Slitherlink vs Numberlink vs Train Tracks
A shopper who types “logic puzzle book” gets sudoku. These three are the listings that should interrupt that skip: a closed loop on dots, paths between matching numbers, and a track completed from row and column counts. The pencil is a line in all three. The first page is not.
This page owns that pick. It is not a generate walkthrough and not a how-to-solve lesson. The KDP logic shelf already lists these interiors next to region and placement types. The TPT and Etsy hubs already say what a worksheet and a pack have to be. Stay here when the question is which line job the Look Inside is selling.
Three clue languages, one pencil
If page one does not show which of those three jobs it is, the listing is selling the word “logic.” A loop on dots next to pair-paths next to a track grid is three products. Put them in one interior without saying collection and the buyer does not know which pencil they bought.
Slitherlink — one closed loop
Slitherlink prints a lattice of dots. Some faces carry a small digit. The solver draws one closed loop along the edges. Each digit counts how many of that face’s edges sit on the loop.
Look Inside has no cell grid. Dots and numbers. That is the whole point of the sample. A first page that looks like sudoku, or like a maze, is the wrong listing.
The key is the same lattice with the loop drawn heavier than the dots. Keep the dots dark in print. If they fade, the book is unpleasant to solve.
Eighteen grid topologies exist on the live product — rectangular, hexagonal, Cairo, Penrose, Hats, Spectres, and the rest. That is later catalog work. The first listing is still one closed loop on dots. Do not open a second title just to change the lattice.
Numberlink — matching pairs
Numberlink scatters matching endpoint pairs on an otherwise empty grid. The solver joins each pair with a path. Paths run on the grid, do not cross, and together fill every cell.
The blankness is the sample. Paired markers, mostly white space. The solved page is the opposite: winding lines. That makes the key section a second showcase, not an afterthought. Draw the paths heavier than the cell borders.
Endpoints default to numbers. Letters, colours, or images change the thumbnail. They do not change the pencil. Arukone is the same product, not a second shop listing.
Two solution rules sit in one module. Unique-solution boards stay at 8×8. A covering mode accepts any valid fill and goes to 15×15. Say which rule the book uses. Do not sell a large covering grid as a unique-logic title.
Train Tracks — one track from the counts
Train Tracks lays one continuous track from an entry on the left edge to an exit on the bottom. The numbers beside each row and column say how many cells in that line carry track. A few tiles print as givens. Entry and exit meet the frame. There are no arrow glyphs.
By default every generated board is guess-free and has one solution. That is a back-cover line you can print. The optional harder mode still has one solution, but reaching it may take a what-if guess. If a title uses that mode, say so in the listing.
Rails is the European name for the same puzzle. It is not a second SKU.
What Look Inside has to prove
On KDP the sample is the test. It has to be a real puzzle at print size, on a page that looks like the rest of the file. The Look Inside yardstick still applies. This page only names the three first pages.
- Slitherlink. Page one is dots and small digits. The key is the drawn loop. Not a digit-fill grid.
- Numberlink. Page one is paired endpoints on an empty grid. The key is the paths. Not a single loop, not a track.
- Train Tracks. Page one shows the counts outside the grid, the left-edge entry, the bottom exit, and any given tiles. The key is the completed track.
Every key on this chooser is a drawing. Drawn answers need weight, and they need pages. A 100-puzzle interior carries a real solutions section, not four grids in a corner. Puzzle book answer keys owns that convention.
One look per title. A book that opens on a loop and later drops pair-paths is two products. A mixed logic book is a different job — mixed puzzle books — and only honest if the title says collection. The default that sells is one mechanic.
A book, a pack, and a worksheet are still different products. The four-channel map owns that split. This page only stops you from putting three line jobs under one KDP title.
Not this chooser
Galaxies, Shikaku, and Queens split a grid or place pieces. Their first pages are dots, numbered rectangles, or empty regions — not a line. They do not belong in this ZIP.
Country Tour is a region-loop: one closed path that visits every cell and enters each region once. It is not Numberlink, and it is not a geography quiz. Mazes are a different family.
If you have not chosen a family yet, start with which puzzle type fits your audience.
Commercial rights for the finished pages you generate are part of the Puzzle Maker Pro license as stated on the homepage. That covers the books you sell. It does not pick the listing.
The whole point
Slitherlink, Numberlink, and Train Tracks share a pencil and nothing else that matters in Look Inside. One is a closed loop on dots. One is paths between matching pairs. One is a track completed from row and column counts. Pick the first page that can prove which. Leave the other two as their own titles.