Draw a single continuous loop through every pearl. White pearls go straight, black pearls turn. Pure logic, no guessing.
You solved the Masyu puzzle!
Masyu is a loop-drawing logic puzzle created by Nikoli puzzles in Japan — the same company that popularized Sudoku worldwide. The puzzle is played on a grid containing black and white circle pearls. Your goal is to draw a single continuous loop that passes through every pearl while obeying specific rules for each pearl type. No guessing is required; every puzzle can be solved with pure deduction.
Place the loop by clicking or tapping on edges between adjacent cells. The loop must form one closed circuit with no branches or crossings. White pearls: the loop passes straight through but must turn in at least one adjacent cell. Black pearls: the loop turns 90° on the pearl and must go straight for at least one cell in both directions from the turn. Start with pearls near edges and corners — their constraints are tightest there.
White pearls require the loop to pass straight through without turning, but the loop must turn in at least one of the two cells immediately before or after the pearl. Black pearls require the loop to make a 90-degree turn on the pearl itself, and the loop must continue straight for at least one cell in both directions leaving the pearl.
No. A well-constructed Masyu puzzle can always be solved with pure logic. Start with the most constrained pearls — black pearls in corners or near edges — and work outward. Every puzzle generated on whatifs.fun is guaranteed to be solvable through logical deduction alone.
Puzzles are generated algorithmically each time you press play, so there are virtually unlimited unique Masyu puzzles. Every session produces a fresh, valid puzzle across all three difficulty tiers: Gentle (7×7), Tricky (10×10), and Devious (12×12).