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.

Kuromasu

Author: Vladimir Portugalov

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Blacken some cells in the grid so that no two black cells have a common edge and all white cells are connected. Cells with a clue cannot be blackened. Clues indicate the total count of white cells connected vertically and horizontally to the numbered cell including the cell itself.

Example puzzle

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.

LITS+

Author: Andrey Bogdanov

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Shade some cells so that each region is either fully unshaded or contains exactly four shaded cells that form an L, I, T or S tetromino. Two tetrominoes of the same type shouldn't share an edge. All shaded cells should form a single connected area. No 2×2 group of cells can be entirely shaded or entirely unshaded.

Example puzzle

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.