Quick answer
A blind pass sends on tiles you received without looking at them. It is allowed only on the last pass of each Charleston, for one, two or all three tiles.
New players hear 'blind pass' and assume it is a mistake or a dare. It is neither. It is a specific, legal option inside the Charleston, and knowing when to use it is a small edge that costs nothing to learn.
What a blind pass actually is
During the Charleston you pass three tiles at a time. A blind pass means passing along tiles you received without looking at them, or passing fewer of your own tiles than three and filling the rest from what was just handed to you, unseen.
The tiles move on without ever entering your hand. You never learn what they were, and neither does the table.
When it is legal
The blind pass is allowed on the last pass of each Charleston and nowhere else. That is the left pass that ends the first Charleston and the right pass that ends the second. On every other pass you send three tiles you have looked at, out of your own rack.
You may pass one, two or all three tiles blind, taking them from what has just arrived to fill out your three. It is never permitted on the courtesy pass at the end, which is a mutually agreed swap of an equal number of tiles, both players looking.
If all four players are waiting to see what arrives before deciding how many to send blind, somebody has to go first. The sanctioned tournament rules give that to East, who holds the extra fourteenth tile. East completes the pass first, and the others follow.
If you look at a tile you are passing blind
No. A tile passed blind goes on unseen, which is what makes the pass blind. The sanctioned tournament rules call a blind pass stealing a tile, and a player who steals a tile may not look at it.
Under those rules a player who looks is penalized ten points at the end of that game. The penalty is part of tournament scoring, so a home table that wants a rule for it should agree one before play.
Why anyone would do it
Because you already have what you need. If your hand is committed and none of the incoming tiles could plausibly help, taking three unknown tiles into your rack means sorting them, evaluating them, and passing three away again, all of which risks passing something you actually wanted.
It is also a tempo move. A blind pass is fast, and in a group that plays briskly, a player who blind passes a settled hand keeps the Charleston moving.
The cost
You give up information and you give up an option. Any of those unseen tiles could be the pair tile or the third tile of a pung that changes your hand's direction entirely, and you will never know. It is never a joker, because a joker can never be passed in the Charleston.
That is why blind passing is a late-Charleston move for a settled hand, not an early one. Passing blind before you know where your hand is going is just gambling with your own deal.
A simple rule
If you can name the card section you are building toward and you are only missing tiles of a specific kind, a blind pass is safe and efficient. If you are still choosing between two directions, look at everything, every time.
That decision, whether your hand is settled enough to stop looking, is exactly the judgment the coach makes explicit when it reads a hand. It weighs not just which tile but whether the hand has committed yet.
Put it into practice
New to the game? Start the course at Lesson 1, Meet the Tiles. The first three lessons are free and need no account.
Already play? Have the coach read a real dealt hand for you, free. It names the direction the hand goes for, what to keep, what to pass, and the reasoning behind each call.
Whether to pass blind comes down to how settled your hand is. Mei, our AI coach, reads a dealt hand, names the direction it goes for, and says what to keep and what to pass, free.