Puzzle 1
(12 points)

There are two sudoku puzzles(1-6). Except grey cells, all remaining cells which are same positioned in both diagrams must contain different digits from each other. Also same positioned grey cells must contain same digits.

Puzzle 2
(18 points)

I suppose that, this is Classic Sudoku.

Puzzle 3
(10 points)

I have no idea, only know 6x6 (1-6) sudoku.

Puzzle 4
(12 points)

Classic Sudoku rules, 6x6 (1-6). Digits outside the grid show first digit in corresponding direction.

Puzzle 5
(14 points)

Classic Sudoku rules, 6x6(1-6), its form is half domino construction. And some segments have already filled in.

Puzzle 6
(13 points)

Every row, column and outlined regions contain exactly ones 1-7

Puzzle 7
(15 points)

Every row and column contain 1-N(for example 1-4). In the grid there are some empty cells(for the example every row and column has 2 empty cells). I suppose that dimension of the puzzle in competition will be 1-5, so grid will be dimension 7x7.

Puzzle 8
(16 points)/Digital Sudoku

Fill in the square with digits from 1 to 6 so that in each row, in each column, and in each 2x3 block all six digits are different. Digits are in digital form and some segments have already been filled in.

Puzzle 9
(17 points)/Skyscrapers Sudoku

Fill the grid with the digits 1 to 6. The digits represent the height of the skyscraper in each cell. Each row, column and 2x3-box has exactly one of each digit. The clues along the edges tell you how many skyscrapers you can see from that vantage point.

Puzzle 10
(17 points)

Fill the grid with the digits 1 to 9. Each row, column and 2x3-box has exactly one of each digit.

Addition to Classic sudoku this variant has some circles. You can easily recognize its possible to get 1-9 Sudoku considering with circles. But circles must have another function that i havent understand yet. If you look at the example you will see, for instance from the left second column, top to bottom fifth cell in the same column. The cell contain a circle. And when you start to solve the example two numbers can be placed in the cell: 9-8. When you check answer of example circle has number 8. I didnt figure out why not 9?

Puzzle 11
(18 points)

Classic Sudoku rules, 1-8. There are four different symbol outside the grid. Each symbol represent some digit series and each symbol outside the grid show possibility of first two cells in the corresponding direction.

First symbol(seems like human

) mean: 5,6,7,8

Second symbol: 1,2,3,4

Third symbol: odd number(1,3,5,7)

Last symbol: even number(2,4,6,8)

Puzzle 12
(19 points)/Irregular Sudoku

This is irregular sudoku, but when you star to solve you draw lines of regions. Every row column and outlined region contain exactly ones 1-7

Puzzle 13
(19 points)/Greater Less Sudoku

Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. Numbers must be placed according to greater (>) and less (<) signs.

Puzzle 14
(20 points)/Arrow Sudoku with multiplication

Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. The numbers in a capsule multiplication of the digits which are marked with arrows. Numbers in a capsule read from left to right or top to bottom.

Puzzle 15
(21 points)/Kropki Sudoku

Fill the grid with the digits 1 to 9. Each row, column and 3x3-box has exactly one of each digit. If the difference between two cells is 1 then there is a white dot. If digit in a cell is the half from a neighboring cell then there is a black dot. The dot between two cells with 1 and 2 can have any of these two colors.