Keep score for a real table, build a hand and see what it pays, and drill the counting until it's automatic. Hong Kong rules throughout, with the reference tables behind every number.
A live scoreboard for a real table. One person records each hand on their phone; everyone else follows from a share link. Scores, dealer and prevailing wind track themselves, nothing is ever silently edited, and every session survives as a record you can go back through.
Rooms group the tables from one gathering · player stats carry across games · no accounts, the share code is the game.
Drag tiles onto the felt and the studio reads the hand live — what it's called, the itemized fan, what it's waiting on, and how different tables would pay it.
Three drills, all graded by the Studio's engine. One asks what a finished hand is worth, one asks what thirteen tiles are waiting on, one asks which tile to throw. The hand below is self-drawn, West round.
Two waits, one tile apart: 13 fan and 3 fan.
Every fan condition illustrated with tiles, with the fan → points → money pipeline behind each number.
What fan, fu, and limits actually mean, and how the major styles diverge before you pick one.
Slang, trash talk, superstitions and swear words from Cantonese, Japanese, Mandarin and English tables.
Who runs Mahjong Research Co and why the site exists.