27 posts tagged with puzzle and logic.
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Boolosian logic

The Hardest Logic Puzzle Ever goes like this:
Three gods A, B, and C are called, in some order, True, False, and Random. True always speaks truly, False always speaks falsely, but whether Random speaks truly or falsely is a completely random matter. Your task is to determine the identities of A, B, and C by asking three yes-no questions; each question must be put to exactly one god. The gods understand English, but will answer all questions in their own language, in which the words for “yes” and “no” are “da” and “ja,” in some order. You do not know which word means which.
posted by the man of twists and turns on Nov 8, 2015 - 59 comments

I'm the treasure in the box

The annoying boxes puzzle: There are two boxes on a table, one red and one green. One contains a treasure. The red box is labelled "exactly one of the labels is true". The green box is labelled "the treasure is in this box." Can you figure out which box contains the treasure?
posted by Wolfdog on Sep 2, 2015 - 131 comments

Can you solve this puzzle?

Downstairs in a house are three identical on-off switches. One of them controls the lamp in the attic. The puzzle is to work out which switch controls the lamp. The rules are as follows. You are allowed to manipulate the switches all you like, and then you are allowed a single trip to the attic. How do you do it?
posted by growabrain on Jun 22, 2015 - 372 comments

The roads ahead are long and winding...

Alcazar is a neat little path-finding logic game. There are also printable puzzles, strategy tips and metapuzzles to be had. [more inside]
posted by Wolfdog on May 2, 2015 - 15 comments

0h n0, another time waster

0h n0 is a game of logical deduction where each dot in a grid can only exist in the same row or column as a certain number of like-colored dots. The game will give you specific pieces of information about how many like-colored dots a single dot can "see", and you must deduce the remaining grid of dots. It's from the same people who brought us the zen-like logic game 0h h1 (previously). [more inside]
posted by codacorolla on Mar 9, 2015 - 34 comments

Still Combining Numbers On A Grid To Get Bigger Numbers, But Different

Get 10 is a new browser game from veewo, creators of 1024.
posted by Rinku on Dec 9, 2014 - 31 comments


FFF: MMMMMM is a flash game that takes the game mechanics of the indie hit VVVVVV and transforms them from a fast-twitch platform game to a puzzle platformer. [more inside]
posted by lemuring on Apr 20, 2012 - 7 comments

Evil influence? Only for your productivity.

Masyu, also known as Pearls, is an NP-complete logic puzzle created by the makers of Sudoku. Brandon McPhail provides a few free puzzles to get your feet wet on his web site (Java applet). Once you've mastered those, UCLICK Games offers a free daily puzzle (Flash) with the past month of archives available too. [more inside]
posted by The Winsome Parker Lewis on Jan 18, 2012 - 28 comments

Logic. Do you speak it?

Impasse is a simple flash-based puzzle game that involves getting your object from point A to B.
  • Levels you complete can be scrolled through using "x" to move to the next level and "d" to return the level select button to the first level.
  • The browser saves your progress, so you can close your tab/browser and return to it later.

  • posted by lemuring on Jul 11, 2011 - 19 comments

    I shall call it... NAWNCO.

    A logic puzzle called NAWNCO.
    posted by lemuring on Apr 11, 2011 - 63 comments

    Picma Squared

    Picma Squared (flash, game) "You got your Picross in my Minesweeper!" "You got your Minesweeper in my Picross!" [more inside]
    posted by Ufez Jones on Apr 10, 2011 - 8 comments

    Logic Puzzles

    Since 1980, Nikoli^ has been in the business of creating many different variations of logic puzzles (such as the very popular Sudoku and Kakuro). Unfortunately, as they're stationed in Tokyo, their magazine is unavailable to most Americans.

    Luckily, over the decades they've inspired quite a few people to make their own puzzles and variants, including:
    posted by flatluigi on Feb 17, 2010 - 12 comments

    These logic puzzles are like, full of color, man.

    End of the decade flash fun: Picma Picture Enigmas.
    posted by Terminal Verbosity on Dec 31, 2009 - 4 comments

    bop the alligator

    DroidQuest, Gate and Logicly are modern logic puzzle games based on the classic educational games Rocky's Boots (1982) and Robot Odyssey (1984). [more inside]
    posted by speicus on Nov 2, 2009 - 22 comments

    If a train leaves Chicago at noon carrying 20 passengers, 5 of whom smoke, in 4 cars, what is the name of the conductor's dog?

    A nearly impossible logic puzzle. Other mindtwisting puzzles. More puzzles of varying difficulty (don't scroll down too far!). XKCD's take. (previously epic post Also: 1, 2)
    posted by desjardins on Jul 30, 2009 - 47 comments

    Revolutionary Semiconductor

    Friday Flash Fun*: Конструктор: Engineer of the People, in which you are an engineer working in a top-secret semiconductor facility called H3, designing top-secret integrated circuits based on specifications provided to you. *For certain values of 'fun'
    posted by daniel_charms on Mar 27, 2009 - 36 comments

    In the Two Rooms with black curtains near the station...

    Metafilter's Back Monday Flash Fun: Two Rooms is a logic game where you trigger switches to move barriers out of your way. [more inside]
    posted by schyler523 on Jan 26, 2009 - 9 comments

    The island where eye color can kill you.

    A mindbending logic puzzle. A thousand people on the island, 900 brown-eyed and 100 blue-eyed; anyone who learns their own eye color must kill themself the next day; a visitor mentions that there is a blue-eyed person on the island; what happens? Nothing, you say, because they already know that? Wrong. Further details at the Terry Tao post linked above, but don't scroll down below the boxed description unless you want hints and/or spoilers. [more inside]
    posted by languagehat on Feb 15, 2008 - 390 comments

    Logic puzzles

    A virtually unlimited supply of randomly-generated logic puzzles, in a variety of sizes and difficulties: Nonograms. Slither Link. Nurikabe. Bridges. Light Up.
    posted by Upton O'Good on Nov 28, 2007 - 18 comments

    Let's Do Lunch

    Let’s Do Lunch. (Previously and previously.)
    posted by Soup on Nov 22, 2007 - 26 comments

    Correct letters in wrong positions

    Use everyone's logic and vocabulary skills to figure out what the secret word is.
    posted by Blazecock Pileon on Jul 20, 2007 - 27 comments

    So you think you're smart?

    The Einstein Puzzle by Flowix Games is based on an old DOS game called Sherlock, which, in turn, was based on Einstein's (Supposed) Puzzle (Previously). No, it's not Friday yet, and no, it's not Flash. It's a really logical game, and it's really damn hard. I've only won once, and that was within the first few times of playing. If you find it hard to figure out what's going on, read THIS... It helped me to figure out EXACTLY what the hell was going on. The authors are Russian, and the help in the game may only serve to confuse you. ;) It's free, and runs on Windows, Mac, and Linux. I'm hooked on it, Dammit. :D
    posted by Vamier on Mar 22, 2007 - 32 comments

    Labor Intensive

    Labor Intensive is a new online puzzle extravaganza in the style of the MIT Mystery Hunt and the aforelinked Puzzle Boat. Appease the Gods by performing twelve puzzly labors. Good luck!
    posted by painquale on Sep 22, 2006 - 3 comments

    Friday Flash Fun

    3D Logic Connect the colors on the cube
    posted by Bezbozhnik on Jun 2, 2006 - 37 comments

    Who has the fish?

    Who has the fish? Einstein logic puzzle. If I can do it, you guys can.
    posted by swift on Aug 4, 2005 - 53 comments


    "WARNING!!! The puzzles on this site are very difficult, and most require the use of a good spreadsheet program in order to solve them. It will take many hours, perhaps days, to solve each puzzle..."
    posted by limitedpie on Aug 11, 2004 - 7 comments

    Get thee across the river!

    Japanese Flash logic test
    Get the family from one side of the river, to the other. [more inside]
    posted by plemeljr on Apr 8, 2004 - 28 comments

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