Ittsu

Conditions

• The hand must contain 1-2-3, 4-5-6, and 7-8-9 as three separate sequence melds, all in the same suit
• The remaining meld and pair can be anything
• Worth 2 han when the hand is closed, 1 han when open
• The three sequences must use tiles from a single suit (all characters, all circles, or all bamboo)

Strategy Tips

• When you already have two of the three required sequences in one suit, prioritize completing the third. The middle sequence (4-5-6) is usually easiest to complete since those tiles have the most flexibility.
• Ittsu combines well with honitsu or chinitsu since you are already committing heavily to one suit. Adding honor tiles alongside can build toward honitsu.
• Be careful not to accidentally break an ittsu by calling chi on a tile that rearranges your sequences. For example, if you have 1-2-3 and 4-5 and someone discards a 3, calling chi for 3-4-5 leaves you without the 1-2-3 sequence.