Weekly Masyu
A 15×15 Hard Masyu that stays up all week. Take your time — your progress saves automatically, so you can solve it across several sittings.
Masyu hard
How to approach the weekly puzzle
Hard puzzles need short what-if chains once the direct patterns run out. Clear every forced move around the pearls first, mark ✕ generously, then test edges next to loose ends. Our guide to what-if chains explains the method.
Want something smaller? Play the Daily Masyu or browse all 15×15 puzzles.