What is Honchantaiyaochuu? Chanta Requirements and Strategy Explained for Beginners

What is Honchantaiyaochuu (Chanta)?

Honchantaiyaochuu (混全帯么九) is a 2-han mahjong yaku where every set and pair includes yaochuuhai (terminals 1, 9, or honors). Commonly called “chanta,” it’s a beautifully formed yaku combining terminal and honor tiles.

Worth 2 han when closed, it’s still valid when open but drops to 1 han (kuisagari). The opposite concept from tanyao, it’s somewhat difficult for beginners but broadens hand possibilities once learned.

Detailed Explanation of Honchantaiyaochuu

Establishment Conditions

For honchantaiyaochuu to be valid, all these conditions must be met:

Usable and Unusable Sets

Usable sets (○):

Unusable sets (×):

• , , , , (simples-only sequences)
• through (simple triplets)

Closed vs Open Difference

Usage Examples

Real Game Situations

Example 1: Hand Composition Judgment

"Many terminals, let's aim for chanta"
"Have honors too, chanta is visible"

Example 2: Calling Judgment

"Chanta confirmed, chi :1m::2m::3m:"
"Even with kuisagari, still 1 han, OK to call"

Example 3: Choosing with Junchan

"Debating discarding honors for junchan"
"Chanta is easier, keep honors"

How to Build Honchantaiyaochuu

Basic Steps

1. Check yaochuuhai

   • Count 1, 9, honor tiles
   • 4+ sets promising

2. Be conscious of terminal sequences

   • Treasure , taatsu
   • Aim for →, →

3. Secure at least one honor set

   • Pair or triplet OK
   • Two birds with yakuhai

4. Organize simples

   • Break up early
   • Shift toward terminals

Complete Hand Examples

Closed example:

:1m::2m::3m: :7p::8p::9p: :1s::1s::1s: :2z::2z::2z: :9m::9m:

With calling example:

Hand: :1m::1m::1m: :4z::4z::4z: :9s::9s:
Chi: :1p::2p::3p:, :7s::8s::9s:

Related Terms

• Junchan: Upper yaku not using honors (3 han)
• Yaochuuhai: General term for 1, 9, honors
• Routouhai: Only 1, 9 numbered tiles
• Jihai: East-South-West-North-White-Green-Red
• Kuisagari: Han decrease when calling

Common Mistakes and Points to Note

Points Beginners Often Mistake

1. Honors are mandatory

   • Without honors it’s junchan
   • Must include at least one honor set

2. Simples-only sets are NG

   • Having invalidates it
   • All sets need yaochuuhai

3. Pair also yaochuuhai

   • Simple pairs like NG
   • Need , , etc.

4. Just terminal edge in sequence OK

   • Only the “1” in satisfies condition
   • Only the “9” in satisfies condition

Compatible and Incompatible Yaku

Commonly Combined Yaku

Incompatible Yaku

• Tanyao: Opposite yaku
• Pinfu: Yakuhai pair NG
• Chiitoitsu: Special form

Strategic Points

When to Aim for Chanta

1. Many yaochuuhai in starting hand

   • 8+ terminal and honor tiles
   • More promising than tanyao

2. Dora are yaochuuhai

   • Naturally becomes chanta
   • Can expect high points too

3. Want to progress defensively

   • Honors relatively safe
   • Terminals also safe late game

Chanta Advantages and Disadvantages

Advantages:

• Valid even when called
• Easy combination with yakuhai
• Can change to other yaku
• Can utilize honors

Disadvantages:

• Difficult to make (about 1% occurrence)
• Drops to 1 han when open
• Can’t use simple dora
• Waits easily limited

Practical Tips

Early Game Judgment

Guidelines for chanta:

• 8+ yaochuuhai tiles
• 2+ terminal taatsu
• Have honor pair

Comparison with other yaku:

• Tanyao: Switch if many simples
• Junchan: Aim for upgrade without honors
• Toitoi: If triplet-type, go toitoi

Calling Judgment

Actively call when:

• or confirmed
• Remaining taatsu are good waits
• Quick win priority

Avoid calling when:

• Aim for high points closed
• Riichi possibility
• Change to junchan

Conclusion

Honchantaiyaochuu (chanta) is a beautifully formed 2-han yaku including yaochuuhai in every set and pair. The opposite concept from tanyao, it requires valuing terminal and honor tiles. Somewhat difficult to make, but actively aim for it when starting hand has many yaochuuhai. For beginners, first learn the basics: “yaochuuhai in everything” and “at least one honor set required,” then become able to switch between tanyao and chanta. Valid when called, so flexible response according to situation is important.