Fill in the grid so that every row, every column, and every marked region contains the digits 1 through 9. All the numbers in 3x3 boxes of the same color are exactly the same in position.

Fill in the grid so that every row, every column, and every 2 x 3 box contains the digits 1 through 6. The digits in the green cells as well as the digits in the green cells must be equal.

Fill in the grid so that every row, every column, and every 3x3 box contains the letters A, C, D, E, H, I, M, R, and T. If your sudoku is solved you can find in the colored cells a sentence by Isaac Babel (in german language).

Fill in the grid so that every row, every column, and every 3x3 box contains the letters A, B, E, G, L, N, R, T, and U. If your sudoku is solved you can find in the colored cells a small town in Thuringia (Germany).

Fill in the grid so that every row, every column, every 4 x 4 box, the green, the orange and the blue fields contain the digits 1 through 9.

Fill in the grid so that every row, every column of the 7x7 grid completed with both adjacent border fields contain the digits 1 through 9.

Place the given pieces into the grid without overlapping them. Then fill in the grid so that every column, and every 3x3 box contains the digits 1 through 9.

The four corner boxes of the finalized grid have been marked with dots on the pieces too.

Fill the grid with the digits 1 to 9. Each row, column and 3x3-box has exactly one of each digit. The strips in the left and in the top mark the distance and order of the two digits of this strip in this row or column.

Locate the position of a submarine fleet in the grid. Each submarine needs one square in the grid. The number of submarines is not known The numbers beside the grid indicate the number of cells occupied by submarines in each row, while the numbers below the grid indicate the number of occupied cells in each column. Submarines may touch the edge of the board, but cannot touch each other, not even diagonally. Blue cells are known to be water.

Example:

Puzzle:

Locate the position of a submarine fleet in the grid. Each submarine needs one square in the grid. The number of submarines is not known The numbers beside the grid indicate the number of cells occupied by submarines in each row, while the numbers below the grid indicate the number of occupied cells in each column. Submarines may touch the edge of the board, but cannot touch each other, not even diagonally. Blue cells are known to be water.

Example:

Puzzle: