What Is Joker Bait in Mahjong? A Strategy Guide
Joker bait means holding on to a pair you don't need, throwing one of the two out around the middle of the game, and taking the joker back if somebody calls it and uses a joker in the exposure.
You give away one tile you were never going to use. You get a joker. That's the trade, and it's one of the few moves in this game where the upside is large and the cost is close to nothing.
The takeaway: stop dumping your useless pairs in the early game. Split them up, hold one back, and throw the bait once the table has started calling tiles.
How does joker bait actually work?
Four steps, and the whole thing takes two turns.
One. You've committed to a direction, and you're sitting on a pair that has no home in it. Say you're building an odd-number hand and you've got two 4 craks. Normally you'd shed those early. Don't.
Two. Wait. Somewhere around the middle of the game, once people have settled into hands and started making exposures, is when the bait works.
Three. Discard one of the two. If somebody wants it, she calls it and lays a group face up on top of her rack. If she filled that group out with a joker, you're in business.
Four. On your next turn, pick from the wall, then hand her your second 4 crak and take the joker. The joker is yours, in your rack, for the rest of the hand.
Why does it work as often as it does?
Because of where jokers are legal.
A joker can stand in for a tile in any group of three or more, so pungs, kongs and quints are all fair game. Those groups are exactly what a player builds when she calls a discard, and she's allowed to fill the rest of the group with jokers as long as the tile she claimed is a real one.
So any time somebody calls your discard, there's a genuine chance a joker went down with it. Not a certainty. A real chance, every time, for free.
The second reason is that redemption is not optional for her. When you offer the matching natural tile, the exchange happens. She doesn't get to decline, keep the joker, or negotiate. That's the rule, and it's the same rule that will take a joker off your rack next week.
When should you throw the bait?
Mid game. Not turn three, and not when the wall is nearly gone.
Early on, people haven't picked a lane yet. Your 4 crak sails past four players who are still deciding, lands in the discards, and you've given away a tile for nothing.
Late, the opposite problem. Somebody may well call it, but there's not enough game left for the joker to help you, and you've handed a player who's close to winning the exact tile she needed.
The middle is where people have committed enough to want tiles but not so much that they're one away from mahjong. Watching the table for that moment is the same skill as reading discards, and it's the part that separates a bait from a donation.
What makes a good bait tile?
The tile somebody else clearly wants, that you clearly don't.
Winds and dragons are strong bait because they only fit a narrow set of hands, so the players who need them need them badly. Middle numbers work too, since they turn up in more shapes than the extremes.
The best signal is absence. If a tile hasn't shown up in the discards at all, somebody is probably holding them. That's your bait.
And a real one: don't bait with a tile that could be part of somebody's pair. You can't call a pair off the table, so a tile that finishes a pair for her is worthless as bait and dangerous as a gift, because pairs are the hardest part of any hand to fill. There's more on why in protect your pairs.
What are you actually risking?
Be honest about this, because it's a gamble, not a free lunch.
She might call it without a joker. Then you've handed her a completed group and gotten nothing. This is the most common outcome and it's the real cost of the play.
She might be closer than you thought. A tile that helps her more than it helps you is a bad trade at any point in the game, and the closer to the end you throw it, the worse it gets.
Your second tile might not come back to you as a joker. If she uses two natural tiles and one joker, and another player redeems that joker before your turn comes around, you're too late.
None of which makes it a bad play. It makes it a play with a price, and the price is one tile you didn't want. That's a bet worth taking most of the time.
Do you even need the joker?
Take it anyway.
A joker sitting in somebody's exposure is available to every player at the table who holds the matching tile. A joker in your rack is available to nobody. Pulling it off the table denies it to three opponents even if you never use it, and you can always discard it next turn.
There's one honest counterweight. Some hands pay double when you finish them with no jokers at all, so if you're deep in a jokerless run, a joker you don't need is dead weight against a bonus you were going to collect. That's a judgment call, and it comes up less often than the plain case.
Joker bait, in one list
- Keep an unneeded pair instead of dumping it early.
- Throw one of the two around the middle of the game.
- If somebody calls it and uses a joker, redeem it with your second tile.
- Pick from the wall before the exchange, or the hand is dead.
- She has to complete the exchange when you ask.
- Jokers are legal in groups of three or more, which is why exposures so often hold one.
- Good bait: winds, dragons, mid numbers, anything that hasn't been discarded yet.
- Bad bait: a tile that finishes somebody's pair.
- Too early and nobody calls it. Too late and you're feeding a winner.
- Take the joker even if you don't need it, unless you're chasing a jokerless bonus.
- It's a gamble. Sometimes she calls it with no joker and you got nothing.
Try it once this week
Next game, when you find yourself holding two of something that fits nowhere, don't throw them both away on turn two.
Split them. Hold one back. Wait until the second or third wall and put one out there. Then watch what happens, because either way you learn something about what the table is collecting.
That one habit is most of what joker bait is. The rest is patience, and patience in this game is mostly just resisting the urge to tidy up your rack.
If you want to run the setup a few times without holding anybody up, that's what Sharp Sparrow is for.