r/Mahjong 15h ago

Mahjong

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109 Upvotes

This was my first time ever playing it. And it was amazinggg, haha. I learned it that day, hopefully will get more chances in the future. Do like mahjong? How long have you been playing it? Tell me about you craziest times or wins u had !! I am curious.


r/Mahjong 3h ago

Riichi Riichi variants

4 Upvotes

Wacky Riichi variants y'all enjoy? More than Sanma, Aotenjo, Yami Mahjong, Washizu... Bonus if you can play it with a standard play set


r/Mahjong 21h ago

Riichi My camera-based Riichi Mahjong scoring app’s accuracy skyrocketed after adding synthetic training data

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33 Upvotes

For the last few months I’ve been focused on building RiichiCam, a free web app (works on any device) that makes scoring hands much easier and faster than using a scoring sheet, especially for players that are newer to playing over the board. You take a photo of your winning hand and the app gives you a full yaku, fu, and payments breakdown.

My first attempt at the vision model only used open-source tile images, plus a couple hundred of my own to fill in the gaps. Its accuracy was spotty at best, and it could really only support one tileset. After deciding to add more variety by rendering thousands of synthetic images for model training, accuracy improved to practically perfect in real-world conditions under a variety of tileset styles. I’ve had a few local clubs test it out and have heard great things.

Moving model inference to on-device instead of routing through a server also cut the time from taking a picture to being able to score the hand down to about 200 milliseconds, which I’m super stoked about.

Would love to hear any suggestions you guys might have to make the app more convenient to use! The scanning feature is the most complex part of the app so I want to make sure it’s easy to understand and fast.

If you’re interested, you can check it out at riichicam.com!

(Disclaimer: the majority of the implementation work on this project was done with generative AI, but the product design and engineering decisions are mine.)


r/Mahjong 3h ago

Riichi Why isn't this a winning hand?

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0 Upvotes

Im new and i've been trying to win the mahjong cups at Like a Dragon. I had this hand with a triplet and a pair but i don't know why i didn't win since my oponent dropped that last tile for my hand.

What im doing wrong?


r/Mahjong 17h ago

Riichi Can someone tell me how he won with this hand

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1 Upvotes

I have the two han minimum rule on, as you can see on the second photo but he still won some how? It was godly kazuya he's sitting east and I believe the wind indicator was still east. Sorry if I got any of the terminology wrong I just started learning two days ago.

The Dora is 6 bamboo but he didn't have any because I had them all (I was going to score so many points 😭)


r/Mahjong 1d ago

Ishanten for Daisangen on turn 1

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4 Upvotes

r/Mahjong 1d ago

Tile sets Does anyone know where I can find a set like this?

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4 Upvotes

These tiles are HUGE and I’d love a set of them, found them on marketplace (they sold) and the seller on marketplace said they found them at store that’s like one of those Amazon liquidation centers.


r/Mahjong 1d ago

Advice Looking to learn mahjong with my 9 year old - Game type advice

13 Upvotes

My son is 9, and loves all sorts of board and card games. We have been playing a super basic 2 player version on the phone (I think it's called push, or fingertip, or chasing the tortoise) it's nothing like the actual game, but it's akin to my favorite card game - trash.

Since he's a bit older and enjoys other tactical games, I think he'd like actual mahjong.

However, I've learned there are what feels like 6,000 types of games (it reminds me of Mexican train dominos and all the variants you can try)

So, I'm here to ask - Which type of mahjong is the easiest to learn? Which is the most fun to play?

I'd like to nail down that, before I look at tile sets (though it SEEMS an american set can be used for other types, whereas other sets cannot be used for american)

we live in the US, but it's doubtful we'd ever play with other people.


r/Mahjong 2d ago

Just got 4 kongs, with a seat flower, with a self pick of the pair!!!! (Canton style)

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69 Upvotes

Was playing with my family, in the second seat and self picked the pair after my fourth kong. Im not exactly sure how rare this is, but im fairly sure I'm never getting this hand again even if I play for another 20 years


r/Mahjong 1d ago

Tile sets Where to buy 40mm+ Chinese sets?

1 Upvotes

I play a lot of riichi mahjong and I have an amos prime gear set and a ymi set. Both of which I am happy with.

As with most Japanese sets, these tiles are rather small. Recently ive been thinking about getting into a chinese mahjong variant and I constantly see videos and images of people in China playing with these massive sets and I really want to have at least one set like that.

Ive read that in China they use sets in sizes 42mm+ up to even 50mm and more supposedly.

The problem is I cant seem to find any tile sets online like this. Not even on second hand sites like ebay and Facebook marketplace.

The main things im looking for:

Size 40mm+ the larger, the better

No numbers in the corner

Classic symbols, nothing weird

Able to play Chinese variants like Hong Kong style

No single piece all white sets, I want a set with colored backs.

I live in the US near chicago. Do you think they would have sets like this if I went to a store in Chinatown?

Does anyone know of any reputable online stores where I could get a big set like this?

I feel like if they are so common in China there must be some way of getting my hands on it, but amazon and similar sites are plagued with american mahjong sets that I am not interested in.

Thanks in advance to anyone willing to help with this!


r/Mahjong 1d ago

anyone know any mahjong set/table rentals in Manila, Philippines?

2 Upvotes

we’re looking to rent 5-7 sets/tables for an event. found 1 supplier with a reasonable rental rate but charges ₱20,000 for delivery and set up. looking for more affordable options


r/Mahjong 1d ago

Riichi Used to be a member of the discord i left cause i had to join some other server wanting to join back

1 Upvotes

Anyone got a valid link to the JanKenRen Discord cant find a link anywhere


r/Mahjong 15h ago

I built a simple browser-based Riichi Mahjong game

0 Upvotes

I’ve made quite a few browser-based board game sites, but this was easily the most complicated one so far.

My wife loves Riichi Mahjong, so I spent the last few weeks diving deep into the game while building this, constantly asking her questions and learning everything from chi, pon, and kan to yaku, furiten, dora, and scoring.

I tried to keep the interface simple: open the site and start playing immediately, either against the AI or with friends in a private room.

I’ve tested the rules as carefully as I can, but Riichi has a ridiculous number of edge cases. I’d really appreciate feedback from experienced players, especially if you spot any rule, scoring, or UI issues.

RiichiMahjong.com

AI disclosure: AI tools were used to assist with some visual assets and the development of the game.


r/Mahjong 1d ago

NYC Open Games

1 Upvotes

I'm spending several weeks in NYC in September and am looking for open American MJ games for experienced players that welcome single players. Brooklyn or Manhattan. Thanks!


r/Mahjong 1d ago

Should I buy a a table with a padded vinyl top for mahjong?

5 Upvotes

I'm looking to buy a table to play and I found a cheap one on target but I don't know if there would be an issue. For context I play riichi mahjong and already own a junkmat.


r/Mahjong 1d ago

Who play this way?

2 Upvotes

Who play with a wild/joker tile and you only can win from drawing a tile and your only allow pong and Kong only. After you pick up 6 tile for points. What is this rule call and do the have a app for it so I can practice playing


r/Mahjong 2d ago

Riichi Best Advanced beginner Guide?

7 Upvotes

I know all of the rules and 95% of the yaku. And I know the absolute basics to tile efficiency like stop going for a triplet if you see 2 others on the board, and other minor stuff like that. To go for waits if you can. Dropping useless honor tiles. Gunning for Dora if I can. But very basic stuff, I also can't really tell what kind of hands my opponents have unless they do obvious stuff I.e. calling pon or chii on something with a terminal or a non seat or round wind triplet, off of that I can guess what they have going on but that's pretty obvious. As well as I can usually not feed a win if I'm not paying attention but again only from not ditching any honor tiles last minute or just discarding what has been recently discarded. I'm adept 2 in mahjong soul if that means anything lol


r/Mahjong 2d ago

Yakuman What A WAY to start off a Hanchan tonight

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29 Upvotes

Kudos to Akagi for causing the starting dealer to go down in East 4 so it didn't drag too long after lol


r/Mahjong 3d ago

Riichi Shin Janki bros perfect game night!

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101 Upvotes

Will always prefer this to a auto table!


r/Mahjong 2d ago

Riichi Set Questions

5 Upvotes

Hello all! I came across the Yellow Mountain Imports Riichi sets and just wanted to know/confirm people’s experiences with them.

For context, I do have other sets, primarily Chinese sets, however they don’t deliver exactly the balance I’m looking for. One is too heavy to carry around, the other is highly portable at the expense of being very light so walls and hands can break if not being careful

I was thinking of getting the black set but am concerned about visibility and/or beginner friendliness. Does the environment lighting heavily affect the tile’s visibility? There is a slight possibility I might use this set to teach some friends how to play and am wondering: is such a set a good enough starting point considering its nonstandard colors?

Also, on the product page, it says it weighs 5.5lbs/2.5kg. I just want to know if it actually weighs that much including the case and all its tiles and accessories inside.

All that being said, I personally prefer the black one for myself but don’t mind getting the white with yellow back set.


r/Mahjong 3d ago

Can I take a Pung instead of a Kong to declare the Kong in a later round?

10 Upvotes

I‘m talking about HK Mahjong here.

Following situation:

  1. I have in my hand the following:
    2x red dragon, 3x bamboo 6, 1x bamboo 7.

In the discard pile is a bamboo 6.

Instead of calling a kong with 3+1x bamboo 6, I call a Pung for 2+1x bamboo 6. Leaving one bamboo 6 in my hand.

  1. In my hand are now:
    2x red dragons, 1x bamboo 6, 1x bamboo 7.

Literally next round there is a red dragon in the discard pile.

I call a Pung for the red dragons -> declare a Kong with the remaining bamboo 6 -> pick a tile from the back of the wall and get a bamboo 7 -> Mahjong.

This was incredible lucky and my final Fan-count was 10.

But now I‘m not sure if this move was legal. So my question is, can you pick a Pung instead of a Kong, so that you can call a Kong later on with the tile that remained in your hand?


r/Mahjong 3d ago

Riichi How do I get this water stain off my Amos junk mat?

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0 Upvotes

Hey so I went to a Riichi mahjong club in my area and I let them use my junk mat and when I got it back it had this stain on it, looks like a water stain. Is there anyway I can remove it?


r/Mahjong 4d ago

One of the craziest non-yakuman hands ive opened with

13 Upvotes
Only 3200 unfortunately lol

r/Mahjong 4d ago

Chinese Are these replacement tiles?

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5 Upvotes

These tiles are part of a Chinese mahjong set. Are these meant to be replacement tiles in case you lose or damage any tiles? The set also came with four blank tiles so I am perplexed.

Google Translate said the characters mean “versatile” but I always take their translations with a huge grain of salt.


r/Mahjong 4d ago

Riichi Tips for a desperate beginner

8 Upvotes

I have only recently gotten big into Riichi Mahjong while playing Doma Mahjong in FFXIV and watching people lay Mahjong Soul and I am...extremely bad at Mahjong... I've gone thirteen games in a row and only one of them did I come in second, every other one was fourth place and that was just today, I haven't had much luck the previous days either.

I don't know what I'm doing wrong. I try to stick with waiting for riichi and I lose. I go all simps and I lose, I try defensive and it feels like I give the person the exact tile he needs to ron me. I am desperate and in need of help, any help.