Definition
The wall is the four rows of face-down tiles, nineteen long and two high per player, that all draws come from during a hand.
East breaks the wall with a dice roll, and the hand ends as a wall game if the wall runs out before anyone wins.
At the table
The wall is a clock nobody watches until it is nearly out. Counting roughly how many turns are left changes decisions. With plenty of wall you can hold two directions, and with a quarter left you should be committing or defending. The mistake is playing the last ten turns exactly like the first ten, which is how people throw the winning tile to a rack showing two exposures.
Read the full guide: How to Set Up an American Mahjong Game: Wall, Deal, and Seats.
Lesson 9, Defense: Reading the Table, teaches this in its step "Playing for the wall". It comes with the Club. See what Lesson 9 covers.
See it on real tiles. The AI coach reads a dealt hand, free, and names the direction it goes for, what to keep and what to pass, at the free read.
Want the coach on call? The Club adds the coach for your own tiles and for each morning’s hand, all 10 lessons, and every new NMJL card taught the week it lands, for $14.99 a month, cancel anytime. See what the Club includes.
Related: East, Wall game, Dead hand, Concealed hand. All 52 terms.