No. It is a rule of thumb. The best pass depends on the hand you are building, and that depends on your card. This tool does not read or use the NMJL card, so it works only from how your tiles group. Treat it as a sensible starting point.

Jokers can never be passed in the Charleston, not even in the courtesy pass. Any Jokers on your rack stay with you, so the assistant leaves them out.

You pass three tiles at a time. The first Charleston is required: right, then across, then left. A second Charleston, left, across, right, happens only if every player agrees. After that there is an optional courtesy pass with the player across, where you exchange zero to three tiles by agreement.

East, the dealer, starts with 14 tiles and everyone else with 13. Choose your rack size at the top and add the tiles you hold. You can use the assistant before any pass, entering whatever is on your rack at that moment.

It keeps pairs and sets together, keeps tiles that connect to each other in the same suit or by matching numbers, and passes lonely tiles first. Single winds and dragons and single flowers go before suit tiles with company. The table above the FAQ lists every rule.

Bams are bamboo, Craks are characters and Dots are circles. If you are unsure which tile is which, practice with the Tile Trainer.

No. Your rack stays in your browser and nothing is stored or sent to us. Refresh the page and it starts again.

Check your table’s rules first. Many in-person tables do not allow phones during play, and online platforms often do not allow outside tools. It works best for practice and for reviewing a game afterwards.