Odd/Even Sudoku (9 Draw TicTacToe Games)
(Published on 13. March 2021, 12:01 by tsc)
Standard Sudoku X rules apply. The digits 1-9 may appear only once in every row, column, box, and on the diagonals
❶ TicTacToe rules: Every of the nine boxes contain a TicTacToe game. Odd digits indicate one player and even digits the other. All nine games must be a draw. Therefore in every box there must not be three consecutive even or odd digits in any row, column or diagonal
❷ Little Killer: Digits outside the grid along indicated diagonals sum to the given total. An "E" indicates an even sum, an "O" an odd sum
Solution code: Row 5 (left to right) followed by column 6 (top down)
Comments
on 1. September 2022, 04:40 by dumediat
This is a really cool concept! I really enjoyed how each of the constraints played off of one another throughout the solve, and I usually could see where the puzzle was leading me next and which clues to focus on. The last step was a nice touch too. Excellent puzzle overall!
on 14. March 2021, 00:03 by JeremyDover
I did get the original. I did end up bifurcating at one point (placement of 7s and 9s in the top squares), but I loved the need to strongly use the tic-tac-toe condition. This was a great puzzle!
[@JeremyDover] Thanks! There is no bifurcation needed. Please find the following state in the solving path which disambiguates 7-9:
[SPOILER] https://f-puzzles.com/?id=ye3fkbf6
on 13. March 2021, 21:06 by tsc
Changed the puzzle because it got zero solves: 1) Difficulty from easy to average and 2) Some little killer clues changed to "E" and "O".
Hope it is more appealing now.
