A Kong (Gàng) is a set of four identical tiles. Unlike a Pong (three tiles), a Kong requires one extra step: declaring it and drawing a replacement tile from the end of the wall. This extra draw is powerful — but Kong also comes with risks. Knowing when to Kong and when to skip is one of the most impactful decisions you make in each round.
1. The Three Types of Kong
Open Kong (Míng Gàng)
You have a Pong already exposed on the table, and an opponent discards the fourth matching tile. You claim it to complete the Kong. This Kong is fully visible to all players.
Concealed Kong (Àn Gàng)
You draw the fourth tile to a triplet you are already holding in your hand. You declare the Kong by revealing all four tiles face-down (only the outer two are shown briefly). This Kong does not reveal what tile it is to opponents — a significant secrecy advantage.
Promoted Kong (Bǔ Gàng)
You have an exposed Pong and later draw the fourth matching tile from the wall. You add it to promote the Pong into a Kong. This is riskier — opponents can claim the promoted tile for a winning hand.
2. Why Kong Is Powerful
- Extra draw. You get an additional tile from the wall, effectively advancing your hand by one step without spending a turn waiting.
- Scoring bonus. Kong sets pay extra. In Blood Battle Mahjong, Kong settlements happen immediately — all opponents pay you a fixed amount when you declare any Kong.
- Hand flexibility. A concealed Kong does not reveal your void suit or hand direction, keeping opponents uncertain about what you need.
3. Why Kong Is Risky
- Reveals information. An open or promoted Kong shows opponents exactly which tile you hold four of, helping them read your hand structure.
- Changes your hand. A Kong replaces a tile in your hand with a new draw. If your hand was perfectly shaped for tenpai, the Kong draw might not help and could delay you.
- Flower Pig risk. If you declare a Kong but your void suit tiles are not yet cleared, you now have one more tile in hand to manage. Every tile that disrupts your void-clearing puts you at Flower Pig risk.
- Promoted Kong danger. When you promote a Pong to Kong, you briefly expose the promoted tile. An opponent who was waiting for that exact tile can claim it for a win — and you pay them as the discarder!
4. When to Declare Kong
Kong is correct when the benefits outweigh the risks. Ask yourself these questions:
- Is my void suit already cleared? If not, delay until your void tiles are gone. The extra draw from Kong could disrupt your void-clearing plan.
- Am I close to tenpai? If you are 2+ tiles away from tenpai, Kong's extra draw is very valuable. If you are already in tenpai, think carefully — the draw could force you to discard a useful tile.
- Is the Kong tile in my non-void suits? If you are Konging a tile from your void suit, something has gone wrong. Kong tiles must be from your active suits.
- For promoted Kong: is anyone close to tenpai? If opponents have been quiet (no Pongs, discarding smoothly), it may be safer. If someone looks close to tenpai on the tile you are promoting, skip it.
5. When to Skip Kong
- You are already in tenpai — do not disrupt your wait unless the Kong draw is very likely to help.
- Your void suit is not yet cleared — finish clearing first.
- The promoted tile is a tile that fits common tenpai waits — like a middle tile (4, 5, 6) that many hands could be waiting on.
- You have other immediate priorities (like clearing dangerous tiles from your hand).
6. Concealed Kong vs Open Kong
| Property | Concealed Kong | Open Kong | Promoted Kong |
|---|---|---|---|
| Tile source | Draw all 4 yourself | Opponent discards 4th | Draw 4th from wall |
| Visibility | Hidden (best) | Fully exposed | Exposed when promoted |
| Danger to you | Low | Low | Medium — can be stolen |
| Information revealed | Minimal | Full tile revealed | Full tile revealed |
| Best when | Hand is well ahead | Opponent discards freely | Low-risk situation |
7. Kong in the Endgame
As the wall runs low (fewer than 15 tiles remaining), be careful about declaring Kongs. Each Kong draw takes one tile from the dead wall, which shortens the live wall. Declaring a Kong when the wall is nearly empty can trigger the end of the round before anyone wins — and then tenpai checks and Flower Pig penalties apply. If you are not in tenpai when the wall runs out, you pay all players who are. Do not Kong yourself into a losing position.