Logic Masters Deutschland e.V.

This puzzle was created for Isajo4002 as part of CTC's secret Santa event for 2025. He really enjoyed the puzzle and wanted me to publish it. You can solve the puzzle online here: Penpa
.

Rules
There are 6 10x10 grids with six different pencil puzzle rulesets. The rules apply only to that 10x10 grid and clues don't see outside their grid. For overlaps, both rules apply at the same time. Cells with loop segments count as unshaded for shading puzzles and the loop cannot go through shaded cells.

Creek:
Shade some cells so that the remaining unshaded cells form one orthogonally connected area. A clue represents how many of the (up to) four cells it touches are shaded.

Geradeweg:
Draw a non-intersecting loop through the centers of some cells that passes through every clue. Every straight line segment that touches a clue must have a length equal to the clue’s value.

Martini:
Shade some cells such that all shaded cells within a region form a single orthogonally connected group. Shaded groups may not be orthogonally adjacent, but must all form a single diagonally connected network. Cells with black circles must be shaded. Cells with white circles must not. A number in a white circle indicates the total number of circles that are in its orthogonally connected area of unshaded cells.

Nurikabe:
Shade some cells so that all shaded cells form one orthogonally connected area and no 2x2 region is entirely shaded. Clues cannot be shaded, and every orthogonally connected area of unshaded cells contains exactly one clue, the value of which represents the size of the area.

Nuritwin:
Shade some cells such that all shaded cells form one orthogonally connected area. Within each region, there are exactly 2 connected groups of shaded cells, which must have the same size. A number indicates the size of each connected group inside that region. The shaded cells cannot form a 2x2 square.

Tapa:
Shade some cells so that all shaded cells form one orthogonally connected area and no 2x2 region is entirely shaded. Clues cannot be shaded, and represent the lengths of the blocks of consecutive shaded cells in the (up to) eight cells surrounding the clue