Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. If a green and a white cell are orthogonally adjazent then the green cell has the greater value.

Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. The arrows show where the successor of the digit in the cell is (within the box). The digit 9 has an arrow in direction to number 1.

Fill in the grid with the digits 1 to 9. Each row, column and 3x3-box will have exactly one of each digit. The clues along the egdes tell you in which cell you can find the maximum of the first three cells in the corresponding row or column.

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

Fill in the grid so that every row, every column, every 3x3 box and both diagonals contain the digits 1 through 9. Blue cells indicate the digit is lower than all it's orthogonally adjacent cells. Red cells are higher than all it's orthogonally adjacent cells. White cells indicate the digit is both higher and lower than it's orthogonally adjacents.

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.

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.

Fill the grid with the digits 1 to 9. Each row, column and 3x3-box has exactly one of each digit. The top of the pencil is one digit higher as the other digit of the pencil.

Fill in the grid so that every row, every column and every 3x3 box contains the digits 1 through 9. Numbers must be placed according to greater (>) and less (<) signs. The numbers between two cells give the difference of the digits.