Right vs. wrong at a glance
We use real vector tile faces so they stay sharp when enlarged. Below we show only the tile-count structure of a Charleston pass — rounds and direction follow the official NMJL rules.
In the first Charleston you must pass exactly 3 tiles to the player on your right; everyone passes and receives at the same time.
Passing too many or too few is a violation and that round must be replayed. Jokers may be passed too, but the count must still be exactly 3.
The Charleston
The opening tile exchange is the most distinctive mechanic in American mahjong and the one beginners most often get wrong. Everyone passes at the same time — you pass, then you receive.
The required sequence
Three tiles right
Select three unwanted tiles and pass them to the player on your right. You receive three from the player on your left at the same moment.
Three tiles across
Swap three tiles with the player directly opposite you. Both passes travel simultaneously.
Three tiles left
Pass three to the left and receive three from the right. Once this pass lands, the required Charleston is complete and East discards.
The second Charleston
Many tables play a second round immediately after the first, with the direction reversed: left, then across, then right. If any player declines, the second Charleston is skipped for the whole table.
The courtesy pass
After the Charlestons, opposite players may agree to exchange up to three more tiles. It is entirely optional — either player may decline, and declining is completely normal and never rude.
Never pass a joker
Jokers may not be included in any Charleston pass. If you are dealt an awkward number of them, you keep them — which is exactly why a joker-heavy opening hand can be harder than it looks.
What to pass: a working heuristic
Pass your least coherent suit first — the one whose tiles do not cluster around any number the card cares about. Keep tiles that already form pairs or that sit in the same number family, because Like Numbers and the even and odd sections all reward concentration.
As you improve, add a second lens. The Charleston is the only moment in the game when you can actively harm a neighbor: deliberately breaking up a suit so the next player cannot use it is a real tactic. But it is a poor trade for a beginner. Keep your own hand coherent for your first few months.
Charleston 传牌时别当老好人——你送出去的每一张舒服牌，最后都会变成对手推倒胡时，打在你脸上的响亮耳光。
During the Charleston, don't be a pushover. Every cozy tile you pass will come back as the slap on your face when your opponent declares mahjong.