Pure Chuuren Poutou (9-Sided Wait) - The Ultimate Yakuman Form

What is Pure Chuuren Poutou?

Pure Chuuren Poutou (Pure Nine Gates) is the ultimate form of the yakuman Chuuren Poutou where the hand is waiting on all 9 tiles of the same suit. With the base shape 1112345678999, any tile from 1-9 in that suit completes the hand - the most beautiful form in mahjong.

Often treated as double yakuman, it’s called “Tenui Muhou” (Divine Perfection) - truly a work of art in mahjong.

Requirements

Condition	Details	Notes
Base shape	1112345678999	13 tiles
9-sided wait	All 1-9 are winning tiles	Any completes it
Menzen only	No calls allowed	No ankan either
Same suit	Man, pin, or sou	No mixing

The 9-Sided Wait Structure

Hand: 1112345678999m
Wait: All 1-9m (9 types)
Feature: Ultimate beauty

Completion Patterns

Winning Tile	Interpretation	Meld Structure
1	Becomes triplet	111 123 456 789 99
2	Three sequences	11 123 234 567 899
3	Standard form	11 123 345 678 999
4	Standard form	111 234 456 789 99
5	Becomes head	111 234 567 899 9
6	Standard form	111 234 567 789 99
7	Standard form	11 123 456 789 999
8	Three sequences	11 123 456 788 999
9	Becomes triplet	11 123 456 789 999

Double Yakuman Treatment

Rule Variations

Rules	Pure Chuuren	Regular Chuuren	Notes
Standard	Double yakuman	Single yakuman	Widely adopted
Pro leagues	Double yakuman	Single yakuman	Official rules
Some areas	Single yakuman	Single yakuman	No distinction
Online	Varies	Single yakuman	App settings

Pure vs Regular

Pure Chuuren Poutou: 9-sided wait → Double yakuman
Regular Chuuren Poutou: 1-8 sided wait → Single yakuman

Example: 11123456789999m
Wait: Only 1m (1-sided) → Regular Chuuren

Probability

Rarity Statistics

Chuuren Poutou overall: ~0.0003%
Pure Chuuren Poutou: ~0.00003%
Less than 1/100th of other yakuman

Comparison

Yakuman	Occurrence	Ratio to Pure
Suuankou	0.05%	1667x more
Kokushi Musou	0.04%	1333x more
Regular Chuuren	0.0003%	10x more
Pure Chuuren	0.00003%	Baseline

Why It’s the Ultimate Form

Beauty Elements

Aspect	Reason	Meaning
Completeness	Uses all 1-9	Numerical perfection
Symmetry	Three 1s and 9s	Beautiful balance
Potential	All 9 as waits	Infinite possibility
Purity	Single suit	No mixture

Legendary Status

Once in a lifetime
- Statistically accurate
- Rare even for pros
Divine perfection
- Beyond human artifice
- Natural beauty
Eternal aspiration
- Every player’s dream
- The ultimate goal

Verification Method

Checking 9-Sided Wait

Base shape: 1112345678999

Draw 1 → Does it complete? → YES
Draw 2 → Does it complete? → YES
Draw 3 → Does it complete? → YES
...
Draw 9 → Does it complete? → YES

All YES = Pure Chuuren Poutou

Common Non-Pure Examples

Example 1: 1123456789999m
→ Only 2m wait (1-sided)

Example 2: 1112345677899m
→ 6m 8m wait (2-sided)

Example 3: 1112234567899m
→ Chinitsu multi-wait (not Chuuren)

Common Mistakes

Shape errors
- Need three 1s and three 9s
- One each of 2-8
- Any deviation invalidates it
Wait miscounting
- All 9 types must win
- Missing even one = not pure
- Don’t break the shape
Calling temptation
- Absolutely no calls
- Ankan also invalid
- Must be pure 13-tile form
Suit mixing
- Single suit only
- No honor tiles
- No other number suit

Strategic Reality

Should You Aim for It?

Practical advice:

Keep it as a dream
- Goals matter
- But don’t obsess
- Enjoy the game first
When chance appears
- Go all in
- Courage to commit
- No regrets
Even without achieving
- The attempt has value
- Regular Chuuren is amazing
- Enjoy the journey

Chuuren Poutou: Nine Gates yakuman
Chinitsu: Same-suit hand
Tamen-machi: Multi-sided wait
Yakuman: Highest scoring hands
Double Yakuman: 2x yakuman value

Summary

Pure Chuuren Poutou is the 9-sided wait version of Nine Gates - the most beautiful and difficult yakuman in mahjong. With the shape 1112345678999 waiting on all tiles 1-9, it’s often treated as double yakuman with about 0.00003% occurrence. It’s virtually impossible to achieve intentionally, but remains the eternal dream of every mahjong player. Pure Chuuren represents the ultimate beauty and perfection of mahjong.