Logic Masters Deutschland e.V.

Night on the Galactic Railroad

(Eingestellt am 19. August 2024, 00:04 Uhr von sfushidahardy)

The difficulty of this puzzle may vary greatly depending on your experience with loop puzzles. If you've never solved a loop puzzle, you might want to spend a moment to try and discover some "secrets" of the genre (akin to the better-known secrets of yin-yang puzzles).

  • Nurikabe-cave: shade some cells so that each orthogonally connected group of shaded cells touches the edge of the grid, and all unshaded cells form a single orthogonally connected group. Every 2x2 area contains at least one shaded cell.
  • Directed loop: draw a loop through the centers of some cells which only moves vertically or horizontally, and does not branch or cross itself. Additionally, the loop passes over every arrow in the indicated direction, must travel straight through shaded cells, and must turn 90 degrees through unshaded cells.

A 5x5 example to familiarize yourself with the rules.

Solve Night on the Galactic Railroad on Sudokupad.

Solve Night on the Galactic Railroad on Penpa+.

The name of the puzzle is a reference to a classic Japanese novel, 「銀河鉄道の夜」. The first few drafts of the puzzle had many arrows positioned in spiraling "galaxy" motifs, so I thought a loop through the clues was like a railway through the universe. However, in the final puzzle, almost all traces of galaxies have disappeared!

Lösungscode: The number of shaded cells in every row, top to bottom. (11 digits, no spaces.)

Zuletzt geändert am 19. August 2024, 00:15 Uhr

Gelöst von MaizeGator, kays, jkuo7, CHalb, Paletron, Jesper, Agent, Grothenlace, SeveNateNine, johnyzzh, ONeill, Piatato, radarvillage, meixia, SudokuHero, koXx, JustinTucker, parqueflick, OGRussHood, Nell Gwyn, goodcity, Uhu, LeiZ123321, puzzler05, widjo
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Kommentare

Zuletzt geändert am 11. September 2024, 17:19 Uhr

am 11. September 2024, 17:18 Uhr von parqueflick
This puzzle is full of lovely and satisfying logic. I hadn't solved a directional loop puzzle before, and I had a great time figuring out and applying some "secrets" as you term them. I have also just spent an enjoyable hour reading about Night on the Galactic Railroad and Kenji Miyazawa - thank you for the introduction!

am 25. August 2024, 20:50 Uhr von Piatato
Great ruleset and a fun puzzle!

am 19. August 2024, 21:26 Uhr von Jesper
Great ruleset, enjoyed it, thanks!

am 19. August 2024, 00:19 Uhr von MaizeGator
Excellent logical flow. The foreword is also very relevant. Even if you THINK you know the secrets of directional loops (like I did), it’s worth taking a second look to really internalize them. The puzzle flows very nicely if you do!

Schwierigkeit:4
Bewertung:96 %
Gelöst:25 mal
Beobachtet:6 mal
ID:000JFF

Variantenkombination Wegerätsel Färberätsel

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Lösungscode:

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