Dot Loop· Advanced

Goal

Connect dots with lines to form a single closed loop. The loop must pass through every circle.

How to Play

  • Tap or drag between two dots to draw a line
  • Tap an existing line again to erase it
  • Complete one closed loop to clear the puzzle!

● Black Circle = Must Turn

The loop MUST turn 90° at a black circle. Going straight through is not allowed!

OK
NG

○ White Circle = Must Go Straight

The loop MUST go straight through a white circle. Turning is not allowed!

OK
NG

Rules

  • The loop must be one continuous ring — no gaps or branches
  • Lines cannot cross each other
  • Dots without circles may or may not be part of the loop

Tip

  • Start with black circles — their turn direction is more constrained
  • Circles on edges and corners have fewer options, making them easier to solve
  • Mark impossible edges with X to narrow down possibilities

Loop puzzles train path planning and spatial reasoning simultaneously. Spatial cognition training promotes prefrontal and parietal cortex activation, contributing to improved visual-spatial working memory.

  • Spatial cognition training in 17,000 children (Nature Sci Reports, 2021)