TappyPotato logic puzzles

Guides

Guides — puzzle rules and history | TappyPotato

Start with how this atlas is organized, then open the FAQ or a topic guide. After that, return to a type or category page.

Updated 2026-09-22

How to use this site: atlas and site index

Where to play lists hosts; How to play teaches rules. 82 types and 179 sites — don't scroll the home page forever.

FAQ index

FAQ index for navigating this atlas: portals, printables, Sudoku vs variants, solvers, Nikoli, contests, and topic guides.

First Sudoku: where to play, and how to use a hint

No fancy techniques. Open the Sudoku type page here, then pick one site you will return to.

Sudoku

Classic Sudoku feels thin: which variant first

Killer, X and jigsaw — and when not to stack four rules on day one.

Sudoku variants

Japanese pencil puzzles — beginners

Japanese pencil puzzles for beginners: start with Slitherlink and Nurikabe, then Kwon-Tom or puzz.link.

Japanese pencil puzzles

Nonograms: the picture is a side effect

Open the Nonogram type page here, then Nonograms.org or Griddlers. Start mono and small.

Nonogram / Picross

Paper instead of a screen: how to pick a printable

Answers, difficulty, grids per page. Krazydad, Nonogram PDFs, Kakuro sheets. We do not host PDFs.

Printable & PDF

When a solver helps (and when it ruins the grid)

Ask for the next step, not the fill. Read the type page here first, then open a tool.

Solvers & tools

Atlas FAQ — portals, print & freemium

Atlas FAQ: what TappyPotato indexes, All-in-one portals, Printable & PDF, and freemium tags.

Sudoku & variants — core techniques

Sudoku & variants: Killer, Jigsaw, Thermo, Arrow, X-Sudoku; 17-clue floor; X-Wing, pairs, Unique Rectangle.

Sudoku

Nikoli-style pencil puzzles

Nikoli-style pencil puzzles: Slitherlink, Nurikabe, Hashi, Masyu, Yajilin, Heyawake — text-free grid rules.

Japanese pencil puzzles

Arithmetic grids & Nonograms

Kakuro, KenKen, Skyscrapers, overlap shading, and related engines. Star Battle sits here for adjacency, not sums.

Number & arithmetic

Solvers, CSP & graph methods

Solvers, CSP & graph methods: inference vs backtracking, bitmasks, SAT, fish/AIC — how tool sites work.

Solvers & tools

WPF contests & handmade grids

WPF contests & handmade grids: Grand Prix scoring, hunt metas, community sites, and booklet archives.

Contests & federations

Printable grids — PDF & paper

Printable grids — PDF & paper: vector files, booklet keys, classroom blanks, weight and bleed.

Printable & PDF

Word play, cryptics & visual checks

Word play, cryptics & visual checks: dual clues, anagrams, lateral thinking, cryptograms, spot-the-difference.

Word & language puzzles

Advanced Sudoku patterns

Advanced Sudoku patterns: Skyscraper, wings, Empty Rectangle, Sue de Coq, Medusa, Exocet, Remote Pairs.

Sudoku
About this page
  • Last updated 2026-09-22
  • Source Editorial guide index maintained by TappyPotato
  • Audience Players choosing a topic guide before reading a full guide page
  • Covers List of available guides with short descriptions
  • Does not cover Full guide body text, hosted puzzles, worked solutions, third-party uptime guarantees
  • Not advice This page is puzzle reference content only. It does not constitute financial, legal, medical or other professional advice.
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