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Difference Sudoku (802)
Other names:
Differences Sudoku
Instruction:
Number in a circle tells the difference between the two adjacent numbers
Reference:
WSC 2018
(121)
Parent puzzle:
Mathrax Sudoku
Child puzzles:
Difference 2 Neighbours Sudoku
One or Two Difference Pairs Sudoku
XY-Differences Sudoku
Related puzzles:
Greater or Difference Sudoku