Top rating improvement of the month
Branko 265
Aleksey 232
Pi 192
rachelinator 178
Alexas 166
Top commenters of the month
O-le_o-le 65
ft 20
Adam Bissett 14
Иван Грищенко 3
GD 3

The puzzle below is a current daily puzzle. This puzzle is competitive - you have to register to solve it and participate in the daily 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 this 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

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Divide the diagram along the grid lines into regions of exactly 4 cells. A number in a cell indicates how many of the four edges of the cell are used by region borders (the border of the diagram is also count).

Example puzzle

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 cells which belong to the same part with auxiliary line. More details about grid control are at the help page.