Getting started with this difficult Skyscrapers (Sum) puzzle designed by Murat Can Tonta probably requires noting a lot about the two distinct clues in the grid.

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

Theme: Two Consecutive Numbers

Author/Opus: This is the 274th puzzle from our contributing puzzlemaster Murat Can Tonta.

Rules: Variation of Skyscrapers; each clue represents the sum of the heights of the visible buildings in that direction.

Difficulty: 5 stars

Time Standards (highlight to view): Grandmaster = 9:45, Master = 25:00, Expert = 50:00

Solution: PDF and solving animation.

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. More Skyscrapers puzzles can be found in The Art of Puzzles, in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli, and in the e-book Skyscrapers by Ashish Kumar.

Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our week-0-discussion thread on the GMPuzzles Discord. If you are not yet part of this Discord community, use this link.

Takeya Saikachi’s warm-up puzzle, in which he places all possible odd clues symmetrically, will be good practice for the second grid today.

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

Theme: Possible Odds

Author/Opus: This is the 39th puzzle from our contributing puzzlemaster Takeya Saikachi.

Rules: Variation of Skyscrapers; each clue represents the sum of the heights of the visible buildings in that direction.

Difficulty: 1 star

Time Standards (highlight to view): Grandmaster = 0:20, Master = 0:35, Expert = 1:10

Solution: PDF and solving animation.

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. More Skyscrapers puzzles can be found in The Art of Puzzles, in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli, and in the e-book Skyscrapers by Ashish Kumar.

Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our week-0-discussion thread on the GMPuzzles Discord. If you are not yet part of this Discord community, use this link.

The last Number Placement playoff puzzle from the World Puzzle Championship was a Skyscrapers (Gap) puzzle with an empty cell in each row and column. How long will it take you to solve David Altizio’s puzzle?

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or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between number entry modes and a shading mode to mark the unused cells.)

Author/Opus: This is the 15th puzzle from guest contributor David Altizio.

Rules: Variation of Skyscrapers rules. Insert numbers into some cells of the grid so that each row and column of the grid contains the numbers from 1 to 5 once each and one gap. Each number in the grid represents the height of a building and the clues on the outside of the grid indicate how many buildings can be “seen” when looking from that direction. Taller buildings block the view of smaller buildings.

Estimated Difficulty: 1.5 stars

Solution: PDF for all Number Placement playoff puzzles.

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. More Skyscrapers puzzles can be found in The Art of Puzzles, in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli, and in the e-book Skyscrapers by Ashish Kumar.

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

Theme: Evens

Author/Opus: This is the 388th puzzle from our contributing puzzlemaster Grant Fikes.

Rules: Variation of Skyscrapers rules. Instead of their usual meaning, exterior clues indicate the height of one of the visible buildings that can be seen from that direction.

See also this example:

Difficulty: 1 star

Time Standards (highlight to view): Grandmaster = 0:50, Master = 1:20, Expert = 2:40

Solution: PDF and solving video.

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. More Skyscrapers puzzles can be found in The Art of Puzzles, in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli, and in the e-book Skyscrapers by Ashish Kumar.

PDF

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

Theme: Seven Times

Author/Opus: This is the 17th puzzle from guest contributor Salih Alan.

Rules: Standard Skyscrapers rules.

Difficulty: 2 stars

Time Standards (highlight to view): Grandmaster = 1:40, Master = 2:30, Expert = 5:00

Solution: PDF and solving video.

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. More Skyscrapers puzzles can be found in The Art of Puzzles, in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli, and in the e-book Skyscrapers by Ashish Kumar.

PDF

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

Theme: Three’s Company

Author/Opus: This is the 47th puzzle from our contributing puzzlemaster JinHoo Ahn.

Rules: Standard Skyscrapers rules.

Difficulty: 4 stars

Time Standards (highlight to view): Grandmaster = 8:30, Master = 11:00, Expert = 22:00

Solution: PDF and solving video.

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. More Skyscrapers puzzles can be found in The Art of Puzzles, in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli, and in the e-book Skyscrapers by Ashish Kumar.

PDF

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

Theme: Two Sandwich

Author/Opus: This is the 413th puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Standard Skyscrapers rules.

Difficulty: 3.5 stars

Time Standards (highlight to view): Grandmaster = 6:30, Master = 8:00, Expert = 16:00

Solution: PDF and solving video.

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. More Skyscrapers puzzles can be found in The Art of Puzzles, in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli, and in the e-book Skyscrapers by Ashish Kumar.

PDF

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

Theme: Am I Seeing Double?

Author/Opus: This is the 92nd puzzle from our contributing puzzlemaster Ashish Kumar.

Rules: Variation of Skyscrapers; each clue represents the sum of the heights of the visible buildings in that direction.

Difficulty: 3 stars

Time Standards (highlight to view): Grandmaster = 4:00, Master = 5:15, Expert = 10:30

Solution: PDF and solving video.

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. More Skyscrapers puzzles can be found in The Art of Puzzles, in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli, and in the e-book Skyscrapers by Ashish Kumar.

PDF

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

Author/Opus: This is the 233rd puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Standard Skyscrapers rules.

Difficulty: 3 stars

Time Standards (highlight to view): Grandmaster = 4:00, Master = 5:15, Expert = 10:30

Solution: PDF and solving video.

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. More Skyscrapers puzzles can be found in The Art of Puzzles, in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli, and in the e-book Skyscrapers by Ashish Kumar.

PDF

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

Theme: Doubled

Author/Opus: This is the 224th puzzle from our contributing puzzlemaster Murat Can Tonta.

Rules: Standard Skyscrapers rules.

Difficulty: 2 stars

Time Standards (highlight to view): Grandmaster = 2:00, Master = 2:30, Expert = 5:00

Solution: PDF and solving video.

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. More Skyscrapers puzzles can be found in The Art of Puzzles, in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli, and in the e-book Skyscrapers by Ashish Kumar.