Open or concealed.
Every discard is also a call decision. Most beginners call too often and open too easily. Learning when to stay concealed — and when opening is clearly worth it — is where intermediate play begins.
Every call is a trade. You get a tile immediately — but you give up information, faan, and flexibility. Stay concealed until the cost is clearly worth paying.
What a call costs
Every exposed set shows opponents your tiles and hand shape. They will stop throwing tiles that help you.
Common hand (平糊) is worth 1 faan only when fully concealed. One call and that bonus disappears — potentially dropping below the 3-faan floor.
Exposed sets are locked. You can't rearrange, pivot, or abandon the shape. You're stuck with the hand you committed to when you called.
Chow is restricted to the player on your right and loses to any pung or win claim on the same tile.
The concealed faan in practice
The call that felt like progress actually killed the hand.
When calling makes sense
Already at tenpai and the winning tile appears. Always call — the game is over, costs are irrelevant.
All Pungs (對對糊) has no concealed bonus. Calling pungs openly costs nothing in faan and gets you there faster.
A dragon pung (+1 faan) in a hand that doesn't rely on the concealed bonus is pure profit. Do the math before and after.
Under 50 tiles remaining and still 1-shanten? Speed beats score. Call if it puts you in tenpai now.
You hold two South Winds seated North in the East round — South Wind is neither your seat wind nor the round wind. An opponent discards one. Should you call?
The pung adds 0 bonus faan. It exposes your shape, locks the set, and kills the concealed bonus on any chow-based hand. The third South Wind will likely arrive from the wall anyway.
Every discard is public information — and most players ignore it. The key signals: tiles in the same 1-4-7, 2-5-8, or 3-6-9 group as a recent discard are relatively safe; a player who threw 4 wasn't building sequences that need 1 or 7. Track how many copies of a tile are visible — at 3 seen, only one copy remains in play.
Watch exposed sets closely. One exposure: note it. Two: their hand shape is becoming clear. Three: danger — any tile you throw is far more likely to complete their hand than yours. Break up your own hand before discarding into a third exposure. This habit separates winning players from losing ones.
Full coverage — the 1-4-7 grid, copy-count tracking, and suit pattern reading — is in Chapter 10: The discard river.
You're one tile from a small win. Should you take it or hold for a higher-faan upgrade? A steady stream of small wins beats chasing big hands and losing. Don't romanticize the limit hand.
- ▸Wall has ≤ 20 tiles remaining
- ▸The upgrade tile is dead (all 4 seen)
- ▸An opponent has 2+ exposures
- ▸The upgrade needs 2 or more specific tiles
- ▸Anyone shows a third exposure
- ▸Wall has > 20 tiles remaining
- ▸Upgrade needs only 1 specific tile
- ▸That tile has 2+ live copies
- ▸No opponent has more than 1 exposure
- ▸Holding doesn't force a dangerous discard
Run through these in order. Start with the first two — let the rest develop over a few games.
Does the new tile improve my hand? If yes, what do I drop?
If I drop tile X, does it match a recent discard or sit in a 1-4-7 group with one?
Has anyone exposed three sets? If so, only discard safe tiles.
What stage am I in — develop, attack, or defend?
Is a call worth making? Does it add more than it costs?
If I'm close to winning, is the upgrade realistic, or should I take what I have?
You don't have to apply all of this at once. The table itself becomes the teacher.