Practice.
Three drills: what a winning hand is worth, what thirteen tiles are waiting on, and which tile to throw when one has to go. All graded by the same engine behind the Studio, so the answer key is the one the rest of the site uses.
Read the wait
Thirteen tiles, one short. Tap every tile that completes it. The reveal shows what each wait pays.
Score the hand
A complete hand with seat, round, flowers and how it was won. Count the fan, or switch on pattern naming for the tournament version, which also requires naming each pattern.
Pick the discard
Fourteen tiles, one has to go. Throw for the widest wait or for the biggest hand. The two are often different tiles.
Your progress and streak stay in this browser — no account. Posting a run to the board is the one thing that leaves it, and only when you choose to: the name you type and the hands the run was made of, nothing else. Rules are HK standard throughout: 13 fan limit, flowers on. See the scoring reference for the tables these hands are graded against.