Day 13: Arrow 7×7
Standard sudoku rules apply. Additionally the digits along the arrow must sum to the number in the circle.
Day 14: Anti king 6×6
Standard sudoku rules apply. Additionally diagonally adjacent cells may not contain the same digit.
Day 15: XV 6×6
Standard sudoku rules apply. Additionally the cells with an X must sum to 10 and cells with a V must sum to 5.
Da7 16: Even/odd 6×6
Standard sudoku rules apply. Additionally a grey square must contain an even number and a grey circle must contain an odd number.
Day 17: Killer 6×6
Standard sudoku rules apply. Additionally the numbers in cages must sum to the number in the top left corner.
Day 18: Kropki 7×7
Standard sudoku rules apply. Additionally a black dot separates two digits with a 1:2 ratio. A white dot separates two digits with a difference of 1.
Links to this years other sudoku advent posts:
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