Embedded Files
A Xmas Tree with 81 candles to light.
The symmetric tree consists of 17 Sudoku's of which 3 Asterisk, 1 Girandola and 7 SudokuX grids.
The 17th grid is an "Explosion" or Center-Dot vanilla/normal Sudoku, colored yellow, symbolizing the 81 candles.
The yellow cells however are not in the middle of other Sudoku boxes, because it would overlap too much with Asterisk of Girandola.
Overlapping areas are colored darker green
Best is to download the image and print it. The actual size of the image is 2021 x 1902 pixels
There is also the same Xmas tree with Pencil Marks to be viewed and downloaded here.
The puzzle should be EASY, because no additional methods are needed, except hidden or naked singles, but it appears not so easy. During the process and using no additional methods you end up in a situation where only 1 or 2 cells can be solved among more than 700 other empty cells. But which cells ? And that happens several times.
Then additional methods like naked/hidden subsets or Pointing Pairs etc come in handy.
Pretty moderate or even hard within such a large puzzle with 879 empty cells to solve. That's the challenge.
Happy solving. Have a nice Xmas and a prosperous and healthy 2019.
In code: Copy lines including first line and use PASTE button in SiSeSuSo#17//U6,A/O18/AA18/L30,X/AD30,X/U42,GX/I42,A/AG42,A/F54,x/O54/AA54/AJ54,x/U66,x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mport the puzzle into the Solver as follows:
Select the text lines including the 1st line, and pres CNTL+C to copy it into the Clipboard buffer.
In the Solver press "Paste" and the Sudoku's will be loaded in the Solver, both Excel and EXE.
Press the "Paint"button. Colors may vary, but can be adjusted in the sheet "Colors"
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