Logic Masters Deutschland e.V.

Rules:

1)Latin Square: Place the digits 1-9 into every row and column once each.

2)Permaculture: Divide the grid into 2 areas of orthogonally connected cells. One of them is a Cave, the other is a Coral.

3)Cave: Shade some cells such that each unshaded cell is orthogonally connected (creating the cave), and each block of shaded cells is orthogonally connected to an edge of the cave area (the walls). All clued cells are unshaded, and indicate the total count of unshaded cells connected vertically and horizontally to the clued cell, including itself. Permaculture borders block vision for clued cells.

4)Coral: (Variant) Shade some empty cells to create a single connected wall (the “Coral”). Shaded cells cannot form a 2×2 square anywhere in the area, and each unshaded cell block must be connected to an edge of the Coral area. All clued cells are unshaded, and indicate the amount of shaded cells found in their row and column combined. Permaculture borders block vision for clued cells.

5)Japanese Sums: Clues outside the grid are Japanese Sums clues, which indicate the sums of the connected unshaded blocks in their corresponding row/column, in correct order. For each row or column, all clues are provided. Permaculture border splits Japanese Sums clues the same way shaded cells do. A ? is any digit from 1-9.

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