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Tentaisho

Updated on (created ) — Filed under: GESAKU List Paper Ported Puzzle symmetry territory
Divide the map into point-symmetric territories. each territory must contain exactly one star, which marks its point of symmetry.

Based on ruleset by ゲサク (GESAKU)

First seen (2001) at Puzzle Communication Nikoli 96

This is an example puzzle - tap to interact!

Each territory contains exactly one star.

No line can overlap with a star.

Each territory should be point-symmetric, by a rotation of 180 degrees around its star.

Solved!
Rule panels by justkirb on 18/09/2024

ゲサク (GESAKU) composed the ruleset and first puzzles of Tentaisho (2001), shared at Puzzle Communication Nikoli, 96, alongside many other original paper puzzles. This ruleset is also known as Galaxies, Spiral Galaxies and Sym-a-Pix.

In 2024 Pedro released the Tentaisho interactive app, leveraging the Kudamono Editor system. Pedro derived the programming logic, decided on colours & input modes and created all graphic assets, by tracing SVG paths. Rule panels by justkirb on 18/09/2024.

All puzzles listed on this page have a single, unique solution. Brand-new puzzles are proudly submitted by their authors regularly, while historic puzzles gain a new life in the interactive Kudamono format: here transcribed for the first time, with permission from each author, on a unit-, genre- or general basis.

Note: Black and white stars are interchangeable; but for artistic purposes, black-star regions can be used to reveal a hidden picture.

Depending on the desired symmetry, different star types are available:

  • 2-fold symmetry stars (presented with 4 arms, 2 different lengths)
  • 3-fold symmetry stars (3 equal arms)
  • 6-fold symmetry stars (6 equal arms)
  • any symmetry stars (presented as 5-armed stars)
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Start with a blank page (new Tentaisho puzzle).

Detailed editing instructions and shortcuts can be found at the manual.

The following variants are suggested: hex, 120-degrees and tatami.

For more information about global variants, and how to combine multiple variants in a single puzzle, please see the variants page.

The following custom insertion shortcuts apply to Tentaisho:

Keyboard shortcuts for Tentaisho (S = solving, E = editing, S/E = both solving and editing )
Glyph When Submode Shortcut Description
www.w3.org/2000/svg'> S—-A → Uauto mode: auto-choose submode based on gesture type and location
www.w3.org/2000/svg'> SlineL → Iedge line (solve): drag or click to draw definitive edge line (solve)
www.w3.org/2000/svg'> EsymbolXAbsent tile: click or drag to place definitive symbol Absent tile
www.w3.org/2000/svg'> EsymbolBTentaisho black 2 centre: click or drag to place definitive symbol Tentaisho black 2 centre
www.w3.org/2000/svg'> EsymbolWTentaisho white 2 centre: click or drag to place definitive symbol Tentaisho white 2 centre
www.w3.org/2000/svg'> Esymbol3Tentaisho black 3 centre: click or drag to place definitive symbol Tentaisho black 3 centre
www.w3.org/2000/svg'> Esymbol3Tentaisho white 3 centre: click or drag to place definitive symbol Tentaisho white 3 centre
www.w3.org/2000/svg'> Esymbol3Tentaisho black 6 centre: click or drag to place definitive symbol Tentaisho black 6 centre
www.w3.org/2000/svg'> Esymbol3Tentaisho white 6 centre: click or drag to place definitive symbol Tentaisho white 6 centre
www.w3.org/2000/svg'> Esymbol5Tentaisho black any centre: click or drag to place definitive symbol Tentaisho black any centre
www.w3.org/2000/svg'> Esymbol5Tentaisho white any centre: click or drag to place definitive symbol Tentaisho white any centre
www.w3.org/2000/svg'> S/Eaux lineDcontiguous tile marks: Click or drag to add contiguous aux lines
www.w3.org/2000/svg'> S/Eaux lineS → Ksketch line (edge): drag or click to sketch auxiliary line

Pressing an exclusive editing shortcut while solving, or vice-versa, causes a switch into that context. In contrast, shared shortcuts cause no switch, but are instead chosen to match the current context.

To copy the right url, simply follow the button sequence (export) → (link).

Likewise, a puzzle image may be exported via (export) → (picture).

Made a puzzle that you'd like to list here at Pedro's Works? Simply follow the Submission Guide!

When sharing a Tentaisho link on other social networks or across the fediverse please also include the hastag #KudamonoEditor in the post. Including the puzzle picture will usually enhance your post.

This table lists external sites and databases referencing Tentaisho.

Interlinks - other sites and databases listing this puzzle genre
Site Link Comment
Janko.atTentaisho pageOtto Janko has a page for Tentaisho. These pages often include an interactive applet for puzzle solving.
PuzzleSquareJPTentaishoyou may also share your Tentaisho puzzles at PuzzleSquareJP: please include the hashtag #KudamonoEditor in the puzzle description
WPC Wikientry for TentaishoThe unofficial wikipedia of the World Puzzle Championship has information about Tentaisho
Simon TathamTentaisho (also here)Simontatham's open source Puzzle Collection contains this genre (renamed).
Puzzle PuretentaishoThe Puzzle Pure family of tools (pzv.jp, puzz.link, pzprxs.vercel.app, etc…) supports this genre. There may be some non-variant puzzles listed at the database
Grandmaster PuzzlesTentaisho puzzlesGrandmaster Puzzles regularly publishes high-quality Tentaisho handcrafted puzzles by various authors.
KrazydadTentaishoJim Bumgardner (krazydad) provides printable computer-generated Tentaisho puzzle sets for free
puzzlephilTentaishoPuzzlephil includes Tentaisho among its featured genres DE .
Puzzleteam's sitesTentaishoPuzzleteam provides daily computer-generated Tentaisho puzzles at their family of websites.
WikipediaTentaishoThe English Wikipedia contains an article about Tentaisho
PuzzleMadnessTentaishoPuzzleMadness provides daily computer-generated Tentaisho puzzles in 3 difficulties.
Any Puzzle MediaTentaishoDr Gareth Moore sells Tentaisho puzzles for periodicals
Sorted PuzzlesTentaishoNidhi Grover, from India, has an archive with some Tentaisho puzzles, and may have generated Tentaisho puzzle books for sale on Amazon
QuixlerTentaishoTentaisho is present in Quixler's portfolio
NoqTentaisho editor and solverthe Noq solver can solve Tentaisho puzzles using a custom editor
gridgames.appTentaishoThe gridgames.app contains daily Tentaisho puzzles of easy, medium and hard difficulty.
puzzlefountainGalassieAlberto fabris fornisce istruzioni ed esempi per Tentaisho in lingua italiana it

Please with any issues and suggestions.

There are specific instructions for live conflict highlighting and input issues, for improving the rule panels or reporting non-uniquenesses.

For any other bugs, please:

  • describe what you were trying to do,
  • what happened instead, and
  • send the current url (plus any visible error logs and possibly, supplementary screenshots).

You may check whether your bug is already covered by the unit tests (it may take a few seconds before the page loads fully). Any yellow boxes indicate a failed test. "Performance issues" currently indicate all passed tests, slow or not.

If you find a situation where the live conflict highlighter is not working as you'd expect (e.g. too aggressive, incorrect), please send a small test case url plus a brief explanation of what should be happening instead.

A good test case includes the smallest possible board, with the fewest possible elements, that is still able to unambiguously reproduce the issue.

For interface issues related input modes, or more generally to clicking/touching/dragging, keyboard shortcuts, etc… please submit an input test case, as detailed in the Inputs Initiative.

For simple typos/rewordings, a short email suffices. For more substantial changes, please refer to the rule panels guidelines.

If you find a non-uniqueness in one of the puzzles, please first check whether you are able to contact the puzzle author directly to request a fix.

If that seems impractical, please submit either:

  • a corrected, unique puzzle url (with solution), if you are able to suggest a fix (preferred); or
  • a puzzle url solved up to the point where the puzzle stops being unique; or
  • multiple urls (one per solution)
2024-09-18 Tentaisho 天体ショ rule panels were created by justkirb in record speed - thank you! 2024-09-18 PinkHoodie sent 2 new puzzles for rollout, and transcribed 6 classics plus 2 puzzles using suggested variant tatami - thank you!! 2024-10-05 puzzletters PinkHoodie sent 1 Tentaisho 天体ショ puzzle using variant territory-symmetry-mirror! 2024-12-03 Tentaisho 天体ショ was expanded with multiple star types, one per symmetry, particularly for hex . Thanks Chiel Beenhakker (bakpao) for sparking this idea and for noticing an error-checkign issue, corrected (cause: numeric error)