Logic Masters Deutschland e.V.

Solve in SudokuPad

Sudoku: Normal Sudoku rules apply.

Cave:

• The cave is a single region within the grid which is fully orthogonally connected.
• No 2x2 area may be entirely cave.
• Any two orthogonally-connected cells in the cave must differ by at least 4.

Walls:

• Cells which are not cave are walls.
• Each section of wall is fully orthogonally connected (but MAY contain 2x2 squares, unlike the cave).
• Each section of wall touches the edge of the grid.
• Each section of wall contains exactly one circle (and all circles are inside walls), which tells you how many cells form that section of wall.
• The circles form a complete set of the digits 1 to 9.

Japanese Sums:

• Clues outside the grid give the sums of cave cell segments in the respective row or column, in order, where wall cells separate segments.
• A question mark indicates any digit from 0 to 9, but no clue may have a leading zero.
• An asterisk denotes an arbitrary number of Japanese sum clues. This could be zero, one, or multiple.

Stalactites:

• Grey dots are stalactites and have no restriction on whether they form on walls, in the cave or in between the wall and the cave.
• Digits in any pair of cells connected by a grey dot have a 1:2 ratio OR differ by 1 OR both; you must determine which for each dot.
• Not all stalactites are necessarily given.