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Rules of 'Sum Frame Sudoku'

Place numbers in the grid such that each row, column and 3x3 box contain the numbers 1 to 9. Numbers in the outside frame equal the sum of the first three numbers in the corresponding row or column in the given direction.

EXAMPLE:


UNIQUE SOLUTION:

4 comments:

Rohan Rao said...

This is one of the most interesting variations of sudoku.

I enjoy solving these as they really test our logic skills.

Anonymous said...

I like them too, but I saw a little error on the first puzzle while solving it : the sum "12" concerning the region 9, line 7, should be an "11".

Nice and interesting blog !

Rohan Rao said...

Thanks a lot Ours Brun.

Error corrected :)

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