The Grey Labyrinth is a collection of puzzles, riddles, mind games, paradoxes and other intellectually challenging diversions. Related topics: puzzle games, logic puzzles, lateral thinking puzzles, philosophy, mind benders, brain teasers, word problems, conundrums, 3d puzzles, spatial reasoning, intelligence tests, mathematical diversions, paradoxes, physics problems, reasoning, math, science.

   
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Visitor Submitted Puzzles

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No new posts Sequence
38 Icarus 1483 Tue Nov 08, 2011 1:41 pm
ralphmerridew View latest post
No new posts Non-transitivity in City Square Off
3 mathgrant 339 Tue Nov 08, 2011 2:25 am
Zag View latest post
No new posts Another Word Puzzle SOLVED - New Puzzle SOLVED
21 Suspence 1007 Thu Oct 20, 2011 11:52 pm
Quailman View latest post
No new posts Save the World SOLVED - Save the President SOLVED
18 Suspence 964 Tue Oct 18, 2011 5:01 pm
Suspence View latest post
No new posts Science Center SOLVED
22 Suspence 998 Fri Oct 14, 2011 12:04 pm
Suspence View latest post
No new posts Worst. NFL Playoff team. Ever.
14 jms416 960 Thu Oct 13, 2011 4:48 am
bonanova View latest post
No new posts Guess the character with Akinator!
36 mathgrant 2570 Thu Oct 06, 2011 8:52 pm
Suspence View latest post
No new posts Beta testing a real life puzzle
15 impossibleroot 1295 Mon Oct 03, 2011 11:40 pm
Vagrant View latest post
No new posts My first Nonogram
2 Amb 400 Mon Sep 26, 2011 2:37 am
Amb View latest post
No new posts Puzzle in Real Life: Adding color to the cubes?
2 impossibleroot 357 Sun Sep 25, 2011 3:50 pm
impossibleroot View latest post
No new posts Puzzle in Real Life: 4 Letter Cubes
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49 impossibleroot 2450 Sat Sep 24, 2011 1:11 pm
impossibleroot View latest post
No new posts Romance on the railroad
8 bonanova 847 Sat Sep 17, 2011 3:22 pm
Zag View latest post
No new posts Checking in to The Hilbert Hotel
16 Chuck 1245 Sat Sep 03, 2011 2:14 am
BraveHat View latest post
No new posts Nine people
9 Ferris 886 Wed Aug 31, 2011 8:42 am
3iff View latest post
No new posts One for the combinatorics gurus
17 groza528 1298 Tue Aug 30, 2011 9:44 pm
Thok* View latest post
No new posts The Medical Test
13 Gomez 1614 Fri Aug 26, 2011 5:52 pm
jesternl View latest post
No new posts Logic puzzle ?
3 undecidedlyme 649 Fri Aug 26, 2011 7:53 am
piczzle View latest post
No new posts Misheard Lyrics Game
25 LoudmouthLee 2495 Wed Aug 24, 2011 3:46 pm
Sentran View latest post
No new posts The Pirate Puzzle thread
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138 Sentran 6303 Fri Aug 12, 2011 10:47 pm
Scurra View latest post
No new posts Motown
7 Laramie 726 Thu Aug 11, 2011 4:45 pm
Zag View latest post
No new posts Two Number Grids of differing difficulty
2 undecidedlyme 541 Thu Aug 11, 2011 3:39 am
itisally View latest post
No new posts Fill in the Grid
6 undecidedlyme 770 Mon Aug 08, 2011 7:30 pm
undecidedlyme View latest post
No new posts Really Hard Puzzle
7 referee 954 Mon Aug 08, 2011 1:32 pm
lostdummy View latest post
No new posts Jailbirds
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50 Silversunset 3485 Sun Aug 07, 2011 12:37 am
undecidedlyme View latest post
No new posts Hour Maze
3 Mike Reilly 631 Tue Aug 02, 2011 3:21 pm
Zag View latest post
No new posts Magicalchemist
5 sixleggedspider 1035 Sun Jul 31, 2011 1:31 pm
Suspence View latest post
No new posts Another Fork in the Road
7 Lepton 1289 Thu Jul 28, 2011 3:17 pm
bonanova View latest post
No new posts Some original riddles
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285 Zag 11198 Thu Jul 21, 2011 4:47 pm
Jack_Ian View latest post
No new posts More Spoonerisms
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162 Suspence 9852 Wed Jul 06, 2011 5:39 pm
Jack_Ian View latest post
No new posts Spoonerism Puzzle
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45 Zag 3854 Fri Jun 17, 2011 3:57 pm
Suspence View latest post
No new posts Guess the Movie! (audio) 4 new clips, adjusted rules
28 Samadhi 3136 Sun Jun 05, 2011 8:28 pm
Samadhi View latest post
No new posts Six Squares
10 Lepton 1064 Mon May 09, 2011 10:29 am
Lepton* View latest post
No new posts More Tiles Inside than Around?
21 Crlaozwyn 1562 Thu Apr 14, 2011 6:16 pm
groza528 View latest post
No new posts Roman Forumlae
19 lexprod 1343 Wed Apr 13, 2011 6:01 am
Amb View latest post
No new posts Ungoogleable.
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61 Chaz 5422 Mon Apr 11, 2011 4:54 pm
Termital View latest post
No new posts FBI asks public for help...
2 Icarus 663 Sun Apr 03, 2011 1:07 am
JohnP View latest post
No new posts Filmwise Invisibles
5 Sentran 1028 Fri Apr 01, 2011 7:53 pm
jesternl View latest post
No new posts An easier probability question on [0,1]
5 Lepton 1158 Wed Mar 30, 2011 4:16 pm
mith View latest post
No new posts Tiling hexagonal patterns
3 ralphmerridew 735 Sat Mar 19, 2011 6:06 pm
ralphmerridew View latest post
No new posts 31 or die
3 bonanova 808 Wed Mar 16, 2011 9:48 am
lostdummy View latest post
No new posts A puzzle solvable only thru google...
20 ctrlaltdel 1975 Fri Mar 04, 2011 1:44 pm
ctrlaltdel View latest post
No new posts Pole bending
2 Changabooniggiwan 760 Fri Feb 25, 2011 7:36 pm
ctrlaltdel View latest post
No new posts I'm not poetic about a bout (11)
24 Jack_Ian 1934 Thu Feb 24, 2011 3:29 pm
Jack_Ian View latest post
No new posts Two digital clocks
18 MatthewV 2144 Fri Feb 18, 2011 12:34 pm
lostdummy View latest post
No new posts Sliding-Block Chess Puzzle
12 Coyote 1394 Tue Feb 15, 2011 12:20 pm
lostdummy View latest post
No new posts Multi-solutions anti-terrorist logic puzzle
8 Arnoldino 1204 Mon Feb 14, 2011 9:56 am
Arnoldino View latest post
No new posts Lateral: Making bad choices
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83 jatill 4134 Wed Feb 09, 2011 11:00 pm
Chaz View latest post
No new posts MIT Mystery Hunt 2011
11 mith 1035 Mon Jan 17, 2011 4:01 am
LordKinbote View latest post
No new posts Christmas Conundrum
2 jesus_saves 760 Fri Dec 24, 2010 11:14 am
PuzzleScot View latest post
No new posts Lateral: The Printer
10 lexprod 1128 Sat Dec 11, 2010 1:03 am
lexprod View latest post
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