SudokuEdit
Editor of Sudoku for iOS

Tutorial 3

Creating Well Designed Sudoku


Figure 1.
In this tutorial, we start from designing Givens and Given Lock (see Controls section of Features page) button is useful for it. This figure shows a designed Givens and we start from here.

Figure 2.
1 is put for Answer at red-marked cell and we must fix the cell using other cells. Two Given 1s are set at green-marked cells and with two Blank Givens (blue-marked) the red-marked cell is fixed.

Figure 3.
Another Answer 1 (red-marked) is set and fix by one new Given 1 (green-marked) and one existing Given 1 (gray-marked) and two Blank Givens (blue-marked) .

Figure 4.
All 1s and 2s are fixed by same work. It is easy than you thought, isn't it?

Figure 5.
Some 3s are fixed and Auto mode of Note menu is turned on. The red-marked cells show the consistency already being lost. We have failed to creating! Now we should go back Figure 1 and restart creating.

Figure 6.
We newly fixed all 1-2s and some 3s from Figure 1. And we have come to a deadlock to fix other 3s.

Figure 7.
This shows the deadlock. Two 3s must be set at one of red-marked cells and one of blue-marked cells but there is no cells being able to use to fix them. We can escape from this deadlock to set 3 to one of the four marked cells ant set the attribute of it to Given but it breaks the design of Givens.

Figure 8.
The good way to escape from the deadlock keeping the design is using another number. This figure shows red-marked 4 is fixed by green-marked cells and the one of two red-marked cells for 3 in Figure 6 is eliminated.

Figure 9.
Turning Auto mode of Note on shows the two 3s are fixed by Figure 7. And another Green Notes are appeared.

Figure 10.
This figure shows after fixed all Red Notes and Green Notes of Figure 8 and fixed all following appeared colored notes and selected View By Number of Note menu. All 1-4s are fixed.

Figure 11.
We set and fixed 5s and 6s then turn Auto mode of Note on. Some Green Notes are appeared.

Figure 12.
We take two Green Notes of red-marked cells and set the value to 7 and 8. Four Red Notes are appeared.

Figure 13.
This figure shows after fixed all the Red Notes and following appeared Red Notes. Some Green Notes are appeared.

Figure 14.
It is good idea for fixing Answers first and leaving Givens because Given is easier to fix than Answer. So we take two Green Notes of red-marked Answer cells and fix their values to both 8. Then Red Notes are appeared.

Figure 15.
By fixing the two Red Notes, another Red Notes are appeared.

Figure 16.
We fixed all the Red Notes.

Figure 17.
We set red-marked Given to 7. Some Red Notes are appeared and we fix them and following appear ones.

Figure 18.
Now we have fixed all cells!

Figure 19.
The result of Check Given's Consistency of Edit menu is OK!

Figure 20.
We select Clear Cells of Edit menu and select Answers. This is our first designed Sudoku!