To get you in the mood, here’s one Killer Sudoku.

**Rules** Solve as a regular Sudoku. In addition, some cages are given. The cage clues indicate the sum of the digits within the cage. Digits can’t repeat within a cage.

In other news, results have now been posted: https://logic-masters.de/LM/2018_e_tabelle.php. (It seems linear time bonus really isn’t the right choice where players finish after a fraction of the round: On round 6 I took 3.5 minutes compared to the next player’s 5 minutes, for a factor 1.06 in points.)

**Rules** Solve as a regular Tapa, except the clues just specify the total number of shaded cells in the surrounding cells, as in Minesweeper.

I made a couple of puzzles to prepare, two of which I’ve published on the Rätselportal already: A Japanese Sums/Masyu hybrid and a hand-constructed (with the help of a friend, thank you!) unclued 5×5 skyscraper blocks that I’m very happy with!

Some more I’ll post here. To start, here’s a The Largest Number. The type was introduced at the 2017 WPC in India. I don’t think I’ve seen one without given numbers before.

**Rules** Fill the grid with numbers such that each room contains the numbers from 1 to the size of the room. Equal numbers can not be next to each other horizontally or vertically. Circle the largest number in each room. Then also circled numbers can not be next to each other horizontally or vertically.

**Rules** Solve as a regular Sudoku. Some pairs of numbers are friends. Dots mark all spots where two friends are next to each other.

Solve and check your solution here, or use PZV (but that doesn’t verify the no-touch rule).

]]>**Rules** Solve as a regular Nurikabe. Additionally, some skyscraper clues are given outside the grid. For these, consider the blocks of adjacent shaded cells within the corresponding row as skyscrapers with height equal to the number of cells in the block.

Or check the instruction booklet which includes an example.

You can solve online (of sorts) and check your code here.

]]>**Rules** Solve the grid as a regular skyscrapers puzzle, digits 1 through 5. In addition, small clues in the outer corners are skyscraper clues for the regular skyscraper clues along the outside. These 20 regular syscrapers clues are part of the solution.

For example, the regular skyscraper clues along the left side could be something like 1,3,5,2,2 to satisfy the second-level 3 clue in the top left corner.

Or see the rules of Round 20: Puzzle Fusion in the WPC instruction booklet, available at the WPC page. You can find an example there, too.

You can check your solution and solve online here.

]]>If you’re feeling adventurous, solve it (or verify that you did) with an experimental puzzle solving thingy I built: Puzzle 148: Fillomino.

]]>**Rules** Place the given set of dominoes in the marked domino tiles. Whenever two dominoes touch by an edge, the adjacent numbers must be the same. Clues outside the grid are skyscraper clues: They indicate the number of visible skyscrapers when looking along the corresponding row or column from that point, where each number represents a skyscraper of that height. Skyscrapers are blocked from view by those of greater or equal height.