Second to last in the series, this is a Masyu Reconstruction. The one on the contest turned out to be pretty similar in style. The type could also go another way, with a heavier focus on making a puzzle unique with few givens.
Rules Place black and white pearls in some cells to form a valid Masyu puzzle, such that the clues in a row or column are equal to the outside givens in that order.
Another training puzzle, this is a 123 box, a variation on the ABC box that was introduced at the German Logic Masters.
Also, I’ve posted a Doppelter Rundweg on the puzzle portal. That one is probably the hardest puzzle I’ve constructed to date.
Rules Put a number from 1 to 3 in each cell. The hints correspond exactly to connected groups of equal numbers within that row/column. A number clue stands for a group that consists of that number, or is that size, or both. A question mark clue stands for an arbitrary non-empty group.
There’s an example with the (German) instructions on the puzzle wiki.
Feels like anything can happen with coded puzzles… Here’s one that’s probably of medium difficulty as far as coded corals go, though the puzzle type seems to be inherently difficult.
Rules Map the letters to distinct positive numbers, and solve the resulting Coral puzzle: Shade some cells, such that all shaded cells are connected by edge, such that no 2-by-2-square is fully shaded, and such that all unshaded cells are connected to the puzzle border by edge. For clued rows and columns, the clues give the lengths of all connected blocks of shaded cells, in any order.
Or see the instruction booklet.
Here’s another Maximal Lengths puzzle.
Here’s a slightly different take on the Liar Diagonal Slitherlink.
Rules Draw a loop that travels horizontally, vertically or diagonally from point to point. Clue numbers that are not crossed by diagonals are equal to the number of adjacent horizontal and vertical segments used by the loop. Those that are crossed by diagonals are different from that number. Furthermore, in every row and column, there is exactly one diagonal segment, and that diagonal crosses a clue.
Just survived this year’s 24h puzzle championship in Budapest! Congrats to the winners (Peter Hudak in first, edging out Nikola Zivanovic and Zoltan Horvath), and to Nils for winning the fight for best German. I expect to post (or link to) my contribution at some point, but for now here’s a Compass puzzle that I skipped in favour of two more accessible ones. Inspired by Nikolai’s survey of almost symmetric puzzles.
Maybe Puzzles 