Here are the rules of the game:

- Place 1's and 0's in each row and column of the grid such that there are exactly six 0's and six 1's in each row and column

- The same digit cannot occur in more than two consecutive cells. Thus 000 is invalid, whilst 001 is fine

- A row cannot repeat in the grid, and neither can a column. For instance if one complete row contains 010101010101 then no other row in the column can contain exactly the same twelve-digit sequence. Similarly if a...

If you like traditional sudoku but are looking for a tougher challenge, then you'll love this collection of brand-new puzzles.

Here are the rules:

Place the numbers from 1 - 9 once in every row, column and bold-lined 3x3 box that compose the 11 overlapping grids in these massive puzzles.

These puzzles are printed on high quality paper with one samurai sudoku per page, making the puzzle-solving experience all the more enjoyable....