One more Nanro Signpost.
Rules Shade some cells, so that all shaded cells are connected, and such that shaded cells don’t fill any 2×2 square. Clues indicated the number of shaded cells in an area; each area must have at least one shaded cell. Whenever two shaded cells touch across walls, the number of shaded cells within both areas must be different.
Or see the instruction booklet, with a somewhat different formulation of the rules.
One more practice puzzle, a Nanro Signpost.
Rules Shade some cells, so that all shaded cells are connected, and such that shaded cells don’t fill any 2×2 square. Clues indicated the number of shaded cells in an area; each area must have at least one shaded cell. Whenever two shaded cells touch across walls, the number of shaded cells within both areas must be different.
Or see the instruction booklet, with a somewhat different formulation of the rules.
Another Pentominous Borders, presumably closer to what we’ll get on the GP.
Rules Split the grid into pentominos by placing some walls between cells. Pentominos that touch by an edge must be different, where two pentominos are considered the same if one can be rotated and/or reflected to become the other. Some walls are already given. Black cells aren’t part of the grid.
Or see the instruction booklet.
Here’s a Pentominous Borders, a type that will be on the US GP round next weekend.
Rules Split the grid into pentominos by placing some walls between cells. Pentominos that touch by an edge must be different, where two pentominos are considered the same if one can be rotated and/or reflected to become the other. Some walls are already given. Black cells aren’t part of the grid.
Or see the instruction booklet.
I made a couple of puzzles for the Polish qualifiers back in February. I previously posted two more puzzles which didn’t make it: Angle Loop, Doubleback.
One Minesweeper puzzle (with an unknown number of mines). The kind of puzzle that just feels too trivial when constructing, although in the end I think it’s quite ok.
One Pentominous, with the obvious PL theme.
Finally a small an tricky Checkered Fillomino.
Here’s a Twopa puzzle that I probably made in preparation for the German GP round.
Rules Solve each grid as a regular Tapa, such that the configuration of shaded cells around each clue differs between the two grids. The solution is unique up to swapping the grids.
Or see the GP instruction booklet.
Here’s a Doubleback puzzle that’s not going to be on the upcoming Polish puzzle qualifiers. The tournament takes place at 12 CET on Sunday and is open to international solvers: competition page, instructions.
Today marks the start of a series of Checkered Fillominos on croco-puzzle, check them out! (Solving on time will require making an account; they become freely playable after one week. No Java required.)
Here’s an extra one; the croco series starts out a bit more gently than this.
Here’s a puzzle I made quite a while back, I believe the type was on some Sudoku GP round. It’s more puzzle than sudoku. I’m not sure the “different digits” constraint is required to make this one unique, but it should help.
Rules Solve as a standard sudoku. In addition, subdivide the grid into rectangles, such that each rectangle contains exactly one shaded cell, and such that the number in that cell is equal to the area of the rectangle. Rectangles must not contain any digit more than once.
Here’s a fractional fillomino. Please excuse the lazy rendering, I don’t expect to make more of these.
Rules Subdivide the grid into areas. Numbers within an area must equal the size (in unit squares) of that area. Areas of the same size must not touch along an edge.
Maybe Puzzles 