What is Baiman?
Baiman (倍満) is a scoring tier in mahjong, achieved with 8 to 10 han. The name means “double mangan,” with parent scoring 24,000 points and child scoring 16,000 points.
While not reaching yakuman, baiman represents the highest scoring tier achievable through normal yaku combinations, making it a major goal in mahjong.
Detailed Explanation of Baiman
Baiman Requirements and Points
| Item | Parent (East) | Child (South/West/North) |
|---|---|---|
| Required Han | 8-10 han | 8-10 han |
| Ron Win | 24,000 points | 16,000 points |
| Tsumo Win | 8,000 all | 4,000-8,000 points |
Han Count and Scoring Tiers
| Han Count | Scoring Tier | Parent Points | Child Points |
|---|---|---|---|
| 3-4 han | Mangan | 12,000 pts | 8,000 pts |
| 5 han | Haneman | 18,000 pts | 12,000 pts |
| 8-10 han | Baiman | 24,000 pts | 16,000 pts |
| 11-12 han | Sanbaiman | 36,000 pts | 24,000 pts |
| 13+ han | Kazoe Yakuman | 48,000 pts | 32,000 pts |
Usage Examples
Real Game Situations
Example 1: Baiman Confirmation
"Chinitsu dora 3 - baiman confirmed!"
"Riichi ippatsu tsumo sanankou dora dora - baiman!"
Example 2: Aiming for Baiman
"2 more han would make baiman, let's riichi"
"Got 7 han, tsumo would be baiman"
Example 3: Baiman’s Impact
"Direct baiman hit secures first place"
"Parent baiman tsumo for the comeback!"
How to Build Baiman
Representative Baiman Patterns
1. Yaku Combination Patterns
| Combination Example | Han | Notes |
|---|---|---|
| Riichi(1) + Ippatsu(1) + Pinfu(1) + Sanshoku(2) + Dora 3 | 8 han | Menzen basic form |
| Toitoi(2) + Sanankou(2) + Yakuhai(1) + Dora 3 | 8 han | Triplet combination |
| Honitsu(3) + Toitoi(2) + Dora 3 | 8 han | Flush baiman |
| Chinitsu(6) + Dora 2 | 8 han | Chinitsu is high han |
2. Dora-Utilizing Baiman
Basic yaku 5 han + Dora 3 = 8 han (Baiman)
Basic yaku 4 han + Dora 4 = 8 han (Baiman)
Situations Favorable for Baiman
-
When dora is plentiful
- 3+ dora in hand
- Expect kandora and uradora
-
When high-han yaku available
- Chinitsu (6 han)
- Honitsu (3 han) + other yaku
- Sanankou (2 han) + Toitoi (2 han)
-
When multiple yaku combine
- Pinfu-based: Riichi + Pinfu + Sanshoku, etc.
- Triplet-based: Toitoi + Sanankou + Yakuhai, etc.
Related Terms
- Mangan: 3-5 han scoring tier
- Haneman: 6-7 han scoring tier
- Sanbaiman: 11-12 han scoring tier
- Kazoe Yakuman: 13+ han
- Dora: 1 han per tile
Common Mistakes and Points to Note
Points Beginners Often Mistake
-
7 Han is Not Baiman
- 7 han is haneman
- Baiman starts at 8 han
-
11 Han is Sanbaiman
- Up to 10 han is baiman
- Sanbaiman from 11 han
-
Fu Doesn’t Matter
- 8+ han ignores fu
- Same points whether 30 fu or 70 fu
-
Different from Yakuman
- Baiman is accumulated regular yaku
- Yakuman requires specific patterns
Baiman Occurrence Frequency and Value
Occurrence Frequency
| Scoring Tier | Frequency (Estimate) | Notes |
|---|---|---|
| Mangan | ~10% | Relatively common |
| Haneman | ~3% | Occasional |
| Baiman | ~1% | Quite rare |
| Sanbaiman | ~0.2% | Very rare |
| Yakuman | ~0.03% | Extremely rare |
Value of Baiman
- Point value: Double mangan’s destructive power
- Psychological value: Major pressure on opponents
- Strategic value: Potential for comeback wins
Baiman Tactics
Hand Building Strategy
-
Early game: Focus on high-han yaku
- Look for flush possibilities
- Preserve dora tiles
-
Mid game: Aim for yaku combinations
- Build toward multiple yaku
- Count dora tiles
-
Late game: Balance certainty
- Win securely rather than force
- Use riichi to add han
Baiman Strategy Notes
Risk and Reward:
- Risk of dealing in while chasing high hands
- Choice between certain mangan vs uncertain baiman
- Situational judgment is crucial
Baiman Win Examples
Common Baiman Hands
-
Riichi-based Baiman
Riichi(1) + Ippatsu(1) + Tsumo(1) + Pinfu(1) + Iipeikou(1) + Dora 3 = 8 han -
Flush Baiman
Honitsu(3) + Toitoi(2) + Yakuhai(1) + Dora 2 = 8 han -
Sanankou Baiman
Sanankou(2) + Toitoi(2) + Yakuhai(2) + Dora 2 = 8 han
Conclusion
Baiman is achieved with 8+ han, scoring 24,000 for parent and 16,000 for child. This is the highest scoring tier achievable through normal yaku combinations. With an occurrence frequency of about 1%, achieving baiman brings special satisfaction. The overwhelming points of double mangan can dramatically change the game. Beginners should be aware of baiman potential when holding many dora or high-han yaku. However, avoid overreaching and make situational judgments.