Sudoku: the puzzle
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General
Everything about Sudoku that doesn't fit in one of the other sections - 1363 Topics
- 23989 Posts
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Last postEnd in n digit pattern
by champagne
Fri Mar 13, 2026 7:01 pm
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General
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Puzzles
Post puzzles for others to solve here. - 5618 Topics
- 39954 Posts
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Last postHajime's 4 Rings
by m_b_metcalf
Mon Mar 16, 2026 8:54 am
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Puzzles
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Help with puzzles and solving techniques
Post the puzzle or solving technique that's causing you trouble and someone will help - 1562 Topics
- 12462 Posts
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Last postfinned x-wing strangeness
by denis_berthier
Fri Mar 13, 2026 12:35 pm
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Help with puzzles and solving techniques
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Advanced solving techniques
Advanced methods and approaches for solving Sudoku puzzles - 1381 Topics
- 21057 Posts
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Last postXYZ-Ring
by rjamil
Wed Feb 18, 2026 2:09 am
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Advanced solving techniques
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Interactive games
Interactive on-site game threads go here - 22 Topics
- 60678 Posts
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Last postPatterns Game ...
by Hajime
Mon Mar 03, 2025 6:14 pm
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Interactive games
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Software
Programs which generate, solve, and analyze Sudoku puzzles - 760 Topics
- 6901 Posts
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Last postBitwise/Boolean ...
by rjamil
Tue Mar 10, 2026 2:21 am
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Software
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- Puzzle collections sorted by solving qualities
by tso » Thu Aug 03, 2006 5:38 pm - 14 Replies
- 27818 Views
- Last post by denis_berthier
Fri Sep 08, 2023 4:39 am
- Puzzle collections sorted by solving qualities
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- List of Acronyms
by Wecoc » Tue Jan 21, 2020 11:18 pm - 10 Replies
- 14200 Views
- Last post by denis_berthier
Fri Mar 04, 2022 7:24 am
- List of Acronyms
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- Places to go for solving tips
by Ruud » Sun Jan 20, 2008 10:31 pm - 8 Replies
- 22168 Views
- Last post by mac_sudo
Sun Jun 21, 2020 11:43 pm
- Places to go for solving tips
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- Sudokus of Shame
1 ... 4, 5, 6
by Moschopulus » Thu Feb 02, 2006 1:19 am
- 86 Replies
- 130186 Views
- Last post by enxio27
Tue Dec 11, 2018 2:53 pm
- Sudokus of Shame
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- What this forum is for
by JasonLion-Admin » Thu May 27, 2010 1:29 pm - 0 Replies
- 11782 Views
- Last post by JasonLion-Admin
Thu May 27, 2010 1:29 pm
- What this forum is for
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- Interactive games forum decorum
by g.r.emlin » Sat May 22, 2010 5:31 am - 0 Replies
- 10995 Views
- Last post by g.r.emlin
Sat May 22, 2010 5:31 am
- Interactive games forum decorum
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- New topics - How to ask for help
by Animator » Wed Dec 28, 2005 12:58 am - 0 Replies
- 16814 Views
- Last post by Animator
Wed Dec 28, 2005 12:58 am
- New topics - How to ask for help
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- Hajime's 4 Rings
by m_b_metcalf » Thu Mar 12, 2026 3:51 pm - 5 Replies
- 130 Views
- Last post by m_b_metcalf
Mon Mar 16, 2026 8:54 am
- Hajime's 4 Rings
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- Symmetrical SE=8.3
by Hajime » Sun Mar 15, 2026 11:25 am - 2 Replies
- 53 Views
- Last post by rjamil
Mon Mar 16, 2026 1:54 am
- Symmetrical SE=8.3
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- End in n digit pattern
by champagne » Fri Mar 06, 2026 7:57 am - 6 Replies
- 164 Views
- Last post by champagne
Fri Mar 13, 2026 7:01 pm
- End in n digit pattern
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- finned x-wing strangeness
by speter » Thu Mar 12, 2026 1:08 am - 3 Replies
- 74 Views
- Last post by denis_berthier
Fri Mar 13, 2026 12:35 pm
- finned x-wing strangeness
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- Steve Hodoku 3-10-2026
by SteveG48 » Tue Mar 10, 2026 4:58 pm - 5 Replies
- 89 Views
- Last post by pjb
Thu Mar 12, 2026 2:07 am
- Steve Hodoku 3-10-2026
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- Bitwise/Boolean Sudoku Solver
1, 2 by rjamil » Fri Aug 07, 2015 7:51 pm
- 22 Replies
- 9593 Views
- Last post by rjamil
Tue Mar 10, 2026 2:21 am
- Bitwise/Boolean Sudoku Solver
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- Help to bring down this SE = 10.6 puzzle
by jco » Wed Feb 25, 2026 11:08 pm - 4 Replies
- 170 Views
- Last post by jco
Mon Mar 09, 2026 12:07 am
- Help to bring down this SE = 10.6 puzzle
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- Steve Hodoku 3-7-2026
by SteveG48 » Sat Mar 07, 2026 8:42 pm - 4 Replies
- 79 Views
- Last post by Cenoman
Sun Mar 08, 2026 11:02 pm
- Steve Hodoku 3-7-2026
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- The BxB classification of T&E(2) puzzles
1 ... 26, 27, 28by denis_berthier » Thu Sep 07, 2023 12:10 pm - 408 Replies
- 72810 Views
- Last post by hendrik_monard
Wed Mar 04, 2026 9:22 pm
- The BxB classification of T&E(2) puzzles
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- challenging puzzle 2602_2
by champagne » Fri Feb 13, 2026 6:39 am - 11 Replies
- 337 Views
- Last post by champagne
Tue Mar 03, 2026 4:55 pm
- challenging puzzle 2602_2
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- T&E(3) Puzzles (split from "hardest sudokus" thread)
1 ... 8, 9, 10by mith » Mon Nov 07, 2022 7:24 pm - 148 Replies
- 34402 Views
- Last post by denis_berthier
Tue Mar 03, 2026 11:26 am
- T&E(3) Puzzles (split from "hardest sudokus" thread)
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- Symmetrical SE=7.1
by Hajime » Mon Mar 02, 2026 9:12 am - 3 Replies
- 89 Views
- Last post by Hajime
Tue Mar 03, 2026 9:20 am
- Symmetrical SE=7.1
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- Steve Stumble 2-26-2026
by SteveG48 » Thu Feb 26, 2026 2:11 pm - 4 Replies
- 85 Views
- Last post by Cenoman
Sat Feb 28, 2026 3:50 pm
- Steve Stumble 2-26-2026
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- Steve Stumble 2-20-2026
by SteveG48 » Fri Feb 20, 2026 6:32 pm - 6 Replies
- 133 Views
- Last post by rjamil
Wed Feb 25, 2026 2:08 am
- Steve Stumble 2-20-2026
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- uniqueness test 3 (my logic is wrong) :(
by speter » Sun Feb 22, 2026 12:59 am - 3 Replies
- 92 Views
- Last post by speter
Sun Feb 22, 2026 9:22 pm
- uniqueness test 3 (my logic is wrong) :(
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- (1+BRT) expansion paths within T&E(n) and beyond
1 ... 6, 7, 8by denis_berthier » Sun Apr 06, 2025 5:37 am - 106 Replies
- 47148 Views
- Last post by denis_berthier
Thu Feb 19, 2026 8:19 am
- (1+BRT) expansion paths within T&E(n) and beyond
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- Leader Board issue with sudoku.org Extreme level
by beachcomber6 » Tue Jan 13, 2026 10:33 am - 1 Replies
- 1035 Views
- Last post by janpuls
Wed Feb 18, 2026 11:22 am
- Leader Board issue with sudoku.org Extreme level
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- WE#6364 (SE 7.2)
by Cenoman » Mon Feb 09, 2026 4:18 pm - 2 Replies
- 128 Views
- Last post by Cenoman
Sun Feb 15, 2026 9:29 pm
- WE#6364 (SE 7.2)
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- Valentine 2026 SE=8.8/8.8/8.8
by Hajime » Sat Feb 14, 2026 8:49 pm - 1 Replies
- 72 Views
- Last post by Cenoman
Sun Feb 15, 2026 8:10 pm
- Valentine 2026 SE=8.8/8.8/8.8
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- Steve Stumble 2-13-2026
by SteveG48 » Fri Feb 13, 2026 5:04 pm - 2 Replies
- 77 Views
- Last post by Cenoman
Sat Feb 14, 2026 10:39 pm
- Steve Stumble 2-13-2026
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- challenging puzzle 2602_1
by champagne » Fri Feb 13, 2026 6:02 am - 1 Replies
- 70 Views
- Last post by ghfick
Sat Feb 14, 2026 6:57 pm
- challenging puzzle 2602_1
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- Valentine 2026 (SE=7.6/7.6/7.6)
by Hajime » Fri Feb 13, 2026 10:00 am - 1 Replies
- 264 Views
- Last post by eleven
Fri Feb 13, 2026 8:50 pm
- Valentine 2026 (SE=7.6/7.6/7.6)
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- challenging puzzle 2602_3
by champagne » Fri Feb 13, 2026 7:47 am - 1 Replies
- 73 Views
- Last post by champagne
Fri Feb 13, 2026 1:38 pm
- challenging puzzle 2602_3
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- Valentine 2026 (SE=7.1/7.1/7.1)
by Hajime » Wed Feb 11, 2026 2:13 pm - 7 Replies
- 135 Views
- Last post by Hajime
Fri Feb 13, 2026 9:36 am
- Valentine 2026 (SE=7.1/7.1/7.1)
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- Valentine 2026 (SE=6.6/6.6/6.6)
by Hajime » Thu Feb 12, 2026 2:53 pm - 3 Replies
- 76 Views
- Last post by rjamil
Thu Feb 12, 2026 10:57 pm
- Valentine 2026 (SE=6.6/6.6/6.6)
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- Valentine 2026 (SE=7.6)
by Hajime » Tue Feb 10, 2026 3:51 pm - 2 Replies
- 99 Views
- Last post by eleven
Thu Feb 12, 2026 5:58 pm
- Valentine 2026 (SE=7.6)
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- valentine (7.2/7.2/7.1) based on the layout by Hajime
by urhegyi » Wed Feb 11, 2026 6:17 pm - 2 Replies
- 98 Views
- Last post by Cenoman
Thu Feb 12, 2026 10:43 am
- valentine (7.2/7.2/7.1) based on the layout by Hajime
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