WARNING
The Chain
A 4-minute game

You run the retail end of a 3-tier supply chain.

  • Keep stock steady and try to match customer demand.
  • One tap orders one unit — no need to over-order.
  • The first round is easy.

First time? Try the tutorial.

Tutorial complete

You kept up. The real game adds two more tiers between you and the factory.

  • In Round 1 the chain mirrors you.
  • In Round 2 it forecasts — and things will happen.
Time runs on its own from here. Each week ticks every 5 seconds — you have to act.
Week 1 5.0s
Supply chain stress
CALM
Inventory
12
Demand
this week
4
Tap once = 1 unit · arrives in 2 weeks
Round 1 postmortem
  • Cost£0
  • Peak stock0
  • Walked0
  • Collapses0
Round 2

The chain stops mirroring you and starts forecasting.

  • The factory will try to keep up with you.
  • Things will happen.
Result

The chain faced five different risk classes. Same orders amplified every one.

£0
Cost
0×
Whip
0%
Service
0
Overshoot
0
Ticks
Demand vs your orders vs factory
Customer demand Your orders Factory orders Factory ships

Demand panic. Route disruption. Supplier offline. Cargo loss. Factory throttle. Different problems, different mitigations — but the same chain to absorb them.

Bot harness mode

Calibration run.

Headless simulation. Open the browser console (Cmd+Opt+J) to see the distribution of cost, bullwhip ratio, and service level across runs.

Running…