Logic Masters Deutschland e.V.

Caldera

• Normal sudoku rules apply.
• The grid doubles as a Nurikabe puzzle.
• Shade some cells such that all shaded cells are orthogonally connected and no 2x2 region is entirely shaded. Unshaded cells form orthogonally connected regions called islands.
• Each caged cell/domino is an island clue, the sum of the cage is the number of cells in that island. Each island contains exactly one clue. There are no islands without clues.
• Cages sum to the number in the corner or follow a condition if given. Digits may not repeat in caged cells which see each other diagonally.
• Digits on an island form a set of non-repeating consecutive digits. For the 12 cell island, only the cells not in box 5 form this set and one of the digits must equal the size of the set.
• Digits separated by a white dot are consecutive. Not all dots are given

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If you enjoy please consider checking out my other puzzles :)