hr-studioSearch · 04
A computational design primer · Search Strategies

Climbing, jumping, annealing.

You cannot see the whole landscape — you can only stand somewhere and probe. So how do you hunt a summit you can’t see? Three ancient instincts: climb whatever hill you’re on, jump somewhere new and hope, or the strangest and best idea — start reckless, cool down slowly, and let boldness itself be a schedule. Watch the wanderer above settle as its temperature falls.

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i.

The climber

Hill climbing is pure exploitation: from wherever you stand, take the step that improves, stop when nothing does. It’s fast, cheap, and honest — and it inherits the landscape’s cruelty. Its success rate is exactly the size of the summit’s basin: drop climbers at random here and only about a quarter of them are born lucky.

Tap to drop climbers; the tally tells the truth.

Success = being born in the right basin
ii.

The jumper

Random search is pure exploration: ignore the terrain, throw darts, keep the best. It can never be trapped — and never learns. Early darts improve fast; then the returns collapse, because blind luck must now beat its own best throw. Watch the best-so-far curve bend flat.

Throw darts and watch the diminishing returns.

Untrappable, unteachable
iii.

Climb from everywhere

Combine them and the arithmetic turns kind. One climb succeeds with probability p; R independent restarts fail only if every one fails — success becomes 1 − (1 − p)​R, racing toward certainty. Restart hill climbing is the unglamorous baseline that serious methods must beat.

Raise the restarts; watch predicted and actual agree.

Many cheap climbs beat one careful one
iv.

The annealer

Simulated annealing walks the landscape with a temperature: while hot it accepts even downhill moves, wandering across valleys it has no business crossing; as it cools, its standards rise until only improvement will do. Cool slowly and it anneals onto the summit; quench it and it freezes into whatever hill it happened to be on — exactly like the metal the name comes from.

Race a slow cool against a quench.

Courage on a schedule
v.

The tournament

Same landscape, same evaluation budget, three strategies racing live: the restart climber, the blind jumper, the annealer. Then change the terrain and watch the rankings betray them — on one smooth hill the climber is untouchable; on rugged ground it drowns in false peaks while the annealer keeps its head. There is no best strategy, only a best strategy for a landscape — the no-free-lunch truth every optimizer lives with.

Three hunters, one budget · change the ground and rankings flip
Climb and you inherit your birthplace; jump and you learn nothing; anneal and courage itself becomes a dial. Strategy is a bet about terrain — and the honest search places many small bets.