Rangoli Grid
Nonogram picture logic: read the number clues, fill runs of squares and reveal a rangoli pattern. Every grid can be solved without guessing.
Free logic puzzles to play online
Grid logic puzzles give you a board and a few rules, and ask you to find the one arrangement that fits them all. There is no luck and no guessing: every step follows from what you already know, which is what makes the last square so satisfying.
Start with a picture puzzle like Rangoli Grid, or try placement puzzles where objects must not touch. Each game has a how-to guide with a worked example, hints when you are stuck, and levels that grow from quick warm-ups to properly hard grids.
Mango Grove
One tree in every row, column and coloured orchard, and no two trees touching, even at a corner. A calm Star Battle style logic puzzle.
Chai & Coffee
Balance chai and coffee in every row and column, never three alike in a line, and follow the = and × signs. A calm binary logic puzzle.
Garden Fence
Draw one closed fence around the garden. Each number counts the fenced sides of its bed. Classic Slitherlink on grids from 5×5 to 8×8.
Rectangles
Split the grid into rectangles. Each one holds exactly one number, and that number is its area. Every puzzle has one answer you can reach by logic.
Lantern Garden
Light every square of a night garden. Lanterns shine along rows and columns until a wall stops them, and no two lanterns may face each other.
Pitch & Pine
Pitch one tent beside every pine. Tents never touch, even at the corners, and the numbers count the tents in each row and column.
Kakuro
Cross sums: fill each white run with digits that add up to its clue, with no digit repeated. Crossing runs narrow every cell down to one.
Map Painter
Colour an island with three paints so no two neighbouring regions match. Every map has exactly one answer, so each stroke is a deduction.
Lamp Flip
A light toggle puzzle: every tap flips a pattern of lamps. Turn off all the lights in as few taps as possible, from plus shapes to knight jumps.
Deep Sonar
Sweep the sea for mines by pure deduction. Every board can be solved without guessing, and the sonar shape changes as you go.
Domino Plots
Lay every domino from the tray so each coloured plot keeps its rule: a total, under or over a number, all the same, or all different.