Ryantan

Ryantan

Kanji	リャンタン ペンタン
Fu	Dependent
Tile types waiting	3 or 2 sided wait
Tiles available	11 or 7 tiles
Pattern example

Ryantan 「リャンタン」, kantan, and pentan 「ペンタン」 are a group of complex waits that can wait to complete either a pair or a sequence. They appear as a triplet with a nearby adjacent tile:

• Ryantan: Combination of ryanmen and tanki. Appears as a triplet with a tile adjacent, where none of these tiles are terminals. Example: 2223, which can be treated as 22 + 23 (ryanmen) or 222 + 3 (tanki).
• Kantan: Combination of kanchan and tanki. Appears as a triplet with a tile numerically 2 apart. Example: 2224, which can be treated as 222 + 24 (kanchan) or 222 + 4 (tanki).
• Pentan: Combination of penchan and tanki. Appears as a triplet with at tile adjacent, where either the triplet or adjacent tile are [[terminals. Examples: 1112, which can be treated as 111 + 12 (penchan) or 111 + 2 (tanki).

In order to enter tenpai with any of these waits, the hand must not have any other pairs. If it already has a "stable" pair, the adjacent tile can be treated as a floating tile.

Pattern

Ryantan

Waiting for: , ,

Note: this hand will score pinfu if won on or . If won on the , the hand will have a triplet, thus invalidating the yaku.

Kantan

Waiting for: or

Pentan

Waiting for: ,

Waiting for: ,

Tatsumaki

Main article: Tatsumaki

Tatsumaki can be viewed as two ryantan waits fused together. It consists of two triplets that are 2 ranks apart, and one floating tile between the triplets.

Waiting for:

Note: when this pattern wins on either triplet tile (in this example, or ), the hand can complete a shanpon wait instead of a ryanmen wait. This can be important as the shanpon wait gives more fu, and possibly gives sanankou.

Value

Kantan and pentan are always worth 2 fu, so they cannot be used for pinfu.

Ryantan is worth fu only if it completes the tanki portion. If it completes the ryanmen, no fu is scored, so it can be used for pinfu. E.g. a hand with a 4445 wait can score pinfu when winning with 3 or 6, but not with the 5.