Seven Pairs (七對子): How to Win Hong Kong Mahjong with Nothing but Pairs
Most winning hands in Hong Kong Mahjong follow the same blueprint: four melds (chows, pungs, or kongs) plus one pair. Seven Pairs (七對子, chat deoi ji) throws that blueprint out entirely. Instead of melds, you build your entire hand from pairs, seven of them, covering all 14 tiles you hold when you win. No chows. No pungs. Just pairs, from the first tile to the last.
It is one of the most satisfying hands to complete because it looks nothing like anything else at the table.
The Structure of Seven Pairs
A standard winning hand in Hong Kong Mahjong has this shape:
[meld] + [meld] + [meld] + [meld] + [pair]
Seven Pairs has this shape instead:
[pair] + [pair] + [pair] + [pair] + [pair] + [pair] + [pair]
That is exactly 14 tiles, the same count as a normal winning hand. The difference is that every single group of two tiles must be a matching pair. You are not building toward chows or pungs. You are collecting pairs across different suits and honors until you have seven of them.
A valid Seven Pairs hand might look like this:
- 2-character + 2-character
- 5-bamboo + 5-bamboo
- 9-circle + 9-circle
- East wind + East wind
- Red dragon (中, chung) + Red dragon
- 7-bamboo + 7-bamboo
- 3-character + 3-character
Fourteen tiles. Seven pairs. Done.
How Many Faan Is Seven Pairs Worth?
Seven Pairs scores 4 faan in standard Hong Kong Mahjong. That is a respectable base before any bonuses for flowers, seasons, or suit combinations.
Because Seven Pairs is a fully concealed hand by nature (you cannot meld any tiles and still maintain the pair structure), you might wonder whether you also earn the Concealed Hand (門前清) bonus. In most Hong Kong rule sets, you do not. Seven Pairs is treated as its own distinct pattern, and the concealed bonus does not stack on top of it. The 4 faan is the hand’s own value.
Similarly, Seven Pairs does not qualify for Common Hand (平和), which requires four chows plus a pair. For a full breakdown of how faan values stack across every hand, the complete faan guide covers every pattern in detail.
The Duplicate Pairs Rule: One of Mahjong’s Great Debates
Here is where Seven Pairs gets complicated: can you hold two identical pairs?
Imagine you have drawn a second pair of 5-bamboo while building your hand. Can you count both pairs as two separate entries toward your seven? Or does each pair need to be a unique tile type?
There is no single universal answer. Hong Kong Mahjong groups are divided:
| Rule | What it means | Common in |
|---|---|---|
| No duplicates | All 7 pairs must be different tile types | Traditional Hong Kong rules |
| Duplicates allowed | You may use two or more pairs of the same tile | Some local house rules |
The strict version, requiring all seven pairs to be different tile types, is more common in formal Hong Kong play. Under this rule you cannot hold four of the same tile and split them into two pairs. You need your pairs to spread across at least seven distinct tile types.
The relaxed version allows duplicates, which makes the hand slightly easier since four-of-a-kind can count as two pairs.
Confirm which version your table plays before anyone draws their first tile. Getting this wrong mid-game causes the kind of argument that ruins the mood for the whole session.
What Seven Pairs Can and Cannot Combine With
Seven Pairs has specific stacking rules that differ from most other hands.
It cannot combine with:
- Common Hand (平和): requires four chows, incompatible structure
- Concealed Hand (門前清): Seven Pairs is treated as its own pattern in most rule sets
- All Triplets (對對和): requires four pungs, incompatible structure
It can combine with:
- Full Flush (清一色): if all seven pairs come from a single suit, you add 7 faan on top, giving a combined total of 11 faan. That pushes you to or near the limit in most rule sets. For more on Full Flush and how it transforms a hand’s value, see Full Flush explained.
- Mixed One Suit (混一色): if all seven pairs come from one suit plus honor tiles, some rule sets apply the mixed one suit bonus.
- Bonus tiles: flower and season tiles still count as normal bonuses alongside Seven Pairs.
The Full Flush combination is the dream version of Seven Pairs. Seven pairs all from the same suit, say seven bamboo pairs arranged in a satisfying sequence. It is extraordinarily rare, but when it lands it pays at or near the limit.
When to Chase Seven Pairs and When to Fold
Seven Pairs is a high-risk, medium-reward hand. Here is how to think about it at the table:
Chase it when:
- You are already holding four or five pairs after your first full draw
- The tiles you need as pairs are common number tiles rather than rare winds or flowers
- Other players seem to be building in different suit directions, reducing competition for your tiles
Abandon it when:
- You are past the halfway point of the wall and still hold only three or four pairs
- The pairs you need have already appeared in discards (once two copies of a tile are gone, that pair is dead)
- An opponent is discarding at a pace that suggests they are close to winning
One underrated risk with Seven Pairs is the draw dependency. Because you hold no open melds, you receive no tiles from discards. Every pair must come from your own draws or from a tile you are waiting for that an opponent happens to discard. Patience is the primary skill. You are playing a slower, more solitary game within the same game everyone else is playing.
This contrasts sharply with a concealed chow hand, where you can win on a wider variety of discards. For a comparison of how concealed hands play out, concealed hand strategy covers the decision-making in detail.
A Quick Note on Seven Pairs Across Hong Kong Rule Variants
Not every Hong Kong table includes Seven Pairs. Traditional and conservative rule sets sometimes exclude it entirely, treating it as a later addition to the hand set. If you are sitting down at a new table or joining an unfamiliar group, check before assuming it is in play.
The New 13-hand and New 18-hand sets, the most widely used in Hong Kong today, both include Seven Pairs. But local variation is common enough that the question is always worth asking. A quick “chat deoi sik m sik?” (is Seven Pairs allowed?) before the first deal saves confusion later.
Seven Pairs rewards players who stay disciplined during the draw phase and know when to pivot to a different hand if the pairs are not coming. At 4 faan base, it is well worth chasing when your starting tiles line up. Track your pairs, watch the discards carefully for dead tiles, and stay flexible enough to abandon the hand if the wall runs thin.
TileBuddy automatically recognizes Seven Pairs and calculates the correct faan, including the Full Flush bonus if your pairs all land in one suit. Download TileBuddy on the App Store and score every hand accurately at the table: https://apps.apple.com/us/app/tilebuddy/id6759950974