Logic Masters Deutschland e.V.

Touching Slitherlink: Draw a closed loop that travels between some vertices of the grid that uses each gridpoint at most once. Clues indicate how many times the loop visits the respective cells. In this context, a “visit” is defined as a contiguous section of the loop traveling on the boundary of the cell in question, including the possibility of just a single corner point; two such sections are considered separate visits if the loop leaves the boundary of the cell between them.

Blackout Tetrominos: Blacken some cells in the grid such that all blackened cells form tetrominos, and no two tetromino shapes may repeat, including rotations or reflections. Tetrominos may not touch each other, even diagonally. If a cell with a clue is blackened, then that clue is ignored. Every tetromino must be placed outside the loop.

Play on Penpa+!

Answer check is enabled with green loop segments, and the tetrominos must be shaded any of the three choices of grey.