Start with the pre-filled cells - they often provide key hints for surrounding spaces.
If two same-colored circles are side by side, the next one must be the opposite color.
Each row and column must have the same number of black and white circles - a helpful guide for elimination.
No two rows or columns can be identical. Regularly compare them to avoid duplicates.
Solve methodically and mark possible options when unsure - this helps build towards the solution gradually.
More games
In Hashi, you connect numbered islands with bridges to form a single network - no crossings allowed, with the correct number and a maximum of two bridges per connection.
Play now
In LITS, you place tetromino shapes in marked regions, avoiding touching identical pieces and 2×2 blocks – all filled cells must form one connected area.
Play now
In Star Battle, you place stars on a grid so that each row, column, and marked region contains exactly a set number of stars — with none touching, even diagonally.
Play now
In Heyawake, fill cells black or white, follow region numbers, connectivity, and restrictions to logically solve the puzzle step by step.
Play now
In the Thermometer Puzzle, you logically fill cells so that the number per row and column matches the given clues.
Play now
In Nonograms, you fill in grid cells based on numerical clues to logically reveal a hidden picture step by step.
Play now