Four Corners
(Published on 15. August 2026, 18:28 by sanabas)
You can attempt this puzzle at this sudokupad link
Good Luck!
Questions, comments, feedback are always welcome, either here or on the CTC community discord.
The rules:
Normal sudoku rules DO NOT apply.
Normal Schrodinger Sudoku rules apply. Fill the grid with the digits 0-9 such that no digit repeats in a row, column, or box.
S-cells: In each row, column, and box there is exactly one S-cell. S-cells contain two digits instead of one, and their value for the purpose of other clues is the sum of those digits.
Doublers: One cell in each row, column and box is a doubler. For the purpose of other clues, the cell's value is double the digit (or digits) in the box. Each digit from 0-9 appears exactly once in a doubler cell.
Region sum lines: On blue lines, the sum of values on the line is equal in each region the line appears in. Different lines may have different sums.
Killer cages: Digits do not repeat in cages (though values may repeat) and values sum to the total in the top left corner of each cage.
Kropki: Values in cells separated by a black dot have a 2:1 ratio. Not all dots are necessarily given.
Some of my previous puzzles:
Give it the Finger
Xban
Chaos Dancing
If you enjoy this one, please try them too.
Good Luck!
Questions, comments, feedback are always welcome, either here or on the CTC community discord.
The rules:
Normal sudoku rules DO NOT apply.
Normal Schrodinger Sudoku rules apply. Fill the grid with the digits 0-9 such that no digit repeats in a row, column, or box.
S-cells: In each row, column, and box there is exactly one S-cell. S-cells contain two digits instead of one, and their value for the purpose of other clues is the sum of those digits.
Doublers: One cell in each row, column and box is a doubler. For the purpose of other clues, the cell's value is double the digit (or digits) in the box. Each digit from 0-9 appears exactly once in a doubler cell.
Region sum lines: On blue lines, the sum of values on the line is equal in each region the line appears in. Different lines may have different sums.
Killer cages: Digits do not repeat in cages (though values may repeat) and values sum to the total in the top left corner of each cage.
Kropki: Values in cells separated by a black dot have a 2:1 ratio. Not all dots are necessarily given.
Some of my previous puzzles:
Give it the Finger
Xban
Chaos Dancing
If you enjoy this one, please try them too.
Solution code: Row 2's values, left to right
Last changed on on 15. August 2026, 23:09
Solved by Jooshy, claymategirl, amirs, blueberrypug, Snookerfan, cornish-john, Myxo, bansalsaab, Togoretastic, Vodakhan , lmdemasi, han233ing, steeto, BlazingSnow, pmatos, 0123coolkid, Zzzzz..., snowbaby, peacherwu2
Comments
on 16. August 2026, 22:09 by Myxo
Amazing!
Last changed on 17. August 2026, 10:16
on 16. August 2026, 20:17 by Snookerfan
Brilliant puzzle! Whenever you feel really smart, you should humble yourself by trying one of Sanabas's puzzles, thanks for the challenge.
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I want to start using a sig, just to put that quote there. :D Glad you enjoyed it.
on 15. August 2026, 21:28 by amirs
It was a tough one for sure and took me quite some time but I never felt stuck. Great challenge, very satisfying all the way through.
on 15. August 2026, 18:32 by Jooshy
Quite difficult, but well worth it, brilliant use of combining both modifier cells to create new logic. Thanks for sharing!
