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Masyu

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Description

Masyu is a loop-drawing logic puzzle where a single, non-intersecting loop that passes through all circled cells is drawn.

Rules

The objective is to draw a single, non-intersecting loop, subject to the following rules:

  1. All circles must be passed through exactly once.
  2. At black cells the loop has a turn of 90°. The loop must also go straight through the cells immediately before and after on the path.
  3. At white cells the line travels straight through. The must turn in the cells immediately before and/or after on the path.

Example

A standard 10x10 masyu and its solution.

Masyu Example
Masyu Solution












Variants

Unless otherwise indicated, standard masyu rules apply to all variants.

Grey Cirles: In addition to black and white cirlces, grey circles appear which can act as either colour.

Regional: The grid is divided up into regions. The loop must turn an equal number of times in each region.

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