Last Control
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A trail of scattered nodes, two parts. First the numbers run straight. Then the rule starts switching under your hand.
Twelve nodes are thrown across the terminal out of order. Part A is the clean line: connect them 1 → 2 → 3 to the end, as fast as your eye can find each one. Part B is the decoy: the rule alternates — 1 → A → 2 → B → 3 → C — and every turn forces you to switch the set you are hunting. The protocol times both passes and files the seconds the switch costs you. Free, in the browser, no sign-up.
No download. No account. Two passes of twelve nodes. The switch cost is filed in seconds.
Tap the nodes in ascending order: 1, 2, 3… The clock is already running. A wrong node is logged and the line does not advance.
The full audit runs in the game. Free. Anonymous until you claim a seat.
Frequently filed questions
Is this trail making test free?
Yes. Free, browser-playable, no sign-up, no download. Nothing is filed off this page unless you choose to continue into the game.
What is the Trail Making Test (TMT Part A and Part B)?
The Trail Making Test is a classic pen-and-paper neuropsychological task that dates to the US Army Individual Test of 1944 and was popularised by Ralph Reitan. In Part A you connect scattered targets in ascending order — 1 to 2 to 3 — as fast as you can. In Part B the rule alternates between two sets: number, letter, number, letter — 1 to A to 2 to B to 3 to C. Part A taxes visual search and sequencing; Part B adds the requirement to keep switching between the two sets. Here both parts run in the browser: a sequencing pass, then an alternating pass, each scored on time, with the gap between them reported as the switch cost.
What does Part B add that Part A doesn't?
Set-shifting. In Part A you hold one rule the whole way — count up. In Part B you must alternate between counting numbers and stepping through letters, switching the active set on every move. That switching is slower than running a single rule, and the difference between your Part B time and your Part A time is the switch cost. A small switch cost means you flipped between the two sets cheaply; a large one means each turn of the rule made you stop and re-find your place.
Is this a real cognitive or medical assessment?
No. It is a game. The rating is a game score for entertainment — it does not measure intelligence, diagnose anything, or stand in for any professional assessment.
What is Last Control?
A multiplayer browser game in which you run a base of workers under a protocol that audits everything — including you. The full 60-second cognitive audit at game.last-control.com is the entrance.