Play a Chow meld when you have a sequence of three tiles of the same suit.
You can play a Chow either as "concealed" Chow (i.e. you have the sequence concealed in your hand), or as a "revealed" Chow when you use two tiles from your hand along with the most recent discarded tile. Revealing a Chow is restricted such that you can only reveal your Chow using the discarded tile from the player to the left of you.
You cannot Chow honors, and you cannot play a revealed Chow using a discarded tile from players across from you or from your right.
