This one is x-sums. The clues outside the grid indicate the sum of the first X placed numbers in the corresponding direction.
So for example a clue of 6 could have X=2, in which case the second placed number would have to be 4. Or, it could have X=3, in which case the second and third placed numbers would have be to 1 and 2 in some order.
Enjoy!
#340 X-Sums Sudoku – rated easyAll puzzles © Tom Collyer 2009-17.
Nice and easy flowing utilizing the concept of maximum and minimum possible sums..4:31..
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