The puzzles below are current daily and contest puzzles. These puzzles are competitive and you have to register to solve them and participate in the competition. To register click Login link in the top right corner.
You can use the scores page to see the results of other competitors for the daily puzzle.
All the puzzles from the previous days are available at our archive page. Puzzles which are older than 5 days do not affect the score table and can be attempted without registration.
Author: Andrey Bogdanov
Place the given fleet of ships into the grid so that no two ships are in adjacent squares, not even diagonally. Numbers outside show the number of cells occupied by the ships in the corresponding row or column.
Grid control: Click the mouse button at the selected cell to change the color of the cell. Second click will paint the cell into auxiliary grey color, which doesn't affect correctness of the solution, but helps visually. You can also drag the content of one cell to another with the mouse. You can also click at the ship in the given set to mark them out. More details about grid control are at the help page.
Author: Anurag Sahay
Shade exactly four connected cells in each outlined region. All shaded cells should form a single connected area without 2×2 groups of cells entirely shaded black. Shaded cells in each outlined region form a tetromino (L, I, T, or S) and two tetrominoes of the same type shouldn't share an edge.
Grid control: Click the mouse button at the selected cell to change the color of the cell. Second click will put auxiliary cross sign, which doesn't affect correctness of the solution, but helps visually. You can also drag the content of one cell to another with the mouse. More details about grid control are at the help page.