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.
Your settings for these buttons will be saved to preserve your playing environment.
On some computer system 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 the black cell, you can put the mark of "dot".
Clicking on the "dot", the mark disappear and return to empty cell.
Clicking the left mouse button changes a cell like shown here, to the left.
Click on a blank cell and drag (move a mouse with pushing the left button), you can paint cells continually. Click on a black cell and drag, you can put the mark of "dot" continually but black cells are not change to "dot". Click on the mark of "dot" and drag , you can delete black cells and "dot".
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 "Congratulation." 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 click the left button of mouse with pushing "Shift key" of keyboard, black cell and "dot" change by contrary order as usual.
You can also drag with pushing Shift-key. When you want to put "dot" continually, this way is very convenient.
How to use Try-mode
When you want to paint a cell or put "dot" temporarily for seeking the next step, use Try-mode. Click "Try" button, screen changes to try-mode.
With the Try-mode, you can solve problems just like in the regular solving-mode.
Click "Delete" button in Try-mode, if you want to delete your temporary numbers. All your temporary numbers are disappeared and the point of your first action is indicated by yellow color square.
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.
