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- Grids with minimal UA18s for all 2-row,2-col,2-digit UA sets
1, 2by blue » Sun Jun 30, 2019 1:39 pm - 20 Replies
- 7420 Views
- Last post by m_b_metcalf
Sun Mar 10, 2024 11:04 am
- Grids with minimal UA18s for all 2-row,2-col,2-digit UA sets
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- Asking for 17-clue puzzles and 16-clues with 2 solutions
by qiuyanzhe » Tue Mar 05, 2024 5:39 am - 5 Replies
- 855 Views
- Last post by m_b_metcalf
Tue Mar 05, 2024 3:23 pm
- Asking for 17-clue puzzles and 16-clues with 2 solutions
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- Sudoku Country Order
by HATMAN » Wed Feb 21, 2024 4:22 am - 0 Replies
- 613 Views
- Last post by HATMAN
Wed Feb 21, 2024 4:22 am
- Sudoku Country Order
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- Bands and low-clue pencilmark puzzles
by dobrichev » Thu Feb 15, 2024 7:53 pm - 0 Replies
- 841 Views
- Last post by dobrichev
Thu Feb 15, 2024 7:53 pm
- Bands and low-clue pencilmark puzzles
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- Hard 5*5 Latin Squares
by qiuyanzhe » Wed Sep 19, 2018 4:22 pm - 9 Replies
- 2895 Views
- Last post by denis_berthier
Fri Feb 02, 2024 12:04 pm
- Hard 5*5 Latin Squares
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- Sandwich Sudoku Number Combinations
by Fortesque92 » Fri Jan 26, 2024 3:31 am - 2 Replies
- 2060 Views
- Last post by Fortesque92
Sat Jan 27, 2024 12:27 am
- Sandwich Sudoku Number Combinations
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- Back on Forum
by RichardGoodrich » Thu Jan 11, 2024 11:49 pm - 2 Replies
- 900 Views
- Last post by RichardGoodrich
Wed Jan 24, 2024 9:29 pm
- Back on Forum
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- Largest 2-solution BUG
by jovi_al01 » Tue Feb 01, 2022 5:15 am - 10 Replies
- 1750 Views
- Last post by Hajime
Sat Jan 20, 2024 9:00 am
- Largest 2-solution BUG
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- Best Sudoku app for iPad
by BamaFan » Wed Aug 30, 2023 1:51 pm - 1 Replies
- 1433 Views
- Last post by gulshan212
Tue Nov 14, 2023 1:58 pm
- Best Sudoku app for iPad
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- Kids reaction to sudoku
by sudokumaster » Wed Oct 25, 2023 10:46 pm - 0 Replies
- 817 Views
- Last post by sudokumaster
Wed Oct 25, 2023 10:46 pm
- Kids reaction to sudoku
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- at least three 21 clue puzzles for this pattern
by urhegyi » Tue Oct 17, 2023 9:49 am - 6 Replies
- 906 Views
- Last post by JPF
Wed Oct 18, 2023 10:15 am
- at least three 21 clue puzzles for this pattern
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- from pattern to puzzle
by P.O. » Sat Oct 07, 2023 10:41 am - 4 Replies
- 1107 Views
- Last post by P.O.
Tue Oct 10, 2023 6:45 pm
- from pattern to puzzle
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- The making of a gotchi, a simple way to find extreme sudokus
1, 2by eleven » Thu Jan 06, 2011 7:55 pm - 24 Replies
- 8030 Views
- Last post by denis_berthier
Fri Oct 06, 2023 5:43 pm
- The making of a gotchi, a simple way to find extreme sudokus
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- Sudokus on Interval [0,1]
by qiuyanzhe » Thu Sep 28, 2023 3:06 am - 1 Replies
- 951 Views
- Last post by mith
Wed Oct 04, 2023 11:48 pm
- Sudokus on Interval [0,1]
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- reddit sudoku wiki
by StrmCkr » Mon Oct 02, 2023 6:16 pm - 2 Replies
- 2186 Views
- Last post by StrmCkr
Mon Oct 02, 2023 10:16 pm
- reddit sudoku wiki
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- Hidden Candidates for Dummies
by Trocksmore » Sun Jun 04, 2023 4:14 pm - 4 Replies
- 1205 Views
- Last post by StrmCkr
Mon Oct 02, 2023 6:03 pm
- Hidden Candidates for Dummies
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- 17 digit puzzles
by warrentrammell » Fri Oct 21, 2022 6:04 pm - 11 Replies
- 1849 Views
- Last post by Yogi
Sun Oct 01, 2023 10:12 am
- 17 digit puzzles
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- at least 2 puzzles
by urhegyi » Wed Sep 27, 2023 9:54 am - 7 Replies
- 1073 Views
- Last post by JPF
Sat Sep 30, 2023 4:37 pm
- at least 2 puzzles
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- What's lowest ER for the T&E2 puzzles?
by yzfwsf » Sun Sep 24, 2023 11:10 am - 1 Replies
- 896 Views
- Last post by P.O.
Sun Sep 24, 2023 11:40 am
- What's lowest ER for the T&E2 puzzles?
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- SudoRules
by Yogi » Thu Sep 07, 2023 10:36 am - 3 Replies
- 884 Views
- Last post by denis_berthier
Sat Sep 16, 2023 2:47 am
- SudoRules
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- PIPs (Pseudo-Independent Positions)
by JP_BENTZ » Sat Sep 02, 2023 12:37 pm - 10 Replies
- 1175 Views
- Last post by JP_BENTZ
Fri Sep 08, 2023 11:49 am
- PIPs (Pseudo-Independent Positions)
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- remove one clue
by urhegyi » Thu Aug 24, 2023 6:02 pm - 2 Replies
- 797 Views
- Last post by m_b_metcalf
Fri Aug 25, 2023 9:52 am
- remove one clue
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- from MSP to SSP
by P.O. » Thu Aug 24, 2023 5:34 pm - 0 Replies
- 916 Views
- Last post by P.O.
Thu Aug 24, 2023 5:34 pm
- from MSP to SSP
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- What is rule behind it
by kurbads » Thu Aug 10, 2023 12:29 pm - 6 Replies
- 1471 Views
- Last post by StrmCkr
Fri Aug 11, 2023 10:02 pm
- What is rule behind it
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- M-wings & m-rings: exemplars & examples
1, 2by ronk » Tue May 25, 2010 9:38 pm - 26 Replies
- 9792 Views
- Last post by StrmCkr
Tue Aug 01, 2023 4:52 pm
- M-wings & m-rings: exemplars & examples
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- Sudoku "scores" & complexity
by senecan » Mon Jul 03, 2023 11:33 am - 1 Replies
- 877 Views
- Last post by denis_berthier
Wed Jul 19, 2023 6:25 am
- Sudoku "scores" & complexity
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- Some help for a newbie with a simple game code?
by rusllrd » Wed Apr 05, 2023 10:03 am - 2 Replies
- 945 Views
- Last post by gulshan212
Tue Jul 18, 2023 2:13 pm
- Some help for a newbie with a simple game code?
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- Maximal invalid patterns with the fewest number of clues.
1, 2by JPF » Fri Jun 23, 2023 8:40 pm - 19 Replies
- 1981 Views
- Last post by JPF
Sat Jul 08, 2023 9:58 pm
- Maximal invalid patterns with the fewest number of clues.
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- Minimal patterns
1, 2by Serg » Fri Oct 10, 2014 7:14 am - 15 Replies
- 3187 Views
- Last post by Serg
Sat Jul 08, 2023 3:33 pm
- Minimal patterns
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- What am I not seeing???
by groston » Thu Jun 29, 2023 9:11 pm - 2 Replies
- 754 Views
- Last post by groston
Fri Jun 30, 2023 4:07 am
- What am I not seeing???
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- Impossible situations?
by Maq777 » Wed Jun 07, 2023 1:28 am - 9 Replies
- 1130 Views
- Last post by Maq777
Sun Jun 25, 2023 1:30 pm
- Impossible situations?
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- how many components?
by P.O. » Fri May 19, 2023 6:21 pm - 7 Replies
- 1031 Views
- Last post by sudokuvalleyvenusrye
Fri Jun 23, 2023 9:28 pm
- how many components?
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- Killer Sudoku - am I missing something?
by groston » Sun Jun 18, 2023 4:28 pm - 2 Replies
- 795 Views
- Last post by groston
Sun Jun 18, 2023 7:56 pm
- Killer Sudoku - am I missing something?
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- Unique Sudokus (Russell & Jarvis)
1, 2, 3by Mathimagics » Wed Jan 10, 2018 10:42 pm - 35 Replies
- 7196 Views
- Last post by Sojourner9
Fri Jun 16, 2023 6:13 pm
- Unique Sudokus (Russell & Jarvis)
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- XYZ wing notation
by Hajime » Wed Jun 14, 2023 11:55 am - 1 Replies
- 701 Views
- Last post by Leren
Wed Jun 14, 2023 8:45 pm
- XYZ wing notation
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