.

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

Difficulty: 5 stars

Time Standards (highlight to view): Grandmaster = 15:30, Master = 20:00, Expert = 40:00

Solution: PDF and solving video.

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

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Theme: Triominoes

Author/Opus: This is the 21st puzzle from our newest contributing puzzlemaster Takeya Saikachi.

Rules: Standard Kakuro rules. Also, if a gray circle is given between two adjacent cells, then the two numbers in those cells must be consecutive. (Note: not all gray circles are given; adjacent cells without a circle may contain either consecutive numbers or nonconsecutive numbers.)

Difficulty: 3 stars

Time Standards (highlight to view): Grandmaster = 4:15, Master = 7:15, Expert = 14:30

Solution: PDF and solving video.

Note: Follow this link for classic Kakuro and this link for Kakuro variations. More Kakuro puzzles can be found in Kakuro and Variations by Serkan Yürekli and in The Art of Puzzles 2.

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Author/Opus: This is the 226th puzzle from our contributing puzzlemaster Murat Can Tonta.

Rules: Standard Kakuro rules except on a hexagonal grid: Fill all empty hexes with digits from 1-9 so that all number clues (in white) indicate the sum of the digits in that direction. Digits cannot repeat in any entry (i.e., any group of hexes connected either horizontally or in one of the two diagonal directions, without any black cells separating them). This no repeat rule applies even for unclued entries.

Difficulty: 4 stars

Time Standards (highlight to view): Grandmaster = 6:45, Master = 9:30, Expert = 19:00

Solution: PDF and solving video.

Note: Follow this link for classic Kakuro and this link for Kakuro variations. More Kakuro puzzles can be found in Kakuro and Variations by Serkan Yürekli and in The Art of Puzzles 2.

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Theme: 2022

Author/Opus: This is the 410th puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Standard Kakuro rules. Also, no two consecutive digits (i.e., digits that differ by 1) can be in cells that share an edge.

Difficulty: 4.5 stars

Time Standards (highlight to view): Grandmaster = 10:00, Master = 14:30, Expert = 29:00

Solution: PDF; a solution video is also available here.

Note: Follow this link for classic Kakuro and this link for Kakuro variations. More Kakuro puzzles can be found in Kakuro and Variations by Serkan Yürekli and in The Art of Puzzles 2.

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Theme: Black Hexagon

Author/Opus: This is the 221st puzzle from our contributing puzzlemaster Murat Can Tonta.

Rules: Standard Kakuro rules except on a hexagonal grid: Fill all empty hexes with digits from 1-9 so that all number clues (in white) indicate the sum of the digits in that direction. Digits cannot repeat in any entry (i.e., any group of hexes connected either horizontally or in one of the two diagonal directions, without any black cells separating them). This no repeat rule applies even for unclued entries.

Difficulty: 4 stars

Time Standards (highlight to view): Grandmaster = 7:45, Master = 10:00, Expert = 20:00

Solution: PDF; a solution video is also available here.

Note: Follow this link for classic Kakuro and this link for Kakuro variations. More Kakuro puzzles can be found in Kakuro and Variations by Serkan Yürekli and in The Art of Puzzles 2.

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

Theme: Y’s for Kakuro

Author/Opus: This is the 15th puzzle from guest contributor Takeya Saikachi.

Rules: Standard Kakuro rules. Also, identical digits cannot be in diagonally adjacent cells.

Difficulty: 2.5 stars

Time Standards (highlight to view): Grandmaster = 2:45, Master = 3:30, Expert = 7:00

Solution: PDF; a solution video is also available here.

Note: Follow this link for classic Kakuro and this link for Kakuro variations. More Kakuro puzzles can be found in Kakuro and Variations by Serkan Yürekli and in The Art of Puzzles 2.

(This is a bonus “second” puzzle that is not connected to the usual Monday-Saturday week difficulty. In fact, this is around Sunday Stumper difficulty.)

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Theme: Chi

Author/Opus: This is the 6th puzzle from guest contributor David Altizio.

Rules: Variation of Kakuro Rules. One digit must be duplicated and appear exactly twice in each entry (i.e., group of cells connected horizontally or vertically without any black cells between). All other digits must not repeat within an entry.

Difficulty: 5 stars

Time Standards (highlight to view): Grandmaster = 22:30, Master = 37:30, Expert = 1:15:00

Solution: PDF; a solution video is also available here.

Note: Follow this link for classic Kakuro and this link for Kakuro variations. More Kakuro puzzles can be found in Kakuro and Variations by Serkan Yürekli and in The Art of Puzzles 2.

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

Theme: Zero

Author/Opus: This is the 341st puzzle from our managing editor Serkan Yürekli.

Rules: Standard Kakuro Rules, except that the allowed digit range is 0-9.

Difficulty: 4 stars

Time Standards (highlight to view): Grandmaster = 6:30, Master = 9:45, Expert = 19:30

Solution: PDF; a solution video is also available here.

Note: Follow this link for classic Kakuro and this link for Kakuro variations. More Kakuro puzzles can be found in Kakuro and Variations by Serkan Yürekli and in The Art of Puzzles 2.

This year, we have started to have some extra difficult Sunday Stumpers, about once a month. These will be quite tough puzzles, but with a logical path to be found (and solution videos to help). This sixth Sunday Stumper is a Kakuro puzzle with some extra clue shadings to indicate connected digit subsets for some of the entries.

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Theme: Eye

Author/Opus: This is the 209th puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Standard Kakuro Rules. Also, whenever two multi-digit entries intersect and the set of digits in one entry is a subset of the set of digits in the other entry, the cell preceding each of those entries (either giving the entry’s clue or indicating that the entry is unclued) is shaded in gray. A shaded cell may be shaded because of its Across entry, Down entry, or both. Any clue cell that is not shaded does not have a multi-digit entry intersecting its Across or Down entries with a shared subset of digits. Any set of digits is considered a subset of itself.

See also this example:

Difficulty: 5 stars

Time Standards (highlight to view): Grandmaster = 20:00, Master = 30:00, Expert = 1:00:00

Solution: PDF; a solution video is also available here.

Note: Follow this link for classic Kakuro and this link for Kakuro variations. More Kakuro puzzles can be found in Kakuro and Variations by Serkan Yürekli and in The Art of Puzzles 2.

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Theme: Capsules

Author/Opus: This is the 331st puzzle from our managing editor Serkan Yürekli.

Rules: Fill all empty hexes with digits from 1-9 so that all number clues (in white) indicate the sum of the digits in that direction. Digits cannot repeat in any entry (i.e., any group of hexes connected either horizontally or in one of the two diagonal directions, without any black cells separating them). This no repeat rule applies even for unclued entries.

Difficulty: 1 star

Time Standards (highlight to view): Grandmaster = 0:40, Master = 1:15, Expert = 2:30

Solution: PDF; a solution video is also available here.

Note: Follow this link for classic Kakuro and this link for Kakuro variations. More Kakuro puzzles can be found in Kakuro and Variations by Serkan Yürekli and in The Art of Puzzles 2.