Sudoku Number puzzles tend to be created with a unique solution, there is no
reason why puzzles can not be produced with multiple solutions. Obviously,
if there are dozens or hundreds of solutions, the puzzles become pointless.
However, if there are only a few possible solutions, the puzzles can be
quite intellectually taxing. Have a look at the 2 puzzles below and see if
you can find ALL the solutions to each of them. The first has EXACTLY 2
solutions and the second EXACTLY 3 solutions.
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