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Cross+A Puzzle Variations



Slitherlink

In Sheep and Wolves the diagram contains the black circles ("sheep") and the black crosses ("wolves"). All sheep are supposed to be contained within the loop, while all the wolves should be kept outside.

Sheep and Wolves




Battleships

In Digital Battleships all cells of the grid contain numbers. The values on the right and bottom edges of the grid reveal the sum of the numbers in each of the ship pieces that appear in each respective row or column.

Digital Battleships




Fillomino

No Rectangles Fillomino: rectangular regions are not allowed.

No Rectangles Fillomino


Only Rectangles Fillomino: all regions must be rectangular.

Only Rectangles Fillomino


No 2 x 2 Squares Fillomino: no 2 x 2 cell area within the grid can contain the same numbers.

No 2 x 2 Squares Fillomino


Non-Consecutive Fillomino: any two adjacent regions must differ in size by at least two.

Non-Consecutive Fillomino


Consecutive Fillomino: any region of size N must be orthogonally adjacent to at least one other region of size N-1 or N+1.

Consecutive Fillomino


No Row/Column Repeats Fillomino: in each row and each column all cells with the same number must belong to the same region.

No Row/Column Repeats Fillomino


All Odds Fillomino: the size of each region must be an odd number.

All Odds Fillomino


All Evens Fillomino: the size of each region must be an even number.

All Evens Fillomino




Nurikabe

Pairs Nurikabe: each island must contain exactly two numbers (instead of one) and have total size equal to the sum of these numbers.

Pairs Nurikabe




Skyscrapers

In Sum Skyscrapers the number outside the grid indicates the sum of heights of visible buildings.

Sum Skyscrapers




Tapa

There are many variations of Tapa puzzle. Some of them can be solved by Cross+A.

Tapa [Line]: there may not be four consecutive black cells in any row or column.

Tapa [Line]


No Squares Tapa: no 2 x 2 cell area within the grid can contain all white cells.

No Squares Tapa


Equal Tapa: the amount of white cells (except clue cells) must be equal to the amount of black cells.

Equal Tapa


B&W Tapa:

  • Black cells and white cells should form two separate contiguous regions.
  • Clue cells are considered as white cells.
  • No 2 x 2 box can contain all white cells.

B&W Tapa


Tapa Islands:

  • White cells form separate areas ("islands") surrounded by the black cells.
  • Each separate area may contain at most one clue cell.
  • If there is a clue cell in an area, at least one digit should give the size of that area in unit squares.

Tapa Islands


Pata: the clues indicate the groups of connected white cells that are around the square; different groups of white cells are seperated by at least one black cell.

Pata


In Tapa Balance the amount of black cells in the left part of the grid is equal to the amount of black cells in the right part. Clues and white cells are considered weightless.

Tapa Balance


Tapa Row: the sum of all clue digits in the row is equal to the amount of black cells in this row.

Tapa Row


Tapa 1-n: all rows and columns should contain different amounts of black cells.

Tapa 1-n


In Dissected Tapa black cells and white cells form two congruent figures. Two figures are congruent if they have the same shape and size.

Dissected Tapa


Tapa [Diagonal Neighbors]: every black cell must have at least one diagonally adjacent black cell.

Tapa [Diagonal Neighbors]




Corral

Inside/Outside Corral is a variation of Corral puzzle. The numbers can be inside the loop and outside the loop. In both cases the number indicates how many cells can be seen horizontally and vertically from that cell, including the cell itself.

Inside/Outside Corral




Arukone

Arukone3:

  • Every line must not cover 2 x 2 area.
  • All cells in the grid must be filled.

Arukone