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Logic Puzzles

Grid puzzles you solve by reasoning alone: draw loops, shade cells, place numbers and split regions. Every puzzle here was generated for AZTest and has exactly one solution. Pick a type, start with level 1, and your progress is saved in this browser.

Loops

Draw one closed loop through the grid.

Slitherlink One loop around the dots, guided by numbers. 50 levels Wolves & Sheep A Slitherlink loop that fences the sheep in and the wolves out. 34 levels Masyu A loop that must obey the black and white pearls. 40 levels

Shading

Decide which cells to fill in.

Nurikabe Islands of the right size in one connected sea. 83 levels Nonogram Shade the runs and a pattern appears. 54 levels Themed Nonogram Picture cross puzzles that reveal colorful pixel art. 42 levels Heyawake Shade rooms to meet the clues without walling in white cells. 100 levels Searchlights Place lights so every black number sees the right count. 42 levels Light Up Place light bulbs to illuminate every white cell without any two shining on each other. 50 levels

Numbers

Fill the grid with numbers.

Calcudoku A Latin square where every cage does its sum. 48 levels Skyscrapers Place the towers so the right number can be seen. 36 levels Sum Skyscrapers Skyscrapers where the clues add up the heights you can see. 36 levels Suguru Number each outlined region from 1 to N, keeping identical numbers apart. 100 levels Fillomino Divide the grid into blocks where every number matches the size of its block. 100 levels

Regions

Split the grid into pieces.

L-Pieces Cut the white cells into L-shapes. 50 levels

Paths & lines

Draw lines, bridges and routes.

Numberlink Connect pairs of matching numbers with non-crossing pastel lines. 54 levels Bridges Connect all numbered islands with straight bridges into one united network. 100 levels

Shapes & symbols

Place triangles, diagonals, beans and symbols.

Marupeke Place O and X in every white cell without lining up three of the same. 100 levels

How these puzzles work

Each type has its own short rules, shown beside the board. Tap or drag to play, use Hint when stuck, and Check to see whether anything you placed is wrong. Nothing is timed against you. Your moves and solved levels are kept by this browser; all we receive is how long each level took and how many hints it needed, without your name, so we can keep the levels in the right order.