Loop puzzles
Draw a single closed loop that never crosses or branches. The clues look different in each type: numbers count edges in Slitherlink, pearls dictate turns in Masyu and arrows count shaded cells in Yajilin, but the logic underneath is shared. Every corner of the loop has either zero or two lines, and that one fact drives most of the deductions.
All loop puzzles
What makes a loop puzzle
In every puzzle on this page the answer is one loop. Slitherlink draws it along the grid lines, with numbers that say how many sides of a cell the loop uses. Masyu and Yajilin draw it through the cell centres: Masyu clues are pearls that force a turn or a straight, and Yajilin clues are arrows that count the shaded cells the loop must avoid.
Two habits carry across all of them. Mark the edges you know are empty with a cross as eagerly as you draw the ones you know are used, and look at corners and borders first, because a loop has the fewest options where the grid runs out. Start with a 5×5 Slitherlink, then try Masyu, whose pearls give you long forced runs early.
FAQ
A 5×5 Slitherlink. Its 0 and 3 clues give immediate deductions, and the corner patterns you learn there apply to every loop puzzle. Masyu is the natural next step.
No. The loop is a single closed path that never crosses, branches or touches itself, and every vertex it visits has exactly two lines.
No. Every grid here is verified to have a single solution reachable by logic. If you are stuck, use Check to confirm what you have so far is consistent.