9x9 Project: Building Math Identity One Digit at a Time's Avatar

9x9 Project: Building Math Identity One Digit at a Time

@9x9.bsky.social

Project aimed at using variant sudoku as a vehicle to keep kids excited about math while fostering mathematical reasoning and communication skills. Follow for daily puzzles, project updates, and more!

63 Followers  |  39 Following  |  120 Posts  |  Joined: 07.09.2023  |  1.8858

Latest posts by 9x9.bsky.social on Bluesky

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Check out this puzzle by @fdmafc.bsky.social !

Firing Wildly - variant sudoku using Arrows and Quadruples.

πŸ”—: sudokupad.app/7i10ret7j6

09.10.2025 20:57 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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Check out this puzzle by @fdmafc.bsky.social !

Unknown Doubles - variant sudoku using X-Sums and Ratio dots.

πŸ”—: sudokupad.app/39noaaesuy

08.10.2025 16:53 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Check out this puzzle by @fdmafc.bsky.social !

Flag - variant sudoku using whisper-5.

πŸ”—: sudokupad.app/yw6ll0pr8v

30.09.2025 22:04 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0
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Check out this puzzle by @fdmafc.bsky.social !

Input Output - variant sudoku using XV pairs and palindromes.

πŸ”—: sudokupad.app/xxgjlxv33o

24.09.2025 16:31 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Dot's Crazy! - variant sudoku using kropki pairs.

πŸ”—: sudokupad.app/n6hva2svjo

23.09.2025 01:32 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Ratiarrows - variant sudoku using arrows and ratio dots.

πŸ”—: sudokupad.app/dft05ey02d

17.09.2025 02:55 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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Romans In and Out of Cages - variant sudoku using XV pairs and cages.

πŸ”—: sudokupad.app/fw9mrlhldu

15.09.2025 17:38 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Speed Bumps - variant sudoku using X-sums and quadruples.

πŸ”—: sudokupad.app/f6fvrnvkar

12.09.2025 18:20 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Five to Twelve - variant sudoku using XV pairs and cages.

πŸ”—: sudokupad.app/d93d20aq05

11.09.2025 15:49 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Marked Trail - variant sudoku using XV pairs and arrows.

πŸ”—: sudokupad.app/r0jvreajqj

09.09.2025 17:36 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Check out this puzzle by @fdmafc.bsky.social !

Pretzel - variant sudoku using XV pairs.

πŸ”—: sudokupad.app/x14c8k53m7

08.09.2025 15:46 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Variant sudoku using cages and renban lines.

πŸ”—: sudokupad.app/2rk0x52x35

05.09.2025 17:00 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Check out this puzzle from @fdmafc.bsky.social !

Countdown 10, 9, 8 ...: variant sudoku using cages and thermometers.

πŸ”—: sudokupad.app/2d6c6zf430

24.07.2025 13:05 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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A Smattering of Dots - variant sudoku using Kropki pairs.

πŸ”—: sudokupad.app/9xw1os15hl

30.06.2025 13:57 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Up In The Air - variant sudoku using German whispers and Kropki pairs.

πŸ”—: sudokupad.app/6p5hor0fln

27.06.2025 17:54 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Juneteenth - variant sudoku using Dutch Whispers and Ratio dots.

πŸ”—: sudokupad.app/qwljt8mdxq

19.06.2025 15:15 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Breastplate - variant sudoku using thermometers and consecutive pairs.

πŸ”—: sudokupad.app/zv113l0vtl

08.06.2025 15:01 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Check out this puzzle by @fdmafc.bsky.social !

Ring Around the Rosie - variant sudoku using arrows and quadruples.

πŸ”—: sudokupad.app/41k6re8o1q

06.06.2025 23:28 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Completely Not Celtic - variant sudoku using cages.

πŸ”—: sudokupad.app/faorvb2su7

07.04.2025 18:34 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Our very own @fdmafc.bsky.social are presenting now! Join the livestream to watch β€˜Snackdoku Setting Party’!

#SudokuCon #9x9

06.04.2025 15:26 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Having a great time at SudokuCon 2025!

@fdmafc.bsky.social #SudokuCon #9x9

05.04.2025 22:56 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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The last digit has been placed in the β€œ1 Sudoku 81 Solvers” challenge with Gliperal!

#SudokuCon #9x9 #Sudoku

05.04.2025 18:47 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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9x9 Project partner, @zetamath.bsky.social , presenting on the Mathematics of Pencil Puzzles now at #SudokuCon !

05.04.2025 16:37 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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@sudokucon.bsky.social day 2 is on now with @rangsk.bsky.social , @sirxemic.com , and @killroy.bsky.social !

#SudokuCon #9x9

05.04.2025 14:33 β€” πŸ‘ 3    πŸ” 1    πŸ’¬ 0    πŸ“Œ 1
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Check out this puzzle by @fdmafc.bsky.social that was featured at #SudokuCon yesterday !

Dotty Days - variant sudoku using Kropki pairs.

πŸ”—: sudokupad.app/sd5euspppa

05.04.2025 13:11 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Glum Hippo is presenting on β€˜Creating Your Own Sudoku Variant Workshop’ now!

Tune into the #SudokuCon livestream here: sudokucon.com/livestream-t...

04.04.2025 14:12 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Preview
SudokuCon Official website for SudokuCon

The First SudokuCon is here!! We are excited to host everyone in Boston, MA and are looking forward to the next three days of puzzling fun! Tickets are still available for access to SudokuCon livestream. Information is here: sudokucon.com

04.04.2025 02:52 β€” πŸ‘ 3    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0
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SudokuCon starts now!!

@sudokucon.bsky.social

04.04.2025 14:06 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 0    πŸ“Œ 1
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Check out this puzzle by @fdmafc.bsky.social !

Double Dealing - variant sudoku using X-sums and cages.

πŸ”—: sudokupad.app/8h7sbscdds

03.04.2025 15:34 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Sudoku U Journals : Peace Frog
YouTube video by BremSter Puzzles Sudoku U Journals : Peace Frog

@bremster.bsky.social solves one of the 9x9 Project’s student puzzles in this new edition of Sudoku U!

Peace Frog by La Lune- variant sudoku using German Whispers, Row Indexing, Quadruples, Entropic Lines and Ratio Pairs.

videoπŸ”—: youtu.be/BjkwBxqMOsA?...

puzzleπŸ”—: sudokupad.app/kf90fgjxqr

20.02.2025 14:57 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

@9x9 is following 20 prominent accounts