Show HN: 3D Mahjong, Built in CSS

Post by thih9 » Tue, Feb 24, 2026, 11:44 AM UTC

Crestwave wrote: post #47

thih9 wrote: post #21

Earlier quoted context omitted.

> Tiles are supposed to be free when there is a side free No. According to wikipedia[1]: "A tile is said to be open or exposed if it can be moved either left or right without disturbing other tiles.". Also look at the photo in the wikipedia article[2]. This implementation looks correct to me. [1]: https://en.wikipedia.org/wiki/Mahjong_solitaire [2]: https://en.wikipedia.org/wiki/Mahjong_solitaire#/media/File:...

A "free side" means being exposed on the left or right, matching your Wikipedia quote. On the other hand, OP's implementation checks if it can be moved up or down .

Look at the shape of the puzzle and compare with the wikipedia photo. The sides logic is correct.

Although looks like the images on the tiles were indeed rotated, as mentioned in another comment[1].

[1]: https://news.ycombinator.com/item?id=47115499

Post by snarf21 » Tue, Feb 24, 2026, 2:58 PM UTC

haunter wrote: post #14

snvzz wrote: post #13

Earlier quoted context omitted.

Riichi is the fun one, where skill weights over luck.

I also prefer riichi. Furiten is such a game changer, all other rulesets feel a bit less after that

I design games and have been working on a Red Riichi variant where one of each number is red and this drives scoring instead of all the myriad of Yaku. All the Yaku are hard for beginners to onboard and a lot of hands have to good path to an interesting Yaku and just depend on luck to be able to call Riichi. I'm still testing it but I find it more interesting.

I also have a card game version that implements some of these ideas (although it doesn't have a Furiten concept).

Re: Show HN: 3D Mahjong, Built in CSS

Re: Show HN: 3D Mahjong, Built in CSS