Normal Sudoku rules apply.
Draw a one-cell-wide loop of orthogonally connected cells. The loop may not touch itself, not even diagonally.
At every turn, the digit equals the sum of the digits in the two neighboring cells along the loop.
Digits along each arrow sum to the digit in its circle. Each circle is on the loop.
Solution code: Digits on the loop in row 6 (left to right) followed by digits on the loop in column 8 (top to bottom)
on 13. September 2026, 13:24 by Firebird
Remarkable puzzle, very enjoyable to discover the implications of this ruleset. Thank you!
on 13. September 2026, 02:21 by lootyloot
link should be https://sudokupad.app/5hyvd6u1ew
Tessarin: Oops, thank you! Fixed.
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