The Daily

In American Mahjong you start with thirteen tiles and a card of the hands you are allowed to build. Before anyone plays, there is the Charleston: everybody passes three tiles around the table, blind, several times over.

At the deal, no hand is close. So the skill is not picking one and chasing it, it is keeping as many hands reachable as you can while shedding the tiles that serve the fewest. This puzzle is exactly that decision, scored: your three tiles are graded on how much the ten you kept are still worth.

You get three attempts. After each one, every tile you passed tells you whether it belonged in the perfect pass, so the second guess is a better-informed one than the first. There is often more than one perfect answer, and when there is, we say so.