Gomoku Sudoku
(Published on 3. September 2026, 11:54 by Kutsumi Hane)
Rules:
Here is a Gomoku endgame after move 38, with the black and white circles representing the stones. You will play as Black ● and have to form an Open Four — four consecutive stones of the same color with both ends open — on move 43 to secure a win. White ○ always plays optimally.
After that:
After that:
Normal Sudoku rules apply: each row, column, and 3×3 box contains the digits 1-9 exactly once. Additionally:
-
·Odd:
Black circles ● contain odd digits.
·Counting Circles: Each digit in a white circle ○ indicates the number of times that digit occurs among all white circles.
·Anti-V: No two orthogonally adjacent cells may contain digits that sum to 5.
·The last Black stone ● played on move 43 is 9, and the White stone ○ closest to it is digit 1.
Here you can solve the puzzle online: Solve on SudokuPad
The difficulty is probably 4 stars. I wish you joyful solving!
Hint:
| · | What happens if the Counting Circles contain all four even digits? |
| · | In which rows can the 2s in Counting Circles be placed? |
Solution code: Row 3
Solved by bansalsaab, kangaroo
Comments
on 3. September 2026, 19:28 by bansalsaab
That was beautiful. I stared at it for a long time because I forgot the last rule but after that it was smooth.
