Logic Masters Deutschland e.V.

"The 6 Sudokus of Christmas" by Stephen Parthimos (Stavros96)

WELCOME to the 12 Days of Christmas inside the 6 Sudokus of Christmas! Each grid represents 2 days of Christmas - beginning with “12 Cells Ratio-ing” all the way to a “Bulb in a Thermo Tree”. Set aside some time this holiday season to solve your way through this huge gift - made just for you!

Rules (out of grid):

• Difference: The difference between the first 2 digits in the corresponding direction
• Sandwich: Sum of the digits between 1 and 9 in the row
• Parity: Number of parity changes in the corresponding column
• X-sum: The sum of the first X numbers placed in the corresponding direction, where X is equal to the first number placed
• Outside-3: The digit must be placed in one of the first 3 cells in the corresponding direction
• Outside-2: The digit must be placed in one of the first 2 cells in the corresponding direction
• Skyscraper: Digit indicates how many skyscrapers can be seen from corresponding direction

Rules (in grid):

• Black dots: Ratio of 2:1 (no negative) // White dots: Consecutive digits (no negative)
• Killer cages: No repeating digits // Grey squares: Even digits
• Grey circles: Odd digits // Palindromes (green lines): Same digits from each end
• Quadruple circles: Digits in the circle must appear once in the cells around it // V clues: Sum to 5 (no negative)
• X clues: Sum to 10 (no negative) // Arrows: Digits on arrow sum to circle
• Thermos: Digits increase from bulb

(Clues outside the grids apply to both grids they touch)(Long diagonal lines in the image are cosmetic only - not part of the puzzle)

Penpa Link: Click Here