Logic Puzzles
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- xkcd Forum Rules - Updated Nov. 13th 2012
by hermaj » Fri Nov 07, 2008 4:46 am UTC - 1 Replies
- 325093 Views
- Last post by hermaj
Fri Nov 07, 2008 4:47 am UTC
- xkcd Forum Rules - Updated Nov. 13th 2012
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- Logic Puzzles Rules - Update 2013
by TheTankengine » Wed Jun 20, 2007 6:38 pm UTC - 0 Replies
- 15090 Views
- Last post by TheTankengine
Wed Jun 20, 2007 6:38 pm UTC
- Logic Puzzles Rules - Update 2013
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- After You Post A Puzzle, Don't Edit it!
by jestingrabbit » Wed Nov 21, 2012 3:57 pm UTC - 2 Replies
- 5611 Views
- Last post by jestingrabbit
Wed Nov 21, 2012 6:26 pm UTC
- After You Post A Puzzle, Don't Edit it!
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- New spoiler policy.
by jestingrabbit » Mon Oct 01, 2007 8:32 pm UTC - 35 Replies
- 39576 Views
- Last post by MasterOfAll
Thu Nov 01, 2012 3:45 pm UTC
- New spoiler policy.
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- Decrypt Cyphertext
by katinkakun » Wed Apr 16, 2014 8:58 pm UTC - 0 Replies
- 33 Views
- Last post by katinkakun
Wed Apr 16, 2014 8:58 pm UTC
- Decrypt Cyphertext
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- Cyphertext Puzzle
by katinkakun » Wed Apr 16, 2014 8:33 pm UTC - 0 Replies
- 19 Views
- Last post by katinkakun
Wed Apr 16, 2014 8:33 pm UTC
- Cyphertext Puzzle
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- A very unconventional solution to the world’s most difficult
by Santa-Klaus » Thu Mar 27, 2014 1:52 am UTC - 27 Replies
- 1598 Views
- Last post by Who
Sat Apr 12, 2014 2:54 am UTC
- A very unconventional solution to the world’s most difficult
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- Please test an online puzzle game (based on Brainf**k)
by lorb » Mon Apr 07, 2014 3:26 pm UTC
- 14 Replies
- 586 Views
- Last post by Volcano99
Fri Apr 11, 2014 11:04 am UTC
- Please test an online puzzle game (based on Brainf**k)
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- Test-solve my puzzles, please
1, 2, 3, 4 by ArDeeJ » Sun Jun 16, 2013 3:35 pm UTC
- 159 Replies
- 23389 Views
- Last post by jedelmania
Mon Apr 07, 2014 9:45 am UTC
- Test-solve my puzzles, please
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- Infinite noughts and crosses
by snowyowl » Fri Apr 04, 2014 10:11 pm UTC - 3 Replies
- 445 Views
- Last post by Nitrodon
Sat Apr 05, 2014 7:24 pm UTC
- Infinite noughts and crosses
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- Coded Image
by Rhombic » Mon Jan 13, 2014 9:02 pm UTC
- 6 Replies
- 1401 Views
- Last post by elasto
Sun Mar 30, 2014 12:23 pm UTC
- Coded Image
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- Number substitution puzzle - multiplication
by Demki » Sat Mar 01, 2014 1:41 pm UTC
- 21 Replies
- 1789 Views
- Last post by Xias
Thu Mar 27, 2014 8:44 am UTC
- Number substitution puzzle - multiplication
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- The ambiguous clock
by snowyowl » Wed Mar 19, 2014 12:27 pm UTC - 4 Replies
- 799 Views
- Last post by orbik
Wed Mar 26, 2014 9:25 pm UTC
- The ambiguous clock
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- Playing 3D Tetris puzzle by interpreting 2D projections
by bs_observer » Sun Mar 23, 2014 10:23 am UTC - 2 Replies
- 425 Views
- Last post by bs_observer
Tue Mar 25, 2014 3:47 am UTC
- Playing 3D Tetris puzzle by interpreting 2D projections
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- Mother of All Puzzles
1, 2, 3by GeoffreyY » Fri Mar 08, 2013 12:14 pm UTC - 91 Replies
- 23728 Views
- Last post by Carmeister
Wed Mar 19, 2014 1:52 am UTC
- Mother of All Puzzles
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- Riddling: a puzzle game you all might like
by aquarius » Wed Mar 12, 2014 11:53 pm UTC - 2 Replies
- 808 Views
- Last post by aquarius
Sat Mar 15, 2014 11:35 am UTC
- Riddling: a puzzle game you all might like
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- Interpret this sequence 1893 900 5 1040 ...
by xkcud » Mon Oct 10, 2011 5:46 am UTC - 14 Replies
- 4180 Views
- Last post by PsiSquared
Fri Mar 14, 2014 1:01 am UTC
- Interpret this sequence 1893 900 5 1040 ...
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- The philosopher, the most intelligent man and the fish
1, 2by Rhombic » Sat Jan 18, 2014 9:31 pm UTC - 44 Replies
- 4667 Views
- Last post by BigNose
Mon Mar 10, 2014 2:17 pm UTC
- The philosopher, the most intelligent man and the fish
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- Find the final answer
by lamora92 » Thu Feb 27, 2014 6:40 am UTC - 9 Replies
- 1210 Views
- Last post by thefargo
Fri Mar 07, 2014 8:32 pm UTC
- Find the final answer
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- The Hardest Logic Puzzle Ever
by KnightExemplar » Mon Mar 03, 2014 3:50 am UTC - 3 Replies
- 883 Views
- Last post by Qaanol
Tue Mar 04, 2014 10:06 pm UTC
- The Hardest Logic Puzzle Ever
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- the poisoned wine
by phillip1882 » Wed Jan 29, 2014 3:21 am UTC - 27 Replies
- 2524 Views
- Last post by checkmate
Wed Feb 26, 2014 11:40 pm UTC
- the poisoned wine
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- The Waiter
by Thantsking » Mon Feb 24, 2014 4:00 am UTC - 2 Replies
- 807 Views
- Last post by jestingrabbit
Tue Feb 25, 2014 7:13 am UTC
- The Waiter
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- Find a set of numbers containing mine
by wraith » Fri Dec 06, 2013 12:37 pm UTC - 32 Replies
- 4142 Views
- Last post by wraith
Wed Feb 19, 2014 1:49 pm UTC
- Find a set of numbers containing mine
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- Crack the code
by maxpotier » Tue Dec 03, 2013 9:30 pm UTC - 2 Replies
- 1670 Views
- Last post by Frankz
Fri Feb 14, 2014 2:56 am UTC
- Crack the code
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- My write-up of the "Blue Eyes" solution (SPOILER A
1 ... 27, 28, 29by xkcd » Sat Apr 08, 2006 8:26 am UTC - 1152 Replies
- 236431 Views
- Last post by Lunch Meat
Tue Feb 11, 2014 8:37 pm UTC
- My write-up of the "Blue Eyes" solution (SPOILER A
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- Rotating Pieces: Solve My Game!
by krazykate » Tue Feb 04, 2014 3:46 pm UTC
- 12 Replies
- 1233 Views
- Last post by PeteP
Mon Feb 10, 2014 5:29 pm UTC
- Rotating Pieces: Solve My Game!
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- Prisoners disguised as guards
by wraith » Mon Oct 28, 2013 1:59 pm UTC - 29 Replies
- 3709 Views
- Last post by operator[]
Fri Jan 31, 2014 9:55 pm UTC
- Prisoners disguised as guards
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- The Coin Codes
by Rhombic » Sun Jan 05, 2014 10:06 pm UTC - 3 Replies
- 1324 Views
- Last post by jestingrabbit
Mon Jan 06, 2014 2:02 pm UTC
- The Coin Codes
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- Sum of three cards game
by wraith » Fri Dec 20, 2013 12:59 pm UTC - 6 Replies
- 2501 Views
- Last post by CharlieP
Thu Jan 02, 2014 11:44 am UTC
- Sum of three cards game
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- Three princesses
1 ... 9, 10, 11by Fleshpiston » Fri Jul 14, 2006 8:25 am UTC - 408 Replies
- 131336 Views
- Last post by firefly
Wed Dec 18, 2013 8:16 am UTC
- Three princesses
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- Flipping 50 consecutive cards
by wraith » Mon Dec 09, 2013 12:05 pm UTC - 15 Replies
- 2461 Views
- Last post by jedelmania
Thu Dec 12, 2013 10:29 am UTC
- Flipping 50 consecutive cards
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- Misplaced Christmas presents
by wraith » Wed Nov 27, 2013 12:50 pm UTC - 11 Replies
- 2824 Views
- Last post by tomtom2357
Sun Dec 01, 2013 12:42 pm UTC
- Misplaced Christmas presents
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- Partitioning the complete graph
by tomtom2357 » Wed Nov 27, 2013 10:56 am UTC - 0 Replies
- 1057 Views
- Last post by tomtom2357
Wed Nov 27, 2013 10:56 am UTC
- Partitioning the complete graph
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- Problem of the Universe
1, 2by tomtom2357 » Tue Jul 16, 2013 4:46 am UTC - 57 Replies
- 11179 Views
- Last post by tomtom2357
Wed Nov 20, 2013 1:47 am UTC
- Problem of the Universe
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- prisoner puzzle
by phillip1882 » Sat Nov 16, 2013 2:26 am UTC - 4 Replies
- 2022 Views
- Last post by jestingrabbit
Tue Nov 19, 2013 2:55 am UTC
- prisoner puzzle
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- Sequence of numbers
by Volcano99 » Mon Nov 18, 2013 8:38 am UTC - 2 Replies
- 1129 Views
- Last post by jaap
Mon Nov 18, 2013 9:54 am UTC
- Sequence of numbers
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- Alien abduction
by ejsantos » Wed May 22, 2013 12:59 pm UTC - 15 Replies
- 5492 Views
- Last post by Adam H
Fri Nov 15, 2013 4:21 pm UTC
- Alien abduction
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- The enigma of @YOUGAKUDAN_00
by mabeuf » Wed Oct 02, 2013 4:04 pm UTC - 31 Replies
- 8656 Views
- Last post by shoeboxer
Wed Nov 13, 2013 7:32 am UTC
- The enigma of @YOUGAKUDAN_00
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- Losing Strategy
by Wnderer » Wed Nov 06, 2013 9:03 pm UTC - 6 Replies
- 1795 Views
- Last post by Adam H
Thu Nov 07, 2013 3:15 pm UTC
- Losing Strategy
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- One of those IR book puzzle games
by traltixx » Tue Oct 29, 2013 3:54 am UTC - 5 Replies
- 1763 Views
- Last post by dudiobugtron
Wed Nov 06, 2013 8:39 pm UTC
- One of those IR book puzzle games
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- 3 Cryptic Riddles (I don't have the answers) .......
by Moonbeam » Wed Sep 07, 2011 5:52 pm UTC
- 31 Replies
- 9000 Views
- Last post by jestingrabbit
Wed Nov 06, 2013 7:22 pm UTC
- 3 Cryptic Riddles (I don't have the answers) .......
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- Secret Santa
1, 2by Goldstein » Fri Nov 26, 2010 3:18 pm UTC - 45 Replies
- 11186 Views
- Last post by pandasbox
Tue Nov 05, 2013 12:59 pm UTC
- Secret Santa
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- Crypto challenge
by theme » Sat Nov 02, 2013 5:26 pm UTC - 2 Replies
- 1318 Views
- Last post by theme
Sun Nov 03, 2013 7:58 am UTC
- Crypto challenge
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- Parking on a hill
1, 2by RivuletBlue » Wed Oct 16, 2013 10:41 pm UTC - 40 Replies
- 4655 Views
- Last post by dudiobugtron
Tue Oct 29, 2013 10:19 pm UTC
- Parking on a hill
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- Two cards - one ace. Advanced 7 grade problem
by wraith » Thu Oct 10, 2013 1:38 pm UTC - 21 Replies
- 3046 Views
- Last post by wraith
Fri Oct 25, 2013 12:46 pm UTC
- Two cards - one ace. Advanced 7 grade problem
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- My code want to be cracked.
by Chaest » Wed Oct 16, 2013 9:41 am UTC - 0 Replies
- 1380 Views
- Last post by Chaest
Wed Oct 16, 2013 9:41 am UTC
- My code want to be cracked.
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- Sum and Product Game
by tomtom2357 » Wed Sep 18, 2013 3:06 pm UTC - 37 Replies
- 6448 Views
- Last post by tomtom2357
Fri Oct 11, 2013 4:29 pm UTC
- Sum and Product Game
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- Non-transitive dice
by tomtom2357 » Sun Sep 29, 2013 3:39 pm UTC - 8 Replies
- 2773 Views
- Last post by tomtom2357
Thu Oct 10, 2013 12:26 am UTC
- Non-transitive dice
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- Pennies in Boxes
1, 2by undecim » Thu Sep 06, 2012 10:06 pm UTC - 71 Replies
- 26926 Views
- Last post by firesoul31
Thu Sep 26, 2013 11:37 pm UTC
- Pennies in Boxes
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- Can you crack my code? Version two
by Jumper_0 » Sun Apr 21, 2013 5:23 am UTC - 10 Replies
- 4748 Views
- Last post by snowyowl
Mon Sep 23, 2013 1:18 pm UTC
- Can you crack my code? Version two
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