This shows the screen when you start a problem. The bottom-right timer starts when you open the problem.
This is the solving mode so you can start right away.
Generally use the left mouse button. Using the keyboard with the mouse makes operation smoother.
Change the line width of the game grid here.
This changes the mark in the cells that do not become black.
Your settings for these buttons will be saved to preserve your playing environment.
On some computer systems the settings may not be saved.
You can enlarge and move the game board with these buttons.
Play using the mouse
Clicking with the left mouse button paints a cell black.
Clicking on a black cell, will change it to a "dot".
Clicking on a "dot", the "dot" disappears and the cell returns to empty.
Clicking with the left mouse button changes a cell like to the left.
Paint cells continuously by dragging (move the mouse pressing the left button). Click on a black cell and drag, and you can put "dots" continuously. Click on a "dot" and drag to delete black cells and "dots."
When you want to start a puzzle again click the "Clear" button. The timer does not return to zero though. To reset the timer you have to close the problem and open it again.
The members page counts the number of times you open a puzzle.
When you want to redo a step, click the "Undo" button. By clicking this button repeatedly you can return to the start.
After solving a problem, click the "Check" button. If your solution is correct the screen will say "Congratulations." If your solution is not correct it will indicate one point that is not correct, click the "Continue" button to continue to solve this puzzle.
Using the keyboard with the mouse
When you click the left button of the mouse pressing the "Shift key", black cells and "dots" change in the opposite order.
You can also drag pressing the Shift-key. That way you can put "dots" continuously, this is very convenient.
How to use Try-mode
When you want to paint a cell or put a "dot" temporarily thinking about the next step, use Try-mode. Click the "Try" button and the screen changes to Try-mode.
With the Try-mode, you can solve problems just like in the regular solving-mode. Your first action is indicated as brown and the following yellow.
Click the "Delete" button in the Try-mode, if you want to delete your trial actions. All your trial actions disappear and the point of your first action is indicated by a yellow blinking dot.
Click the "Fix" button in Try-mode if you want to set (make permanent) your trial actions. The color of all your trial actions are changed to black and you return to the solving-mode.