To solve you need to draw a single line ("snake") joining the two marked cells (each end).
The line may never touch itself, not even diagonally.
The numbers outside the grid show how many cells contain a snake segment in the corresponding row or column.
Input tips Select an icon to the right to make that the active value. Then click a cell or drag your mouse over
multiple adjacent cells to set them in one go.
Clear segment (unknown value)
Cell known to be clear
Use the mouse scroll wheel up/down to quickly change the active value
or enter "S" to set active value to Snake, or "D" for active value dot, or space for blank.