A Racked Tile Sits on the Slope (Article ID 2)
Abstract: When a player places a tile on the sloping part of their rack it is considered a racked tile. Merely a tap or a touch of to any part of a player’s rack does not define it as a racked tile.
Question from a player: When is a tile considered “racked”?
Answer from the NMJL: “ A racked tile is defined as a tile that has been placed on the sloped part of the rack along with the player’s other tiles.”
Source: Mah Jongg Made Easy 2020 page 19 #11
Other answer from the NMJL:
” A tile is considered to be racked when it is sitting in the sloped area of the rack, along with a player’s other tiles. Tapping or clicking the tile is not racking, nor is it considered racked if it is merely touching any other part of your rack.”
Source for other answers: National Mah Jongg League Bulletin Q&A 2018https://www.nationalmahjonggleague.org