The movable wall concept
Every non-target robot can be converted into a stopper. Place it where no wall exists and create a custom turn point.
Treat helper placement as infrastructure. Build once, reuse multiple times in one route.
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2026-03-16 • 6 min read
Stopper Robot Techniques for Shorter Solutions
Helper robots are not distractions. They are movable walls that unlock angles impossible with static walls alone.
Two stopper patterns
Pattern A: side stopper for horizontal-to-vertical turn.
Pattern B: back stopper for exact distance control before final lane.
When to abandon a setup
If the setup requires three extra moves and saves one move later, it is likely inefficient. Reset quickly and test an alternative anchor.
Round Checklist
- Which helper robot can park closest with one move?
- Can one stopper serve both mid-route and final-route?
- Did setup cost exceed route savings?