Logic Masters Deutschland e.V.

Ice Cream Sandwich

• Normal Sudoku rules apply.
• Sandwich: Clues outside of the grid give the sum of the digits between 1 and 9 in their respective row or column.
• Icebarn Hybrid: All of the cells containing even digits in the grid are icy cells for the Icebarn rules below. Cells containing odd digits are not icy cells. Cells containing arrows are not icy cells and must contain odd digits.
• Icebarn Rules (standard): Draw a line that starts at the IN arrow and goes through every arrow before reaching the OUT arrow. Two perpendicular line segments may intersect each other only on icy cells, but the line may not branch or otherwise overlap. The line may not turn on icy cells. The line cannot go against the direction of an arrow. Orthogonally connected icy cells are called an Icebarn, and every Icebarn must be visited at least once by the line. A single icy cell that does not orthogonally connect to other icy cells is still an Icebarn and must be visited by the line at least once. [Icebarn Examples: Click Here]

Sudokupad: Click Here

Penpa+: Click Here

Enjoy!