Senki Suji

Honestly, you don’t need to read this. This is where things get totally batshit.

Senki suji is basically the ura suji of your ura suji.

You can identify senkisuji in a discard pool but it’s only really a good way to understand a hand’s progression afterwards.

Senki suji is formed thusly:

In your hand you have a (1)(4) shape. For efficiency, you throw the (1) early and later pick up a (3) or (5) to make that (4) useful. These reads only work in very early discards.

That’s all wonderful, but when trying to read an opponent’s discard pool and you see a (1), it could just as easily be an isolated tile. Therefore, I wouldn’t bother trying to use this to read while playing. But perhaps this small knowledge will help you understand discard pools when studying, so just learn it as a word you can describe something — not as a tool.