Tips on tetta

1. Basic Knowledge

   Since both move and complete rules are based on columns and rows, which are different with N-puzzle, therefore there is no concept of neighbor cells or border, and the roles of columns or rows are interchangeable. The two points must be memorized when playing tetta.

2. Interchange Cells in the Same Column or Row

   Because only cells in the same column or row of the black cell can be swapped with it according to tetta's rules, therefore we can place the latter as a temporary storage for cells in the same column or row of the cells we want to interchange, and it is the most basic tip to interchange the other cells with it.

   interchange 2 cells in the same row

   Image 1 The original square	Image 2 Select a cell stored temporarily	Image 3 Swap it with the black cell	Image 4 Select a cell
   Image 5 Swap it with the black cell	Image 6 Select the cell stored temporarily	Image 7 Swap it with the black cell	Image 8 Complete

   interchange 3 cells in the same row

   Image 1 The original square	Image 2 Select a cell stored temporarily	Image 3 Swap it with the black cell	Image 4 Select a cell
   Image 5 Swap it with the black cell	Image 6 Select a cell	Image 7 Swap it with the black cell	Image 8 Select the cell stored temporarily
   Image 9 Swap it with the black cell	Image 10 Complete

   place the black cell as a temporary storage for cells in the same column of the cells we want to interchange

   Image 1 The original square	Image 2 Select a cell	Image 3 Swap it with the black cell	Image 4 Select a cell not interchanged
   Image 5 Swap it with the black cell as a temporary storage	Image 6 Select a cell	Image 7 Swap it with the black cell	Image 8 Select a cell
   Image 9 Swap it with the black cell	Image 10 Select a cell	Image 11 Swap it with the black cell	Image 12 Select a cell
   Image 13 Swap it with the black cell	Image 14 Select the cell not interchanged	Image 15 Swap it with the black cell	Image 16 Select a cell
   Image 17 Swap it with the black cell	Image 18 Complete

3. Rotate

   Rotation is the method by which we move the cells we want to interchange lying in more than 2 columns and more than 2 rows. Because there is no concept of neighbor cells in tetta, therefore rotation is unnecessary clockwise or counterclockwise, we must pay attention to it.

   rotate 2*2 cells

   Image 1 The original square	Image 2 Select a cell	Image 3 Swap it with the black cell	Image 4 Select a cell
   Image 5 Swap it with the black cell	Image 6 Select a cell	Image 7 Swap it with the black cell	Image 8 Select a cell
   Image 9 Swap it with the black cell	Image 10 Complete

   rotate 2*3 cells

   Image 1 The original square	Image 2 Select a cell	Image 3 Swap it with the black cell	Image 4 Select a cell
   Image 5 Swap it with the black cell	Image 6 Select a cell	Image 7 Swap it with the black cell	Image 8 Select a cell
   Image 9 Swap it with the black cell	Image 10 Select a cell	Image 11 Swap it with the black cell	Image 12 Select a cell
   Image 13 Swap it with the black cell	Image 14 Select a cell	Image 15 Swap it with the black cell	Image 16 Select a cell
   Image 17 Swap it with the black cell	Image 18 Complete

4. Complete a Column or Row

   You can complete a column or row by the above two basic tips. This tip is applied to rule 1 and rule 2.

   complete a row

   Image 1 The original square	Image 2 Select a cell	Image 3 Swap it with the black cell
   Image 4 Select a cell	Image 5 Swap it with the black cell	Image 6 Select a cell
   Image 7 Swap it with the black cell	Image 8 Select a cell	Image 9 Swap it with the black cell
   Image 10 Select a cell	Image 11 Swap it with the black cell	Image 12 Select a cell
   Image 13 Swap it with the black cell	Image 14 Select a cell	Image 15 Swap it with the black cell
   Image 16 Select a cell	Image 17 Swap it with the black cell	Image 18 Select a cell
   Image 19 Swap it with the black cell	Image 20 Select a cell	Image 21 Swap it with the black cell
   Image 22 Select a cell	Image 23 Swap it with the black cell	Image 24 Select a cell
   Image 25 Swap it with the black cell	Image 26 Complete

5. Complete a Square

   Because completed permutations of tetta are not unique, it should take very much calculation to complete a certain permutation with minimum moves. At first, you should practice squares of order 3 or 4 and then increase the order gradually. However, if you want to kill time only and complete it very soon, it will be a simpler way to move under a certain formula. Since tetta is still a new game, the best formula has not yet been found. We provide a simple formula for player's reference in the following. If you have a better formula, we hope you provide it to us. We will share it with other players in the next version.

   Arrange column by column or row by row. A similiar method may be applied to rule 2, only "assimiliated with the other columns" is replaced with "dissimiliated with the other columns".

   Image 1 Square from the start	Image 2 Arrange the pink triangles into a column	Image 3 Arrange the green triangles and the black cell into a column
   Image 4 With the black cell, interchange the column of green triangles such that the rectangles' colors are assimiliated with the other column	Image 5 Move the last green triangle to the column	Image 6 Arrange the red triangles and the black cell into a column
   Image 7 With the black cell, interchange the column of red triangles such that the rectangles' colors are assimiliated with the other columns	Image 8 Move the last red triangle to the column	Image 9 Arrange the blue triangles and the black cell into a column
   Image 10 With the black cell, interchange the column of blue triangles such that the rectangles' colors are assimiliated with the other columns	Image 11 Move the last blue triangle to the column	Image 12 Only two coulumns remained, start to arrange green rectangles into a row
   Image 13 Arrange yellow rectangles into a row	Image 14 Arrange blue rectangles into a row	Image 15 3*2 = 6 cells (marked white) remained
   Image 16 Swap these 6 cells and complete

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