Reachmahjong.com

As Kime notes there, that's a Ryankan structure - two adjacent Kanchan.

If you reach on this, dropping one of the end tiles, it's called Hikkake Riichi. You can trick your opponents with this - for example say you have 3_5_7 and reach by discarding the 7... they might assume that your discarded 7 means that the 4 is safe too (you'd be Furiten on a _56_ Ryanmen wait for 4 or 7) when it's totally not.

That's a classic metagame example. Against total beginners, a hikkake riichi is just a kanchan because they don't understand defense. Against medium players, it will make them play into your hand because of the suji. And more advanced players recognize the pattern and will avoid discarding the hikkake tiles.

Yea. Just making sure these waits, and many more things about this game, gets documented well within Saki Wikia. Eventually, similar material may be taken over to "real" Wikipedia. Though, I have to wonder -- if -- I should resort to using these terms in the first place and just describe the various waits in English. It is under my expectation for anyone reading the game via a Wiki to be new.

Barticle wrote:If you reach on this, dropping one of the end tiles, it's called Hikkake Riichi. You can trick your opponents with this - for example say you have 3_5_7 and reach by discarding the 7... they might assume that your discarded 7 means that the 4 is safe too (you'd be Furiten on a _56_ Ryanmen wait for 4 or 7) when it's totally not.

Like this, right?

http://forums.animesuki.com/picture.php ... reid=45078

My low score in that game, resorted me to target a potential "chankan" off a closed 7-man wait -- just to make me feel better.

I used to think the Chuuren Poto was the only 9-way wait, but there's actually two more shapes.

7gate:

waits on
( )

8gate:

waits on
( )
OR

waits on
( )

Both waits wait on every tile in the suit, but they aren't fully nine way because there's 4 of one or two tiles already. If a 5th one came via haku pocchi or goumoupai, it would complete the hand. Regardless, the amount of tiles waited on is of course 9*4 - 13 = 23 tiles, same as Chuuren.

The 7gate is a tatsumaki extended with with a shuntsu on both sides, while the 8gate is an extended happoujibin.

Also, if 0 and 10 existed, Chuuren would wait on both, 8gate on the one next to the terminal, and 7gate on neither. So 11 gates, 10 gates and 9 gates? Arata would love the 2223456777789.

Eheheheheh, there's even more. Of course if the 8gate waits on 0123456789, you can switch it one tile to the right to get a 12345678910 wait. So

and

Both wait on all 9 tiles. Now the shape also resembles a chuuren with the other triplet moved.

Then there is this:


This is the 7th shape that waits on 23 tiles total. However, unlike the 8gate and 7gate it does not wait on the tiles it has 4 of. It is created by taking a 3335777 Two-sided kantan, and extending it with 234 and 678.

Japanese Wiki:

https://ja.wikipedia.org/wiki/聴牌

Apparently, a lot of patterns are named. I just can't read them.