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: Pi
Divide the grid into nonoverlapping regions. Each region should contain exactly one circle. Any region containing a black circle should be a square. Any region containing a white circle should be a rectangle not a square. Regions of the same area can not share an edge (but can share a corner).
Grid control: To draw a cut click at the cell edge or move mouse along the line holding the button. You can also connect the centers of cells which belong to the same rectangle with auxiliary line. In this case cut lines will be added automatically. More details about grid control are at the help page.
Author: Anurag Sahay
Shade some empty cells black to create a single connected wall. No 2x2 square can be completely shaded. Numbers in a cell indicate the length of consecutive shaded blocks in the neighboring cells. If there is more than one number in a cell, then there must be at least one white (unshaded) cell between the black cell groups.
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.