Dumpling DashThe simple maths behind multiply and add gates
×2 or +15? A little arithmetic decides most gate choices. Here is the whole of it, with the details that generic tips leave out.
In this guide
A multiply gate (×N) is worth more than an add gate (+A) whenever the number of runners going through it is bigger than A ÷ (N − 1). So ×2 beats +15 once more than 15 go through, and ×3 beats +15 once more than 7 or 8 go through. In Dumpling Dash there are three extra details: a + gate pays out only once, a × gate keeps copying every dumpling that walks through it, and MEGA BAOs skip gates completely.
Every gate pair in a crowd runner is a small sum with a time limit. You see two numbers, you have a second or two, and you pick a side.
Crowd runner gate maths is simpler than it looks, but most tip lists stop at "multiply is usually better". That is often true, but not always, and knowing why makes the close calls easy. This guide walks through the maths step by step, using Dumpling Dash for the examples. If you want the broader strategy first, our gate tips cover steering, traps and timing.
The break-even rule in one line
Say your crowd has C runners. A ×N gate adds C × (N − 1) new runners. A +A gate adds exactly A.
The two are equal when C × (N − 1) = A. Rearrange it and you get the break-even crowd size:
break-even = A ÷ (N − 1)
- ×2 vs +A: N − 1 is 1, so the break-even is simply A. With more than 15 runners, ×2 beats +15.
- ×3 vs +A: N − 1 is 2, so the break-even is half of A. With more than 7 or 8 runners, ×3 beats +15.
A quick check with real numbers. With 10 runners, ×2 gives 20 and +15 gives 25, so add wins. With 40 runners, ×2 gives 80 and +15 gives 55, so multiply wins by a lot. Above the break-even, multiplying pulls ahead faster and faster.
That is why crowd runners feel the way they do. Early in a level, when the crowd is small, a big + gate can be the right call. Later, a ×2 almost always is.
What actually gets counted
Here is the part most guides skip. A gate does not look at the big number floating above your crowd. It works on each runner that physically walks through it.
In Dumpling Dash the gates behave like this:
- ×2 and ×3 gates copy every small dumpling that crosses them. Each one gets one or two new friends. The gate keeps doing this as long as dumplings run into it, so while you hold the screen and stay lined up, fresh dumplings from the steamer get multiplied too.
- + gates pay out once. The first dumpling to touch the gate brings the bonus, then the gate fades. Everyone after that gets nothing.
So the honest comparison is not "my crowd number × 2". It is "the dumplings that will go through the ×2 gate". If your crowd is spread out and only half of it reaches the multiplier, only that half doubles. This is the maths reason behind keeping your crowd tight: a tight crowd puts everybody through the good gate.
It also means a steady stream helps a multiplier keep paying, while a + gate gives the same amount whether one dumpling reaches it or fifty.
Why order matters: add first, then multiply
Imagine 10 dumplings, a +8 gate and a ×2 gate, one after the other.
- Add first: 10 + 8 = 18, then 18 × 2 = 36.
- Multiply first: 10 × 2 = 20, then 20 + 8 = 28.
Same two gates, different result. Whatever you add early gets multiplied by every multiplier that comes after it. A + gate near the start of a level is worth more than the same + gate near the end.
You cannot rearrange the gates in a level, but you can use this when a choice is close. If you are near the break-even and more gate pairs are still ahead, the + gate's bonus will be multiplied later. If it is the last pair before the fortress, take whichever gives the bigger number right now.
In Dumpling Dash every level has a power path: at least one side of each pair is blue, and the blue gates tend to switch between multiply and add as you go. So there is usually a + on the way to grow a small crowd and a × to cash it in.
Red gates: a fixed cost vs a share
Red gates have their own maths, and the two kinds are very different.
- A − gate has a fixed cost. A −6 gate removes six dumplings in total, then fades. If a big crowd goes through, the first few are lost and the rest pass untouched.
- A ½ gate takes a share. It squishes one of every two dumplings that walk through it, and it keeps working. In Dumpling Dash it shows up from level 4.
So the damage from a − gate is capped, and the damage from a ½ gate grows with your crowd. With 209 dumplings, clipping a −6 gate costs at most 6. Sending 60 of them through a ½ gate costs 30.
Every pair in Dumpling Dash has a blue side, so you never have to pick between two red gates. The maths matters when a wide crowd spills over: a little spill into a − gate is a small, fixed loss, while a spill into ½ is worth steering hard to avoid.
Two details that change the sums in Dumpling Dash
MEGA BAOs skip gates. Eight dumplings close together squish into a MEGA BAO, and a MEGA BAO walks through gates without being multiplied or hurt. Only your small dumplings are counted at a gate. If a third of your crowd value is sitting in MEGA BAOs, a ×2 gate doubles the other two thirds. Our MEGA BAO guide explains how merges work.
The counter tops out at 999. Once your crowd reaches 999, gates cannot make it any bigger, so a multiplier at that point adds nothing. That is a happy problem, but it is good to know when you are deciding whether a risky detour is worth it.
On bonus levels, like the dumpling rain level above, both gates in a pair are blue, so every choice is pure maths. With 94 dumplings, ×2 adds 94 and +13 adds 13. Easy.
A three-second routine for every gate pair
- Check the colours. If one side is red, go blue and spend the rest of your attention on steering.
- If both are blue, estimate how many will go through. Use the counter as a rough guide, but think about the part of the crowd that is lined up, not the whole number.
- Compare with the break-even. For ×2, is that more than the + number? For ×3, is it more than half of it?
- Close call? Look ahead. With more gates coming, lean toward the + gate. On the last pair, take the bigger number now.
- Line up early and hold still, so the whole stream goes through the gate you picked.
If you are new to the genre and want to know where these gates fit into the bigger picture, read what a crowd runner is first.
FAQ
Is a multiply gate always better than an add gate?
No. A ×2 gate only beats a +A gate when more than A runners go through it. With a small crowd, a big + gate is often the better choice, especially early in a level.
How do I work out the break-even quickly?
Divide the + number by the multiplier minus one. For ×2 the break-even is the + number itself; for ×3 it is half of the + number. If more runners than that will go through, multiply.
Does a ×2 gate double my whole crowd?
Only the runners that walk through it. In Dumpling Dash a ×2 or ×3 gate copies every small dumpling that crosses it, so a tight, steady stream gets the full benefit, while a spread-out crowd gets only part of it.
Why does the + gate fade after I touch it?
In Dumpling Dash a + gate pays out once, to the first dumpling that reaches it, and then fades. That is why it gives the same bonus whether one dumpling or your whole crowd arrives.
Which red gate is worse, minus or half?
For a big crowd, the ½ gate. A − gate removes a fixed number and then fades, while a ½ gate squishes one of every two dumplings that pass through it for as long as they keep coming.
Do MEGA BAOs get multiplied by gates?
No. MEGA BAOs walk through gates without being multiplied or hurt. Gates only work on your small dumplings.
