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r/greyisodd

🧩 Daily Challenge! Level 4 #2456 – Test your parity logic! 🧠
▲ 3 r/greyisodd+1 crossposts

🧩 Daily Challenge! Level 4 #2456 – Test your parity logic! 🧠

🕹️ CLICK HERE TO PLAY: https://www.greyisodd.com/?size=7x7&level=liv4&id=2456&utm_source=reddit&utm_medium=social&utm_campaign=daily_puzzle

Here is today's 7x7 Level 4 grid for your daily logic session.

Work through the parity constraints across the grey and white regions, systematically match the row and column targets, and clear the grid step by step using pure deduction.

Feel free to post your completion time, restarts, and undos in the comments below!

📖 QUICK RULES:

  • Numbers: Total dots in that row or column.
  • White Areas: Must have an EVEN number of dots (0, 2, 4...).
  • Grey Areas: Must have an ODD number of dots (1, 3, 5...).

Join the Community!

Hit the "Join" button to stay updated with daily logic challenges.

— Giovanni

u/playgreyisodd — 15 hours ago
▲ 2 r/greyisodd+1 crossposts

🧩 Daily Challenge! Level 4 #43067 – Test your parity logic! 🧠

🕹️ CLICK HERE TO PLAY: https://www.greyisodd.com/?size=7x7&level=liv4&id=43067&utm_source=reddit&utm_medium=social&utm_campaign=daily_puzzle

Here is today's 7x7 Level 4 grid for your daily logic session.

Work through the parity constraints across the grey and white regions, systematically match the row and column targets, and clear the grid step by step using pure deduction.

Feel free to post your completion time, restarts, and undos in the comments below!

📖 QUICK RULES:

  • Numbers: Total dots in that row or column.
  • White Areas: Must have an EVEN number of dots (0, 2, 4...).
  • Grey Areas: Must have an ODD number of dots (1, 3, 5...).

Join the Community!

Hit the "Join" button to stay updated with daily logic challenges.

— Giovanni

u/playgreyisodd — 1 day ago
▲ 4 r/greyisodd+1 crossposts

Daily Challenge! Level 4 #22710 – Test your parity logic! 🧠

🕹️ CLICK HERE TO PLAY: https://www.greyisodd.com/?size=7x7&level=liv4&id=22710&utm_source=reddit&utm_medium=social&utm_campaign=daily_puzzle

Here is today's 7x7 Level 4 grid for your daily logic session.

Work through the parity constraints across the grey and white regions, systematically match the row and column targets, and clear the grid step by step using pure deduction.

Feel free to post your completion time, restarts, and undos in the comments below!

📖 QUICK RULES:

  • Numbers: Total dots in that row or column.
  • White Areas: Must have an EVEN number of dots (0, 2, 4...).
  • Grey Areas: Must have an ODD number of dots (1, 3, 5...).

Join the Community!

Hit the "Join" button to stay updated with daily logic challenges.

— Giovanni

u/playgreyisodd — 3 days ago
▲ 3 r/greyisodd+1 crossposts

Daily Challenge! Level 4 #5937 – Test your parity logic! 🧠

🕹️ CLICK HERE TO PLAY: https://www.greyisodd.com/?size=7x7&level=liv4&id=5937&utm_source=reddit&utm_medium=social&utm_campaign=daily_puzzle

Here is today's 7x7 Level 4 grid for your daily logic session.

Work through the parity constraints across the grey and white regions, systematically match the row and column targets, and clear the grid step by step using pure deduction.

Feel free to post your completion time, restarts, and undos in the comments below!

📖 QUICK RULES:

  • Numbers: Total dots in that row or column.
  • White Areas: Must have an EVEN number of dots (0, 2, 4...).
  • Grey Areas: Must have an ODD number of dots (1, 3, 5...).

Join the Community!

Hit the "Join" button to stay updated with daily logic challenges.

— Giovanni

u/playgreyisodd — 4 days ago
▲ 3 r/greyisodd+1 crossposts

🧩 Daily Challenge! Level 4 #9509 – Test your parity logic! 🧠

🕹️ CLICK HERE TO PLAY: https://www.greyisodd.com/?size=7x7&level=liv4&id=9509&utm_source=reddit&utm_medium=social&utm_campaign=daily_puzzle

Here is today's 7x7 Level 4 grid for your daily logic session.

Work through the parity constraints across the grey and white regions, systematically match the row and column targets, and clear the grid step by step using pure deduction.

Feel free to post your completion time, restarts, and undos in the comments below!

📖 QUICK RULES:

  • Numbers: Total dots in that row or column.
  • White Areas: Must have an EVEN number of dots (0, 2, 4...).
  • Grey Areas: Must have an ODD number of dots (1, 3, 5...).

Join the Community!

Hit the "Join" button to stay updated with daily logic challenges.

— Giovanni

u/playgreyisodd — 5 days ago
▲ 4 r/greyisodd

Feedback: Should we add "Pencil Marks" / Candidate Notes to Grey is Odd? ✏️🧩

Hi everyone! 👋

First of all, thank you all so much for the engagement, strategy sharing, and daily completion times. The community support lately has been amazing!

Recently, a few players (shoutout to u/eleesia33 and u/pattybutty) brought up a feature request: adding pencil marks, candidate notes, or color-coding to mark hypotheticals or possible dot placements on cells.

Before deciding anything, I wanted to share my perspective as the creator — along with a personal story — and open the floor to hear what you all think!

A Personal Story from Paper Sudoku 📝

To be completely transparent, my hesitation comes from my own experience playing Sudoku on paper (and full disclosure: I’m far from an expert at it!).

Whenever I get stuck on paper, I often get tempted to try my luck and jot down candidate numbers to test scenarios. But almost every single time I do that, I pay a heavy price: tedious erasing, messy corrections over corrections, and a completely ruined grid!

That physical friction and the annoyance of erasing actually serves a purpose: it forces me to stop guessing and hunt for the true, elegant logical deduction instead.

The Digital Dilemma & The "Undo" Feature 🧠

On paper, guessing costs effort and leaves a mess. In a digital interface, testing paths is much easier.

In fact, we already have the Undo button, which provides a safety net for light exploration — if you test a move and hit a contradiction, you can easily backtrack with a single click.

My main worry with adding dedicated candidate notes on top of this is:

Trial & Error vs. Pure Deduction: Making scenario-testing too effortless risks shifting the experience from pure parity logic into rapid guessing.

Keeping the Grid Clean: Part of the game's identity is a minimalist, uncluttered board where you rely on mental deduction.

What do you think? 🤔

Do you prefer keeping the grid clean, relying entirely on pure mental logic and parity rules?

Does the current Undo button offer enough of a safety net, or would candidate notes truly enhance your experience?

If we ever considered a note system, is there a way to do it without encouraging trial-and-error?

Drop your thoughts in the comments below — I’m really curious to read everyone’s perspective!

— Giovanni

reddit.com
u/playgreyisodd — 5 days ago
▲ 4 r/greyisodd+1 crossposts

🧩 Daily Challenge! Level 4 #41579 – Test your parity logic! 🧠

🕹️ CLICK HERE TO PLAY: https://www.greyisodd.com/?size=7x7&level=liv4&id=41579&utm_source=reddit&utm_medium=social&utm_campaign=daily_puzzle

Here is today's 7x7 Level 4 grid for your daily logic session.

Work through the parity constraints across the grey and white regions, systematically match the row and column targets, and clear the grid step by step using pure deduction.

Feel free to post your completion time, restarts, and undos in the comments below!

📖 QUICK RULES:

  • Numbers: Total dots in that row or column.
  • White Areas: Must have an EVEN number of dots (0, 2, 4...).
  • Grey Areas: Must have an ODD number of dots (1, 3, 5...).

Join the Community!

Hit the "Join" button to stay updated with daily logic challenges.

— Giovanni

3. Il Commento per il C

u/playgreyisodd — 6 days ago
▲ 4 r/greyisodd+1 crossposts

Daily Challenge! Level 4 #35164 (Tricky one today! ⚠️) – Test your parity logic! 🧠

🕹️ CLICK HERE TO PLAY: https://www.greyisodd.com/?size=7x7&level=liv4&id=35164&utm_source=reddit&utm_medium=social&utm_campaign=daily_puzzle

Here is today's 7x7 Level 4 grid for your daily logic session.

Fair warning: Today’s grid (#35164) is particularly tricky! It has a few subtle parity traps that can easily catch you off guard if you rush, so take your time and watch out for those hidden logical steps.

Work through the region constraints, systematically match the row and column targets, and clear the grid step by step using pure deduction.

Feel free to post your completion time, restarts, and undos in the comments below — let me know if this one gave you a hard time!

📖 QUICK RULES:

  • Numbers: Total dots in that row or column.
  • White Areas: Must have an EVEN number of dots (0, 2, 4...).
  • Grey Areas: Must have an ODD number of dots (1, 3, 5...).

Join the Community!

Hit the "Join" button to stay updated with daily logic challenges.

— Giovanni

u/playgreyisodd — 7 days ago
▲ 4 r/greyisodd+1 crossposts

🧩 Daily Challenge! Level 4 #3196 – Test your parity logic! 🧠

🕹️ CLICK HERE TO PLAY: https://www.greyisodd.com/?size=7x7&level=liv4&id=3196&utm_source=reddit&utm_medium=social&utm_campaign=daily_puzzle

Here is today's 7x7 Level 4 grid for your daily logic session.

Work through the parity constraints across the grey and white regions, systematically match the row and column targets, and clear the grid step by step using pure deduction.

Feel free to post your completion time, restarts, and undos in the comments below!

📖 QUICK RULES:

  • Numbers: Total dots in that row or column.
  • White Areas: Must have an EVEN number of dots (0, 2, 4...).
  • Grey Areas: Must have an ODD number of dots (1, 3, 5...).

Join the Community!

Hit the "Join" button to stay updated with daily logic challenges.

— Giovanni

u/playgreyisodd — 8 days ago
▲ 5 r/greyisodd+1 crossposts

🧩 Daily Challenge! Level 4 #9459 – Test your parity logic! 🧠

🕹️ CLICK HERE TO PLAY: https://www.greyisodd.com/?size=7x7&level=liv4&id=9459&utm_source=reddit&utm_medium=social&utm_campaign=daily_puzzle

Here is today's 7x7 Level 4 grid for your daily logic session.

Work through the parity constraints across the grey and white regions, systematically match the row and column targets, and clear the grid step by step using pure deduction.

Feel free to post your completion time, restarts, and undos in the comments below!

📖 QUICK RULES:

  • Numbers: Total dots in that row or column.
  • White Areas: Must have an EVEN number of dots (0, 2, 4...).
  • Grey Areas: Must have an ODD number of dots (1, 3, 5...).

Join the Community!

Hit the "Join" button to stay updated with daily logic challenges.

— Giovanni

u/playgreyisodd — 9 days ago
▲ 3 r/greyisodd

Help interpreting Tips & Tricks?

I feel like I must have reached the point where I need to apply the techniques suggested on the tips & tricks page. I'm failing, though, at understanding them. For example:

I understand the meaning of "parity" in general, but I can't figure out what it refers to here. What things are equal? Step 3 under Peninsula, for example, says, "Row/column totals give the cut parity." Is that saying 5 + 1 (from bottom 2 rows) is equal to 4 + 2 (from left 2 columns)? So the peninsula cut would only be feasible in very limited circumstances? And why would it be those left 2 columns, specifically?

I also can't figure out what makes a cut ODD or EVEN: Is it the number of grey shapes versus white shapes within the cut (e.g., 5 grey shapes + 2 white shapes = ODD because 5 > 2)? What if the shapes are evenly split, say, 2 grey, 2 white? Or is ODD/EVEN cut determined based on the sums of some row and col numbers or the number of squares within the cut or something else?

There are other tips I don't follow, too, but I didn't want to list them all here. Are these all explained more thoroughly somewhere? I'm wondering whether I missed a post or page that would help me figure out what I'm missing. If that doesn't exist, that's okay. I'm sure I'll get it eventually, but I at least wanted to ask.

Thanks for the game and the help—even if it's just, "Regretfully, no," I'll at least know I need to puzzle it out for myself.

reddit.com
u/chalouky — 9 days ago
▲ 4 r/greyisodd

Peninsula question

I'm struggling a little to understand the tips, so I hope that it's ok to ask.

I have solved this one trying to use the peninsula trick. But I thought that c4r7 should be a dot, so I guess that I haven't understood the explanation very well.

Could you explain it to me in simple terms?

u/Maleficent-Poet-8174 — 8 days ago
▲ 1 r/greyisodd

Another game, another question

Edit: Solved: ⬛⬜ Grey is Odd - 7x7 LIV3 #28058
⏱️ Time: 14:15
⚔️ Battle: 14:15 | 🔄 Restarts: 0 | 🔙 Undos: 0

🎮 Play here: https://www.greyisodd.com/?size=7x7&level=liv3&id=28058&utm\_source=reddit

Where do I go from here?

Maybe it's now that I should look at the "regions" from the tips and tricks, but I don't understand how.

Screenshot in the comments - very odd that I can't add it here.

reddit.com
u/Maleficent-Poet-8174 — 8 days ago
▲ 4 r/greyisodd+1 crossposts

🧩 Daily Challenge! Level 4 #30555 – Test your parity logic! 🧠

🕹️ CLICK HERE TO PLAY: https://www.greyisodd.com/?size=7x7&level=liv4&id=30555&utm_source=reddit&utm_medium=social&utm_campaign=daily_puzzle

Here is today's 7x7 Level 4 grid for your daily logic session.

Work through the parity constraints across the grey and white regions, systematically match the row and column targets, and clear the grid step by step using pure deduction.

Feel free to post your completion time, restarts, and undos in the comments below!

📖 QUICK RULES:

  • Numbers: Total dots in that row or column.
  • White Areas: Must have an EVEN number of dots (0, 2, 4...).
  • Grey Areas: Must have an ODD number of dots (1, 3, 5...).

Join the Community!

Hit the "Join" button to stay updated with daily logic challenges.

— Giovanni

u/playgreyisodd — 10 days ago
▲ 4 r/greyisodd+1 crossposts

🧩 Daily Challenge! Level 4 #17851 – Test your parity logic! 🧠

🕹️ CLICK HERE TO PLAY: https://www.greyisodd.com/?size=7x7&level=liv4&id=17851&utm_source=reddit&utm_medium=social&utm_campaign=daily_puzzle

Here is today's 7x7 Level 4 grid for your daily logic session.

Work through the parity constraints across the grey and white regions, systematically match the row and column targets, and clear the grid step by step using pure deduction.

Feel free to post your completion time, restarts, and undos in the comments below!

📖 QUICK RULES:

  • Numbers: Total dots in that row or column.
  • White Areas: Must have an EVEN number of dots (0, 2, 4...).
  • Grey Areas: Must have an ODD number of dots (1, 3, 5...).

Join the Community!

Hit the "Join" button to stay updated with daily logic challenges.

— Giovanni

u/playgreyisodd — 11 days ago
▲ 6 r/greyisodd+1 crossposts

🧩 Daily Challenge! Level 4 #3373 – Test your parity logic! 🧠

🕹️ CLICK HERE TO PLAY: https://www.greyisodd.com/?size=7x7&level=liv4&id=3373&utm_source=reddit&utm_medium=social&utm_campaign=daily_puzzle

Here is today's 7x7 Level 4 grid for your daily logic session.

Work through the parity constraints across the grey and white regions, systematically match the row and column targets, and clear the grid step by step using pure deduction.

Feel free to post your completion time, restarts, and undos in the comments below!

📖 QUICK RULES:

  • Numbers: Total dots in that row or column.
  • White Areas: Must have an EVEN number of dots (0, 2, 4...).
  • Grey Areas: Must have an ODD number of dots (1, 3, 5...).

Join the Community!

Hit the "Join" button to stay updated with daily logic challenges.

— Giovanni

u/playgreyisodd — 12 days ago
▲ 8 r/greyisodd+1 crossposts

If you like either greyisodd or CluesbySam, you would probably like the other as well

Note: I have no connection to either game, I just enjoy them both!

On the face of it these two daily puzzle games look quite different. One is exclusively text based, the other looks like a sudoku, or even more a masyu. But the types of challenges they pose are very similar, and scratch the same puzzling itch.

There is of course lots of "if X then Y" reasoning in each. But also lots of "assuming it's X leads to a contradiction, so it must be Y". Lots of "I don't know whether this is X or Y, but either way that must be Z". Lots of "it must be either A and B or X and Y, but whichever it is leads to the same result about Z". Both puzzles have degrees of difficulty ranging from quite straightforward to very challenging. And both are based in websites but have subreddits devoted to them, moderated by the creator of the puzzle.

If you haven't tried CLuesBySam (r/CluesBySamHelp) start on a Monday or Tuesday, and do the tutorial - puzzles later in the week are more challenging. And if you are trying r/greyisodd for the first time, don't start with the 7x7 level 4 puzzles in the subreddit, but go to the website and try some smaller and simpler ones first to get the hang of things.

Mods, I hope this post isn't seen as inappropriate, but if it is, feel free to remove it. I'm not trying to draw anyone away from either subreddit, just to encourage more people to join both!

reddit.com
u/Party_Success_2195 — 12 days ago
▲ 3 r/greyisodd+1 crossposts

🧩 Daily Challenge! Level 4 #21876 – Test your parity logic! 🧠

🕹️ CLICK HERE TO PLAY: https://www.greyisodd.com/?size=7x7&level=liv4&id=21876&utm_source=reddit&utm_medium=social&utm_campaign=daily_puzzle

Here is today's 7x7 Level 4 grid for your daily logic session.

Work through the parity constraints across the grey and white regions, systematically match the row and column targets, and clear the grid step by step using pure deduction.

Feel free to post your completion time, restarts, and undos in the comments below!

📖 QUICK RULES:

  • Numbers: Total dots in that row or column.
  • White Areas: Must have an EVEN number of dots (0, 2, 4...).
  • Grey Areas: Must have an ODD number of dots (1, 3, 5...).

Join the Community!

Hit the "Join" button to stay updated with daily logic challenges.

— Giovanni

u/playgreyisodd — 13 days ago
▲ 3 r/greyisodd

Am I missing some logic or something?

Hello! I am new to Grey is Odd. I tried solving this puzzle but I got stuck here. Is there some way to solve it or is it just 50/50 chance? I tried one of the options but it didn’t say that I solved it, even though I don’t see why it wouldn’t work. Am I missing something?

u/BekindConan — 12 days ago