Logic Masters Deutschland e.V.

This puzzle was made in collaboration with cornishjohn.

Normal sudoku rules apply, place the digits 1-9 in each row/column/box without repeating.

Coral - Some cells are coral and others are water. Odd digits are coral; all coral cells are orthogonally connected. Even digits are water; there may be multiple bodies of water, and all bodies of water are orthogonally connected to the edge of the grid. No 2x2 area is entirely coral or entirely water.

Nonogram - Clues outside the grid indicate the length of continuous runs of coral or water. A * indicates any positive integer of continuous sets. In a row/column where clues are given, all clues are shown. For example, down column 1, there must exist some non-zero number of parity sets, followed by a set of length 1 of one parity type, immediately followed by a set of 3 of the opposite parity, followed by some non-zero number of parity sets.

Sandwich: The values given outside the grid also indicate the sum of the digits between 1 and 9 in the respective row/column read as n-digit number read from left to right or top down. For example, down row 1, the digits between 1 and 9 must sum to 13.

Digits along the marked diagonal sum to 43.

Solve on Sudokupad

Solve on Penpa(no solution check)