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Day 7: Killer 7×7
Standard sudoku rules apply. Additionally the numbers in cages must sum to the number in the top left corner.
Day 8: Thermometer 6×6
Standard sudoku rules apply. Additionally all the numbers placed in cells in a thermometer must increase in value from the circle part of the thermometer to the other end.
Day 9: XV 7×7
Standard sudoku rules apply. Additionally the cells with an X must sum to 10 and cells with a V must sum to 5.
Day 10: Kropki 6×6
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.
Day 11: Thermometer 7×7
Standard sudoku rules apply. Additionally all the numbers placed in cells in a thermometer must increase in value from the circle part of the thermometer to the other end.
Day 12: 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.
Links to this years other sudoku advent posts:
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