Brain Arena💎--
Global Cognitive Sport

Link
Trail

A path-drawing puzzle where you connect matching BrainType character pairs with trails that never cross.

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Link Trail

Overview

Link Trail is a path puzzle where you connect matching BrainType character pairs scattered on the board. Trails run only horizontally and vertically, and can never cross other trails or obstacles. Erasing a confirmed trail to redraw it costs a +3s penalty. Higher levels add a focus gauge: going too long without a useful move erases your latest completed trail. You race to connect every pair, and higher levels bring bigger boards, more pairs, and more obstacles.

How to play

01

Connect the pairs

Drag from one character to its matching partner to draw a trail between them.

Lifting your finger midway erases the unfinished trail (no penalty)
02

Trail rules

Trails move only horizontally and vertically, and cannot pass through other trails, characters, or obstacles.

While dragging, move back one cell to shorten the trail
03

Black cells are obstacles

Cells with a black background are obstacles. Trails and characters cannot pass through them, so route around them.

Higher levels add more obstacles, so read the whole route before drawing
04

Redraw penalty

Tap a finished trail to erase and redraw it, but each erase adds +3s.

Plan the whole layout before drawing to save time
05

Focus gauge

At higher levels, going too long without a useful move erases your latest completed trail. If there is no trail to erase, it adds +2s as hesitation time.

Move a trail, connect a pair, or redraw to refill the gauge
06

Clear condition

Connect every pair to clear. Leftover empty cells are fine.

Higher levels bring bigger boards, more pairs, and more obstacles

Difficulty

99 stages total. Every 11 stages, the level increases.

LevelStagesGridPairsObstacles
11–114×4–5×52–40–2
212–225×5–6×64–62–3
323–336×6–7×76–73–4
434–447×77–84–5
545–557×7–8×88–95–6
656–668×8–9×99–106
767–779×9106–7
878–889×9107
989–999×9107–8

Abilities you'll build

Processing speed

Drawing the obvious connections quickly and cutting hesitation time trains processing speed.

Working memory

Holding the remaining pairs and the shape of free cells in mind while you draw trains working memory.

Reasoning

Planning a full set of non-crossing routes before you commit trains reasoning.

Self-control

Double-checking each route before drawing to avoid redraw penalties trains decision control.

Ability Balance

SPEED
10%
MEMORY
5%
LOGIC
60%
CONTROL
25%

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Related Guides & Topics

Read these next to connect the full picture of cognitive measurement and training.

Brain Training ExplainedWhat training changes, and how to make it meaningful.Cognitive Ability TestMeasure processing speed, working memory, attention, and control.Cognitive SportsA fair, nonverbal way to compete with your brain.Memory Test GuideCompare short memory tasks and choose where to start.
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