Aida4Ken

Not some new weird Japanese internet slang. It’s another version of suji!

Aida4Ken is basically double suji. If you see both a 2 and a 7 in the discard pool, the ura suji for both of these is 3 & 6. Meaning these tiles are even more dangerous.

The idea is that in a 2457 shape, a player is likely to throw a 2 and a 7 (assuming that they have/draw both and they want a two-sided wait).

This kind of read tends to work early- mid game.

Again, like ura suji, it is much disputed. A player could just as easily be clearing our isolated tiles. They may not be waiting on a double sided wait at all. OR they could have drawn a tile to complete their 45 group so the 3&6 ura suji read as dangerous is defunct.

However, it does have a little more strength than ura suji alone, and might help you dodge that dealer riichi when you have no safe tiles. Use with care!