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.
You can play it by mouse only or key board only. Also you can choose a cell by mouse and insert a number by keyboard. Please enjoy as your favorite way.
Change the line width of the game grid here.
Insert a check-mark in "Tab" button, the design of number is changed.
Take off a check-mark in "Bar" button, "Number Bar" doesn't appear on the display. If you want to insert numbers by key-board, it's better to take off this check-mark.
Take off a check-mark in "Memo" button, you cannot put temporary numbers. Expert player has better to take off this check-mark.
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 keyboard
You had better to take off a check-mark in "Bar" button.
When the problem opens on the display, please click at any place.
You can insert a number in the light blue cell only. The light blue cell moves by arrow keys up and down, right and left.
When you insert a number, your number will write in the light blue cell. And when you insert other number in the same cell, it will be written on the last number.
When you want to delete your number, enter number "0" or push "Delete" key or "Back space" key.
When a check-mark is in "Memo" button, you can put a temporary number in the four-corners of cell by space-key + Number key.
When you put a number on a cell, temporary numbers disappear from display. But when you delete a number, temporary numbers appear again.
In zoom-up screen, you can scroll the part of board by arrow keys. And when the light-blue cell will approach to the end of screen, the part of board will move automatically.
Play using the mouse
When you want to play using mouse, please insert a check-mark of "Bar".
Choose a cell by clicking a mouse, "Number Bar" will appear. Click a number in the "Number Bar", your choosing number will appear in this cell. And when you click the other number, it will be written on the last number. When you want to delete a number in this cell, please click "Del" button in the "Number Bar".
When a check-mark is in the "Memo" button, you can see fan-shaped mark in the four corners of cell. Click on this mark, you can put a temporary number.
Choose a cell by clicking (the color of this cell will turn to light blue), and you can insert a number by key board.
You can check possible numbers by clicking hint when only one combination to make up a hint number and numbers of cells are between 2 and 7.
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.
How to use Try-mode
When you want to put a number temporarily for seeking the next step, use Try-mode.
With the Try-mode, you can solve problems just like in the regular solving-mode. But the first your action is indicated by brown color, and following your action is indicated by yellow color.
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 "Fix" button in Try-mode, if you want to fix your temporary numbers. The color of all your temporary numbers are changed to black and return back to solving-mode.
