Logic Masters Deutschland e.V.

• Hexagonal Kakuro: Place a digit from 1 to 9 in every empty cell such that digits do not repeat in an unbroken "row" (along any of the three directions in which cells share edges) without any black hexagons separating them.
  • Numbers in a black hexagon indicate the sum of digits that clue sees in the indicated direction, up until either the next black hexagon or the edge of the grid.
• Hexagonal Masyu: Draw a single closed, non-branching loop through the centers of some cells. The loop never visits the same cell more than once, and never enters black hexagons.
  • The loop must visit every circle. The color of the circle determines what the loop does:
  • On dark gray circles, the loop makes a sharp turn (60°), and goes straight through both of the adjoining cells.
  • On light gray circles, the loop makes a wide turn (120°), and goes straight through one of the adjoining cells, but makes a turn in the other (the turn may be either narrow or wide).
  • On white circles, the loop goes straight, and must make turns (either sharp or wide, or one of each) in both of the adjoining cells.
• German Whisper: Adjacent digits along the Masyu loop must differ by at least 5.

Penpa link (main puzzle)

Penpa link (example puzzle)