# Logic Puzzles CA

> Free online logic puzzles and brain games — 30+ hand-crafted puzzle types including Sudoku, Nonograms, KenKen, Minesweeper, and Crowns. Every puzzle has a unique solution reachable by pure deduction (no guessing). Playable instantly in any browser with no account, no download, and no paywall. Printable versions and iOS/Android apps are available for several puzzles.

Each game page below explains the rules, solving strategies, common mistakes, history, and FAQ for that puzzle type, and lets you play it directly in the browser.

## Games

- [Aquarium](https://logicpuzzles.ca/games/aquarium): Water-filling logic puzzle where gravity constrains every deduction.
- [Battleships](https://logicpuzzles.ca/games/battleships): Solitaire Battleships puzzles online for free
- [Binary Sudoku+](https://logicpuzzles.ca/games/binary-sudoku-plus): Fill grids with 0s and 1s under row/column balance constraints.
- [Block Merge](https://logicpuzzles.ca/games/block-merge): Block Merge online for free
- [Butterfly Mahjong](https://logicpuzzles.ca/games/butterfly-mahjong): Butterfly Mahjong online for free
- [Color Flood](https://logicpuzzles.ca/games/palette-path): Connect matching colors while filling the entire board.
- [Color Links](https://logicpuzzles.ca/games/color-links): Color Links (Numberlink) online for free
- [Crowns](https://logicpuzzles.ca/games/crowns): Symmetry-based N-Queens-style grid puzzle solved with pure deduction.
- [Cryptograms](https://logicpuzzles.ca/games/cryptograms): Cryptograms online for free
- [Daily Logic Puzzles](https://logicpuzzles.ca/games/daily-logic-puzzles): A fresh set of bite-sized logic challenges every day.
- [Dominosa](https://logicpuzzles.ca/games/dominosa): Dominosa puzzles online for free
- [Dot Stream](https://logicpuzzles.ca/games/dot-stream): Path-finding puzzles based on connecting dots through the grid.
- [Enclose Fox](https://logicpuzzles.ca/games/enclose-fox): Daily pen-building puzzle: enclose the fox with limited walls.
- [Euchre](https://logicpuzzles.ca/games/euchre): Euchre online for free
- [Final Phrase](https://logicpuzzles.ca/games/final-phrase): Final Phrase online for free
- [Futoshiki](https://logicpuzzles.ca/games/futoshiki): Futoshiki puzzles online for free
- [Galaxies](https://logicpuzzles.ca/games/galaxies): Galaxies (Tentai Show) puzzles online for free
- [KenKen](https://logicpuzzles.ca/games/kenken): Arithmetic-cage logic puzzle blending Sudoku placement with math.
- [Kurodoku](https://logicpuzzles.ca/games/kurodoku): Kurodoku puzzles online for free
- [Light Up](https://logicpuzzles.ca/games/light-up): Light Up (Akari) puzzles online for free
- [LITS](https://logicpuzzles.ca/games/lits): LITS puzzles online for free
- [Logic Grid Puzzles](https://logicpuzzles.ca/games/logic-grid-puzzles): Logic Grid Puzzles online for free
- [Medieval Word Twister](https://logicpuzzles.ca/games/medieval-word-twister): Medieval Word Twister online for free
- [Minesweeper](https://logicpuzzles.ca/games/minesweeper): Minesweeper online for free
- [Mosaic](https://logicpuzzles.ca/games/mosaic): Mosaic (Fill-a-Pix) puzzles online for free
- [Nonograms](https://logicpuzzles.ca/games/nonograms): Picture logic puzzles (Picross/Griddlers) solved from number clues.
- [NoriNori](https://logicpuzzles.ca/games/norinori): NoriNori puzzles online for free
- [Number Merge](https://logicpuzzles.ca/games/number-merge): Number Merge online for free
- [Nurikabe](https://logicpuzzles.ca/games/nurikabe): Nurikabe puzzles online for free
- [Pipes](https://logicpuzzles.ca/games/pipes): Pipes (Plumber) puzzles online for free
- [Renzoku](https://logicpuzzles.ca/games/renzoku): Renzoku puzzles online for free
- [Skyscrapers](https://logicpuzzles.ca/games/skyscrapers): Skyscrapers puzzles online for free
- [Slant](https://logicpuzzles.ca/games/slant): Slant (Gokigen Naname) puzzles online for free
- [Slider Puzzle](https://logicpuzzles.ca/games/slider-puzzle): Slider Puzzle online for free
- [Slime Sweeper](https://logicpuzzles.ca/games/slime-sweeper): Slime Sweeper online for free
- [Solitaire Pro Collection](https://logicpuzzles.ca/games/solitaire-pro-collection): Klondike, FreeCell, Spider, TriPeaks, Pyramid, and Golf solitaire.
- [Sudoku](https://logicpuzzles.ca/games/sudoku): Sudoku online for free
- [Tents & Trees](https://logicpuzzles.ca/games/tents-and-trees): Tents & Trees puzzles online for free
- [Thermometers](https://logicpuzzles.ca/games/thermometers): Thermometer puzzles online for free
- [Word Ladder](https://logicpuzzles.ca/games/word-ladder): Word Ladder puzzles online for free
- [Word Wheel](https://logicpuzzles.ca/games/word-wheel): Word Wheel online for free
- [Yin-Yang](https://logicpuzzles.ca/games/yin-yang): Yin-Yang puzzles online for free

## Browse

- [All Logic Games](https://logicpuzzles.ca/logic-games): The full collection of grid-based deduction puzzles
- [Word Games](https://logicpuzzles.ca/word-games): Word Wheel, Word Ladder, and other vocabulary puzzles
- [Card Games](https://logicpuzzles.ca/card-games): Solitaire variants and Euchre
- [Printable Puzzles](https://logicpuzzles.ca/printable/sudoku): Downloadable PDF puzzles (Sudoku, Crowns, Nonograms, KenKen, Aquarium, Tents & Trees, Binary Sudoku+)
- [Mobile Apps](https://logicpuzzles.ca/apps): iOS and Android versions of our puzzles
- [FAQ](https://logicpuzzles.ca/faq): Rules, devices, accounts, and puzzle-design questions
- [About](https://logicpuzzles.ca/about): Who builds these puzzles and why

## Recent Blog Posts

- [Why the Answer Comes When You Walk Away](https://logicpuzzles.ca/blog/why-the-answer-comes-when-you-walk-away): You stare at a puzzle for ten minutes and see nothing. You come back the next morning and the move is simply there. That experience is real, measurable, and one of the best reasons to solve daily.
- [Six Sextillion Grids: The Mathematics of Sudoku](https://logicpuzzles.ca/blog/six-sextillion-grids-the-mathematics-of-sudoku): There are 6,670,903,752,021,072,936,960 valid Sudoku grids, no puzzle can have fewer than 17 clues, and your morning solve is secretly graph theory. A tour of the mathematics hiding in 81 cells.
- [From Euler to Nikoli: A Brief History of the Logic Puzzle](https://logicpuzzles.ca/blog/from-euler-to-nikoli-a-history-of-the-logic-puzzle): The grid you solved this morning is the descendant of an emperor's turtle, a mathematician's officers, a retired architect in Indianapolis, and a Tokyo publisher named after a racehorse.
- [What Daily Puzzles Do to Your Brain](https://logicpuzzles.ca/blog/what-daily-puzzles-do-to-your-brain): Brain training was oversold, then over-debunked. Here is what the research actually says about a daily puzzle habit — the real benefits, the honest limits, and why the daily part matters most.
- [What AI Actually Does in Game Development](https://logicpuzzles.ca/blog/what-ai-actually-does-in-game-development): Artificial intelligence has been part of games since Pac-Man. Here is an honest tour of what it really does behind the scenes today — and what still belongs to human designers.
- [The Grid as a Garden](https://logicpuzzles.ca/blog/the-grid-as-a-garden): A puzzle is not a battlefield to conquer. It is a garden to tend — a space where patience, attention, and care produce something orderly and beautiful from an initial tangle of possibilities.
- [When Stuck Is the Point](https://logicpuzzles.ca/blog/when-stuck-is-the-point): We treat being stuck as a problem to escape. But the stuck moment — the pause before insight — is where the deepest learning happens. Being stuck is not the obstacle. It is the work.
- [The Language of Logic](https://logicpuzzles.ca/blog/the-language-of-logic): Logic is a language, and like any language, it must be practiced to become fluent. Puzzles are the conversation that makes you fluent in reasoning.
- [Puzzles and the Present Moment](https://logicpuzzles.ca/blog/puzzles-and-the-present-moment): A logic puzzle demands your full attention. Not yesterday, not tomorrow — right now, this cell, this constraint. Puzzles are one of the few activities that reliably pull you into the present.
- [The Quiet Joy of Completion](https://logicpuzzles.ca/blog/the-quiet-joy-of-completion): In a world of endless feeds and infinite content, there is something radical about finishing. A completed puzzle is a rare thing: a task with a definite end.
- [Thinking in Layers](https://logicpuzzles.ca/blog/thinking-in-layers): The best puzzle solvers do not think about one thing at a time. They think in layers — holding multiple constraints, multiple possibilities, and multiple levels of reasoning simultaneously.
- [Why Hard Puzzles Feel Good](https://logicpuzzles.ca/blog/why-hard-puzzles-feel-good): Difficulty is not the enemy of enjoyment. It is the source of it. The puzzles that challenge us most are the ones that satisfy us most deeply.
- [The Art of Starting Over](https://logicpuzzles.ca/blog/the-art-of-starting-over): Restarting a puzzle is not failure. It is the decision to approach a problem fresh, unencumbered by mistakes you have already learned from. Starting over is its own skill.
- [Constraints as Creative Freedom](https://logicpuzzles.ca/blog/constraints-as-creative-freedom): We think of constraints as limitations. But in puzzles and in life, the right constraints do not restrict creativity — they enable it by narrowing the infinite to the possible.
- [The Puzzle as a Mirror](https://logicpuzzles.ca/blog/the-puzzle-as-a-mirror): Every puzzle reflects your thinking back to you — your habits, your shortcuts, your blind spots. Solving is not just logic. It is self-observation.

## Optional

- [Full sitemap](https://logicpuzzles.ca/sitemap.xml)
- [Press kit](https://logicpuzzles.ca/press)
- [Contact](https://logicpuzzles.ca/contact)