In this category you can find the puzzles, which are also in the Puzzle Portal of the Logic Masters Germany.

Change some digits in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9 and so that no pair of changed digits is horizontal or vertical adjazent (diagonally adjazent changed cells are allowed).

Fill the grid with numbers 1 through 9. In no row, column and none of the drawn diagonals is reapeated any number.

Smaller Example:

Puzzle:

Every bold outlined section must contain the consecutive integers from 1 to the quantity of cells in that section inclusive. Adjazent cells have different numbers.

Puzzle:

The diagram contains small gardens. This are rectangular green areas separated by hedges. Every garden consist of the number of squares that the given numbers show. Every garden contains exactly one number. The small gardens may only touch each other at the vertexes. Each 2x2 square must have at least one garden square.

Example:

Puzzle:

Put the numbers 1 through 7 into the hexagonal cells so that every line (of any length) and every zone of 7 cells marked by the rings contains every digit not more than once.

Example:

Puzzle:

Fill in the grid so that every row, 9-cell-diagonal, and 3x3 box contains the digits 1 through 9. In the shorter diagonals all digits must be different.

Puzzle:

Put the numbers 1 through 7 into the hexagonal cells so that every line (of any length) contains every number not more than once. The difference between adjazent cells is never 1.

Put the numbers 1 through t into the circles so that every line (of any length) contains every number not more than once.

The numbers in the small triangles are the sum of the circles on the corners of the triangles.

Smaller example:

Puzzle:

Fill in the grids so that every row, every column and 3x3 box contains the digits 1 through 9. There must be a one-to-one correspondence between both twins, i. e., in all positions with a certain digit in the first grid must be in the corresponding position in the second grid also always the same digit (possibly another as in the first grid).