Fill in the empty cells, one number in each, so that each column, row, and region contains the numbers 1 through 9 exactly once.
If the difference between two cells is 1, they are separated by a white dot. If a number is half of the neighboring number, they are separated by a black dot.
Place one ship of 4 squares, two ships of 3 squares, three ships of 2 squares, and four ships of 1 square in the grid, arranged horizontally or vertically.
The goal of Clouds is to mark certain cells as belonging to a cloud. Clouds mark an area of rectangular shape with a width and height of at least two cells.
Place circles into empty cells. All circles must form an orthogonally continuous area. A line of connected circles may not contain more than 3 circles.
Fill the grid with numbers 1 to 9 so that each horizontal or vertical run of squares adds up to the clue printed to the left of or above the run.
Enter numbers from 1 to 9 in each column and each row. In addition, inequality constraints indicate that one cell must be higher or lower than its neighbour.
Fill in each cell with one of three figures: circles, squares or triangles. Each region must contain either all identical or all different figures.