Jigsaw Sudoku keeps the 9x9 grid and the digits 1 to 9, but replaces regular 3x3 boxes with irregular shaped regions. Every row, column, and region must still contain each digit once.
That one change is enough to make the puzzle feel new. Familiar box patterns disappear, and the region shapes become part of the logic.
Before placing anything, trace the region borders. A jigsaw region can snake across rows in ways that make normal Sudoku shortcuts unreliable.
Look for places where a region heavily overlaps a row or column. Those intersections often reveal hidden singles because several cells are blocked at once.
Experienced classic solvers sometimes move too quickly in Jigsaw Sudoku because their eyes expect square boxes. Slowing down to read the shape is the key skill. Once the region map clicks, the solve becomes a rewarding visual logic puzzle.