Advanced solving techniques
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- Help with a proof?
1, 2by Sudtyro2 » Tue Nov 26, 2013 9:40 pm - 16 Replies
- 3572 Views
- Last post by JC Van Hay
Sat Dec 07, 2013 2:05 pm
- Help with a proof?
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- Denis Berhtier Whip 4dot1 in BigSudoku Python Code
by RichardGoodrich » Mon Nov 11, 2013 2:29 am - 1 Replies
- 1542 Views
- Last post by RichardGoodrich
Mon Nov 11, 2013 4:13 pm
- Denis Berhtier Whip 4dot1 in BigSudoku Python Code
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- Understanding Denis Berthier Whips
by RichardGoodrich » Mon Nov 11, 2013 1:55 am - 2 Replies
- 2594 Views
- Last post by RichardGoodrich
Mon Nov 11, 2013 3:39 am
- Understanding Denis Berthier Whips
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- Chain Notation in my Trace
by RichardGoodrich » Sun Nov 10, 2013 4:11 am - 5 Replies
- 1780 Views
- Last post by RichardGoodrich
Sun Nov 10, 2013 11:54 pm
- Chain Notation in my Trace
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- ALS notation
by Marty R. » Fri Oct 18, 2013 7:57 pm - 4 Replies
- 1655 Views
- Last post by daj95376
Sun Oct 20, 2013 4:17 pm
- ALS notation
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- a new (?) view of fish (naked or hidden)
1 ... 4, 5, 6by arcilla » Fri Nov 03, 2006 6:55 pm - 85 Replies
- 35052 Views
- Last post by David P Bird
Sat Sep 21, 2013 11:31 pm
- a new (?) view of fish (naked or hidden)
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- The NoFish List
1, 2, 3by David P Bird » Thu Aug 22, 2013 9:46 pm - 31 Replies
- 5539 Views
- Last post by David P Bird
Thu Sep 12, 2013 2:19 pm
- The NoFish List
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- Would you call this pattern an exocet?
by sultan vinegar » Thu Aug 29, 2013 1:07 am - 6 Replies
- 1643 Views
- Last post by sultan vinegar
Fri Aug 30, 2013 10:36 am
- Would you call this pattern an exocet?
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- Fish Bones
by David P Bird » Mon Aug 19, 2013 11:11 am - 0 Replies
- 2413 Views
- Last post by David P Bird
Mon Aug 19, 2013 11:11 am
- Fish Bones
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- Rating rules / Puzzles. Ordering the rules
1 ... 8, 9, 10by denis_berthier » Sun Mar 30, 2008 10:01 am - 148 Replies
- 40316 Views
- Last post by denis_berthier
Mon Aug 12, 2013 4:40 pm
- Rating rules / Puzzles. Ordering the rules
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- About the arithmetic of Ultimate Fish
1, 2by Obi-Wahn » Thu Feb 01, 2007 9:52 pm - 29 Replies
- 12502 Views
- Last post by blue
Wed Aug 07, 2013 10:24 am
- About the arithmetic of Ultimate Fish
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- Finned X-Wing With Empty Rectangle
by civiliza » Fri Aug 02, 2013 10:00 am - 4 Replies
- 1854 Views
- Last post by civiliza
Mon Aug 05, 2013 12:17 pm
- Finned X-Wing With Empty Rectangle
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- Sudoku on paper without pencilmarks
1, 2, 3by Shazbot » Fri Dec 02, 2005 6:36 am - 42 Replies
- 20172 Views
- Last post by Smythe Dakota
Sun Aug 04, 2013 4:50 pm
- Sudoku on paper without pencilmarks
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- Using Multi-Sector Locked Sets
1, 2, 3by David P Bird » Thu Jun 27, 2013 10:13 pm - 40 Replies
- 8023 Views
- Last post by champagne
Wed Jul 31, 2013 3:26 pm
- Using Multi-Sector Locked Sets
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- The Sudoku grey zone
1, 2, 3by denis_berthier » Mon May 13, 2013 10:05 am - 30 Replies
- 15523 Views
- Last post by denis_berthier
Fri Jul 26, 2013 7:33 am
- The Sudoku grey zone
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- exotic patterns below the potential hardest
1, 2by champagne » Sat Jun 22, 2013 5:44 am - 26 Replies
- 3699 Views
- Last post by champagne
Mon Jul 15, 2013 7:57 am
- exotic patterns below the potential hardest
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- Will an XY Chain Always Produce A Turbot?
by civiliza » Thu Jul 11, 2013 1:45 pm - 5 Replies
- 1648 Views
- Last post by daj95376
Fri Jul 12, 2013 5:12 pm
- Will an XY Chain Always Produce A Turbot?
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- An Almost APE?
by Sudtyro2 » Fri Jun 07, 2013 3:09 pm - 3 Replies
- 1577 Views
- Last post by eleven
Sun Jun 09, 2013 10:32 am
- An Almost APE?
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- Pattern-based classification of (hard) puzzles
1 ... 5, 6, 7by denis_berthier » Tue Mar 20, 2012 10:03 am - 96 Replies
- 19175 Views
- Last post by denis_berthier
Sun Jun 02, 2013 4:06 am
- Pattern-based classification of (hard) puzzles
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- Non-standard pencil marks
by dokusan » Thu Jan 03, 2013 1:08 am
- 8 Replies
- 3082 Views
- Last post by RichardGoodrich
Fri May 03, 2013 3:46 am
- Non-standard pencil marks
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- x-cycle, y-cycle & 3D-Medusa
1, 2, 3by Jeff » Tue Dec 13, 2005 2:32 pm - 33 Replies
- 13304 Views
- Last post by RichardGoodrich
Wed May 01, 2013 3:49 am
- x-cycle, y-cycle & 3D-Medusa
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- New Elimination for 3D Medusa(?) with an ALS
1, 2by mturner » Fri Mar 15, 2013 4:26 am - 20 Replies
- 5148 Views
- Last post by daj95376
Mon Mar 18, 2013 6:39 am
- New Elimination for 3D Medusa(?) with an ALS
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- Sint Probability
by weng » Fri Feb 22, 2013 6:09 pm - 3 Replies
- 1817 Views
- Last post by weng
Fri Mar 01, 2013 7:22 pm
- Sint Probability
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- Question about Forcing Chains
by ArkieTech » Sat Jan 26, 2013 4:59 pm - 8 Replies
- 1632 Views
- Last post by daj95376
Sun Jan 27, 2013 1:08 am
- Question about Forcing Chains
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- Some thoughts on Eureka notation
by ArkieTech » Sat Jan 05, 2013 4:15 pm - 9 Replies
- 2298 Views
- Last post by ArkieTech
Mon Jan 07, 2013 1:09 pm
- Some thoughts on Eureka notation
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- Sharks - a Truth Balancing Method
1, 2, 3, 4by David P Bird » Sun Apr 01, 2012 11:37 am - 56 Replies
- 8395 Views
- Last post by David P Bird
Fri Jul 27, 2012 10:29 am
- Sharks - a Truth Balancing Method
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- Templates with UAs (UnAvoidable Sets)
by ronk » Tue Jul 10, 2012 6:45 pm - 12 Replies
- 1812 Views
- Last post by daj95376
Fri Jul 13, 2012 3:27 pm
- Templates with UAs (UnAvoidable Sets)
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- Reverse BUG-lite
1, 2by RW » Mon Oct 16, 2006 11:15 am - 15 Replies
- 9463 Views
- Last post by RW
Mon Jun 11, 2012 8:19 pm
- Reverse BUG-lite
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- Small patterns
by Red Ed » Sun May 20, 2012 11:27 am - 9 Replies
- 1716 Views
- Last post by Red Ed
Mon May 21, 2012 6:48 pm
- Small patterns
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- The famility of Chain Strategies/Techniques
by dino_hsu_1019 » Thu May 03, 2012 3:36 am - 2 Replies
- 2698 Views
- Last post by hobiwan
Sat May 05, 2012 12:18 pm
- The famility of Chain Strategies/Techniques
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- 0-rank logic sets in the hardest puzzles
1, 2by ronk » Tue Apr 03, 2012 1:56 pm - 21 Replies
- 4341 Views
- Last post by David P Bird
Fri May 04, 2012 11:00 pm
- 0-rank logic sets in the hardest puzzles
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- What is this technique called?
by ShadowVegan » Fri Apr 13, 2012 7:03 am
- 1 Replies
- 1454 Views
- Last post by JasonLion
Fri Apr 13, 2012 12:59 pm
- What is this technique called?
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- Forming MUGs from BUG-Lite composites
1, 2, 3, 4, 5by Myth Jellies » Tue Feb 14, 2006 12:15 pm - 64 Replies
- 24169 Views
- Last post by Luke
Sat Mar 17, 2012 4:47 pm
- Forming MUGs from BUG-Lite composites
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- Sashimi X-Wing
by cwbybri » Sat Oct 08, 2011 1:43 am - 2 Replies
- 4286 Views
- Last post by StrmCkr
Fri Nov 11, 2011 11:52 am
- Sashimi X-Wing
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- Solving using units/jouses
by pjb » Tue Oct 18, 2011 4:52 am - 0 Replies
- 1500 Views
- Last post by pjb
Tue Oct 18, 2011 4:52 am
- Solving using units/jouses
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- A new logic-based method for cracking any puzzle
by pjb » Fri Sep 23, 2011 12:33 am - 7 Replies
- 2931 Views
- Last post by tarek
Sun Sep 25, 2011 5:58 am
- A new logic-based method for cracking any puzzle
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