Show HN: Countle (opens in new tab)

100 + 75 + 8 + 6 - 50 / 25 = 187

Any better solutions?

The Countdown numbers round included this impressive solution in the allotted 30 seconds.

https://www.google.com/url?sa=t&source=web&rct=j&url=https:/...

As always that means there is a solver.

https://www.maths-resources.com/countdown/

Nifty. Could use some explanation, as not everyone is familiar with the show Countdown (particularly outside the UK).

Even knowing the show, I was a bit confused how I was supposed to solve it using only one operation, until I realized it was a series of steps. And it took me a moment to figure out how to reuse the result of a previous step.

Once I had figured that all out, though, it was a pleasure to use. Well done!

I would like to be able to undo any part of a calculation without trashing the whole row.

Nice. I too enjoy making these little puzzles. Check out one I did last month:

https://curdle.me

Oof, took me 30 minutes

I made summle.net a while back, which is similar.

After I while I found that this type of game can be frustrating as you are not incrementally solving the puzzle - instead there are multiple dead ends before stumbling upon the solution.

Have been playing https://numble.wtf for a while, which is the same thing but nicer UI

When adding to Home Screen on phone, title suggest is ‘React App’. I changed it to ‘Countle’.

Great game, thanks!

The symbol for the multiplication shows as "ă" for me for some reason.

Named for the TV show?

https://en.wikipedia.org/wiki/Countdown_(game_show)

No nerdle fans here?

https://nerdlegame.com/

I was surprised you didn't have to use all of the numbers at the top. I never used the 8.

Nice, as always with these things, the fun for me is writing a little solver:

https://gist.github.com/Q726kbXuN/393e7840cc5a0d20ef2bff7098...

Nice implementation and animations.

I've used summle.net for a couple of months.

Few ideas from their implementation: - achievements, badges and stats - hints when your stuck - 3 levels (for kids, normal, extreme) - quick erase all - % of overall resolution from other user - best solution (in N moves VS your K moves)

Few other ideas: - dark mode - practice mode (more user retention, just like quordle)

Enjoy your code and your project, I'll try to add it to my daily puzzles.

Good stuff, thanks for sharing!

There's a card game Krypto that is similar, fun to play with my kids. I wrote some scripts awhile ago to solve Krypto games and figure out how many games are unsolvable.

I wrote up my thinking and how I went about solving here: https://mkaz.blog/math/krypto-game-analysis/

Very nice, particularly enjoyed the video (I did not know the original game). Could be improved on the sharing part! (Is puzzle the same for everyone?). A first idea: green squares for numbers on top used, yellow squares for intermediate numbers where used. Green square for final solution. Black (or similar) circle for operations. Black squares for other numbers

enjoyed this, thanks! I did have a problem (Firefox, Android) where hitting "share" upon completion just didn't work with some error I can't remember along the lines of not having any content to copy to clipboard. Now that the share button has disappeared I can no longer even try to share again

I once built a Tetris-like game prototype where you needed to form algebraic equations to clear objects, the more complex your equation the more points you got [1]. Reminds me a bit of this.

1: https://www.youtube.com/watch?v=Cux8jobEbEs

About time someone did a numeric version of Wordle. Nice execution

That's really cool. The UI is very intuitive. Bookmarked. :)

This is my favorite so far of the number-based wordle-likes.

Absolutely unintuitive as compare to Wordle (which I'm guessing the name is a play on).

Okay. I have zero intuition about how to solve this and that has me very intrigued.

I'm really bad at calc, it took me 6mn, but without using the 8. :)

Brilliant, thank you. That’s a new daily puzzle in my bookmarks.

This is great

Very good.

I enjoyed this. Thank you.

This is fun, thanks.