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Crosswords

Structures

Enigmistics.CrosswordWord — Type
CrosswordWord

Structure for a word placed in the crossword.

Fields

  • word::String: the actual word
  • row::Int: starting row
  • col::Int: starting column
  • direction::Symbol: either :vertical or :horizontal
source
Enigmistics.CrosswordBlackCell — Type
CrosswordBlackCell

Structure for a black cell placed in the crossword.

Fields

  • count::Float64: number of words that share that black cell (or Inf64 if it was manually placed)
  • manual::Bool: if the cell was manually set by user or automatically derived based on surrounding words
source
Enigmistics.CrosswordPuzzle — Type
CrosswordPuzzle

Structure for a crossword puzzle.

Fields

  • grid::Matrix{Char}: the actual crossword grid
  • words::Vector{CrosswordWord}: vector containing all the words
  • black_cells::Dict{Tuple{Int,Int}, CrosswordBlackCell}: dictionary storing the black cells information
source

Here are some useful constructors:

Enigmistics.CrosswordPuzzle — Method
CrosswordPuzzle(rows::Int, cols::Int)

Construct a crossword with an empty grid of the given dimensions.

Examples

julia> cw = CrosswordPuzzle(4,5)
    1  2  3  4  5 
  ┌───────────────┐
1 │ ⋅  ⋅  ⋅  ⋅  ⋅ │
2 │ ⋅  ⋅  ⋅  ⋅  ⋅ │
3 │ ⋅  ⋅  ⋅  ⋅  ⋅ │
4 │ ⋅  ⋅  ⋅  ⋅  ⋅ │
  └───────────────┘
source
Enigmistics.CrosswordPuzzle — Method
CrosswordPuzzle(rows::Int, cols::Int, words::Vector{CrosswordWord})

Construct a crossword with the given dimensions and words. Return an error if words intersections are not compatible.

Examples

julia> words = [CrosswordWord("CAT",2,2,:horizontal), CrosswordWord("MAP",1,3,:vertical),
                CrosswordWord("SIR",4,4,:horizontal)];

julia> CrosswordPuzzle(5,6,words)
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ ⋅  ⋅  M  ⋅  ⋅  ⋅ │
2 │ ■  C  A  T  ■  ⋅ │
3 │ ⋅  ⋅  P  ⋅  ⋅  ⋅ │
4 │ ⋅  ⋅  ■  S  I  R │
5 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
  └──────────────────┘

julia> words = [CrosswordWord("CAT",2,2,:horizontal), CrosswordWord("MAP",1,3,:vertical),
                CrosswordWord("SIR",4,4,:horizontal), CrosswordWord("DOG",1,2,:vertical)];

julia> CrosswordPuzzle(5,6,words)
┌ Warning: Cannot place word 'DOG' at (1, 2) vertically due to conflict at cell (2, 2); found when checking the inner cells.
┌ Error: Words intersections are not compatible.
source
Enigmistics.CrosswordPuzzle — Method
CrosswordPuzzle(words::Vector{CrosswordWord})

Construct a crossword with the given words (dimensions are inferred from words positions). Return an error if words intersections are not compatible.

Examples

julia> words = [CrosswordWord("CAT",2,2,:horizontal), CrosswordWord("MAP",1,3,:vertical),
                CrosswordWord("SIR",4,4,:horizontal)];

julia> CrosswordPuzzle(words)
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ ⋅  ⋅  M  ⋅  ⋅  ⋅ │
2 │ ■  C  A  T  ■  ⋅ │
3 │ ⋅  ⋅  P  ⋅  ⋅  ⋅ │
4 │ ⋅  ⋅  ■  S  I  R │
  └──────────────────┘

julia> words = [CrosswordWord("CAT",2,2,:horizontal), CrosswordWord("MAP",1,3,:vertical),
                CrosswordWord("SIR",4,4,:horizontal), CrosswordWord("DOG",1,2,:vertical)];

julia> CrosswordPuzzle(words)
┌ Warning: Cannot place word 'DOG' at (1, 2) vertically due to conflict at cell (2, 2); found when checking the inner cells.
┌ Error: Words intersections are not compatible.
source

Interface

Enigmistics.show_crossword — Function
show_crossword(cw::CrosswordPuzzle; words_details=true, black_cells_details=true)

Print the crossword grid, possibly along with the words details and black cells details.

Examples

julia> cw = example_crossword(type="full") # normal output
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  O  ■  A │
3 │ T  ■  S  O  U  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ W  I  N  D  O  W │
  └──────────────────┘

julia> show_crossword(cw) # extended details output
    1  2  3  4  5  6
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  O  ■  A │
3 │ T  ■  S  O  U  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ W  I  N  D  O  W │
  └──────────────────┘

Horizontal:
 - 'GOLDEN' at (1, 1)
 - 'AN' at (2, 1)
 - 'SOUR' at (3, 3)
 - 'EVER' at (4, 1)
 - 'IE' at (5, 2)
 - 'WINDOW' at (6, 1)
Vertical:
 - 'GATE' at (1, 1)
 - 'ON' at (1, 2)
 - 'DOOR' at (1, 4)
 - 'NARROW' at (1, 6)
 - 'SEEN' at (3, 3)
 - 'VII' at (4, 2)

Black cells:
 - at (5, 5) was manually placed
 - at (3, 2) was automatically derived (delimiting 3 words)
 - at (4, 5) was automatically derived (delimiting 1 words)
 - at (2, 5) was manually placed
 - at (5, 1) was automatically derived (delimiting 2 words)
 - at (2, 3) was automatically derived (delimiting 2 words)
 - at (5, 4) was automatically derived (delimiting 2 words)
source
Enigmistics.example_crossword — Function
example_crossword(; type="full")

Return an example crossword, useful e.g during testing. Available values for now are

  • "full": a complete crossword with all words
  • "partial": an incomplete crossword with some words missing

Examples

julia> cw = example_crossword(type="full")
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  O  ■  A │
3 │ T  ■  S  O  U  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ W  I  N  D  O  W │
  └──────────────────┘

julia> example_crossword(type="partial")
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ ⋅  I  ⋅  ⋅  ⋅  W │
  └──────────────────┘
source
Enigmistics.enlarge! — Function
enlarge!(cw::CrosswordPuzzle, how::Symbol, times=1)

Enlarge the crossword grid in the direction given by how (accepted values are :N, :S, :E, :O) by appropriately inserting times empty rows/columns.

Examples

julia> cw = example_crossword()
    1  2  3  4  5  6
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  O  ■  A │
3 │ T  ■  S  O  U  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ W  I  N  D  O  W │
  └──────────────────┘

julia> enlarge!(cw, :O); cw
    1  2  3  4  5  6  7 
  ┌─────────────────────┐
1 │ ■  G  O  L  D  E  N │
2 │ ■  A  N  ■  O  ■  A │
3 │ ⋅  T  ■  S  O  U  R │
4 │ ■  E  V  E  R  ■  R │
5 │ ⋅  ■  I  E  ■  ■  O │
6 │ ■  W  I  N  D  O  W │
  └─────────────────────┘

julia> enlarge!(cw, :N, 2); cw
    1  2  3  4  5  6  7 
  ┌─────────────────────┐
1 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
2 │ ⋅  ■  ■  ⋅  ■  ⋅  ■ │
3 │ ■  G  O  L  D  E  N │
4 │ ■  A  N  ■  O  ■  A │
5 │ ⋅  T  ■  S  O  U  R │
6 │ ■  E  V  E  R  ■  R │
7 │ ⋅  ■  I  E  ■  ■  O │
8 │ ■  W  I  N  D  O  W │
  └─────────────────────┘
source
Enigmistics.shrink! — Function
shrink!(cw::CrosswordPuzzle)

Reduce the crossword size to its minimal representation by removing useless rows/columns.

Examples

julia> cw
    1  2  3  4  5  6  7  8  9
  ┌───────────────────────────┐
1 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
2 │ ⋅  ■  ■  ⋅  ■  ⋅  ■  ⋅  ⋅ │
3 │ ■  G  O  L  D  E  N  ■  ⋅ │
4 │ ■  A  N  ■  O  ■  A  ⋅  ⋅ │
5 │ ⋅  T  ■  S  O  U  R  ■  ⋅ │
6 │ ■  E  V  E  R  ■  R  ⋅  ⋅ │
7 │ ⋅  ■  I  E  ■  ■  O  ⋅  ⋅ │
8 │ ■  W  I  N  D  O  W  ■  ⋅ │
9 │ ⋅  ⋅  ■  ■  ⋅  ⋅  ■  ⋅  ⋅ │
  └───────────────────────────┘

julia> shrink!(cw); cw
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  O  ■  A │
3 │ T  ■  S  O  U  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ W  I  N  D  O  W │
  └──────────────────┘
source
Enigmistics.can_place_word — Function
can_place_word(cw::CrosswordPuzzle, word::String, row, col, direction::Symbol)
can_place_word(cw::CrosswordPuzzle, cwword::CrosswordWord)

Check if a word can be placed in the crossword puzzle cw at the given position and direction.

Return true if the word can be placed, false otherwise.

Examples

julia> cw = example_crossword(type="partial")
    1  2  3  4  5  6
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ ⋅  I  ⋅  ⋅  ⋅  W │
  └──────────────────┘

julia> can_place_word(cw, "PEARS", 3, 3, :h)
┌ Warning: Word 'PEARS' does not fit in the grid horizontally at (3, 3).
false

julia> can_place_word(cw, "BEAN", 3, 3, :h)
┌ Warning: Cannot place word 'BEAN' at (3, 3) horizontally due to conflict at cell (3, 6); found when checking the inner cells.
false

julia> can_place_word(cw, "TEA", 3, 3, :h)
┌ Warning: Cannot place word 'TEA' at (3, 3) horizontally due to conflict at cell (3, 6); found when checking the border cells.
false

julia> can_place_word(cw, "DEAR", 1, 4, :v)
true
source
Enigmistics.place_word! — Function
place_word!(cw::CrosswordPuzzle, word::String, row, col, direction::Symbol)
place_word!(cw::CrosswordPuzzle, cword::CrosswordWord)

Place a word in the crossword puzzle cw at the given position and direction, also checking if it can actually be placed.

Return true if the word was successfully placed, false otherwise.

Examples

julia> cw = example_crossword(type="partial")
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ ⋅  I  ⋅  ⋅  ⋅  W │
  └──────────────────┘

julia> place_word!(cw, "cat", 6, 1, :h)
┌ Warning: Cannot place word 'CAT' at (6, 1) horizontally due to conflict at cell (6, 2); found when checking the inner cells.
false

julia> place_word!(cw, "pillow", 6, 1, :h)
true

julia> cw
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ P  I  L  L  O  W │
  └──────────────────┘
source
Enigmistics.remove_word! — Function
remove_word!(cw::CrosswordPuzzle, word::String)
remove_word!(cw::CrosswordPuzzle, cword::CrosswordWord)
remove_word!(cw::CrosswordPuzzle, words::Vector{String})
remove_word!(cw::CrosswordPuzzle, words::Vector{CrosswordWord})

Remove a word (or multiple words) from the crossword puzzle cw.

Return true if the word was found and removed, false otherwise.

Examples

julia> cw = example_crossword(type="partial")
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ ⋅  I  ⋅  ⋅  ⋅  W │
  └──────────────────┘

julia> remove_word!(cw, "cat")
┌ Warning: Word 'CAT' not found in the crossword. No changes on the original grid.
false

julia> remove_word!(cw, "narrow")
true

julia> cw
    1  2  3  4  5  6
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  ⋅ │
3 │ T  ■  ⋅  ⋅  ⋅  ⋅ │
4 │ E  V  E  R  ■  ⋅ │
5 │ ■  I  E  ■  ■  ⋅ │
6 │ ⋅  I  ⋅  ⋅  ⋅  ⋅ │
  └──────────────────┘
source
Enigmistics.place_black_cell! — Function
place_black_cell!(cw::CrosswordPuzzle, row::Int, col::Int; symmetry=false, double_symmetry=false)

Place a black cell in the crossword puzzle cw at the given position.

Return true if the black cell was successfully placed, false otherwise.

Examples

julia> cw = example_crossword(type="partial")
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ ⋅  I  ⋅  ⋅  ⋅  W │
  └──────────────────┘

julia> place_black_cell!(cw, 6, 2)
┌ Warning: Cannot place black cell at position (6, 2) since cell is not empty. No changes on the original grid.
false

julia> place_black_cell!(cw, 6, 4)
true

julia> cw
    1  2  3  4  5  6
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ ⋅  I  ⋅  ■  ⋅  W │
  └──────────────────┘
source
Enigmistics.remove_black_cell! — Function
remove_black_cell!(cw::CrosswordPuzzle, row::Int, col::Int)

Remove a black cell from the crossword puzzle cw at the given position.

Return true if the black cell was successfully removed, false otherwise.

Examples

julia> cw = example_crossword(type="partial"); show_crossword(cw, words_details=false)
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ ⋅  I  ⋅  ⋅  ⋅  W │
  └──────────────────┘

Black cells:
 - at (5, 5) was manually placed
 - at (4, 5) was automatically derived (delimiting 1 words)
 - at (3, 2) was automatically derived (delimiting 2 words)
 - at (2, 5) was manually placed
 - at (5, 1) was automatically derived (delimiting 2 words)
 - at (2, 3) was automatically derived (delimiting 1 words)
 - at (5, 4) was automatically derived (delimiting 1 words)

julia> remove_black_cell!(cw, 3, 2)
┌ Warning: Cannot remove automatically placed black cell at position (3, 2) since it's needed as a word delimiter. No changes on the original grid.
false

julia> remove_black_cell!(cw, 5, 5)
true

julia> cw
    1  2  3  4  5  6
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ⋅  O │
6 │ ⋅  I  ⋅  ⋅  ⋅  W │
  └──────────────────┘
source
Enigmistics.clear! — Function
clear!(cw::CrosswordPuzzle; deep=false)

Clear all words, possibly preserving manually-placed black cells (with deep=false), from the crossword puzzle cw.

Examples

julia> cw = example_crossword(); show_crossword(cw, words_details=false)
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  O  ■  A │
3 │ T  ■  S  O  U  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ W  I  N  D  O  W │
  └──────────────────┘

Black cells:
 - at (5, 5) was manually placed
 - at (3, 2) was automatically derived (delimiting 3 words)
 - at (4, 5) was automatically derived (delimiting 1 words)
 - at (2, 5) was manually placed
 - at (5, 1) was automatically derived (delimiting 2 words)
 - at (2, 3) was automatically derived (delimiting 2 words)
 - at (5, 4) was automatically derived (delimiting 2 words)

julia> clear!(cw)
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
2 │ ⋅  ⋅  ⋅  ⋅  ■  ⋅ │
3 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
4 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
5 │ ⋅  ⋅  ⋅  ⋅  ■  ⋅ │
6 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
  └──────────────────┘

julia> clear!(cw, deep=true)
    1  2  3  4  5  6
  ┌──────────────────┐
1 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
2 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
3 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
4 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
5 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
6 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
  └──────────────────┘
source

Patterns

Enigmistics.random_pattern — Function
random_pattern(nrows, ncols; 
	max_density=0.18, symmetry=true, double_symmetry=true, 
	seed=rand(Int))

Generate a crossword puzzle with black cells placed according to a random pattern which can be totally random, symmetric, or doubly symmetric (i.e. specular).

Arguments

  • nrows::Int, ncols::Int: grid dimensions
  • max_density::Float=0.18: maximum density of black cells
  • symmetry::Bool=true: whether to enforce symmetry
  • double_symmetry::Bool=false: whether to enforce double symmetry (i.e. specularity)
  • seed::Int=rand(Int): random seed for reproducibility

Examples

julia> random_pattern(12, 20, symmetry=false, seed=1)
     1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20
   ┌────────────────────────────────────────────────────────────┐
 1 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ■  ⋅  ⋅  ■ │
 2 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 3 │ ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅ │
 4 │ ■  ⋅  ■  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ■  ⋅  ■  ⋅ │
 5 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ■  ⋅  ⋅ │
 6 │ ⋅  ⋅  ■  ⋅  ⋅  ⋅  ■  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅ │
 7 │ ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ■  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅ │
 8 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ■  ⋅  ⋅  ⋅  ⋅ │
 9 │ ⋅  ■  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅ │
10 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ■  ⋅  ■  ⋅  ⋅  ■  ⋅ │
11 │ ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ■  ⋅  ■  ⋅  ⋅  ■ │
12 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
   └────────────────────────────────────────────────────────────┘

julia> random_pattern(12, 20, symmetry=true, seed=1)
     1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20
   ┌────────────────────────────────────────────────────────────┐
 1 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■ │
 2 │ ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅ │
 3 │ ■  ⋅  ⋅  ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 4 │ ■  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅ │
 5 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ■  ⋅  ■  ⋅  ⋅ │
 6 │ ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ■  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅ │
 7 │ ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ■  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅ │
 8 │ ⋅  ⋅  ■  ⋅  ■  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 9 │ ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ■ │
10 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ⋅  ⋅  ■ │
11 │ ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅ │
12 │ ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
   └────────────────────────────────────────────────────────────┘

julia> random_pattern(12, 20, symmetry=true, double_symmetry=true, seed=1)
     1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 
   ┌────────────────────────────────────────────────────────────┐
 1 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 2 │ ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅ │
 3 │ ■  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ■ │
 4 │ ■  ⋅  ■  ■  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ■  ■  ⋅  ■ │
 5 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 6 │ ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ■  ■  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅ │
 7 │ ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ■  ■  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅ │
 8 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 9 │ ■  ⋅  ■  ■  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ■  ■  ⋅  ■ │
10 │ ■  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ■ │
11 │ ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅ │
12 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
   └────────────────────────────────────────────────────────────┘
source
Enigmistics.striped_pattern — Function
striped_pattern(nrows, ncols; 
	max_density = 0.18, 
	min_stripe_dist = 4, keep_stripe_prob = 0.9,
	symmetry = true, double_symmetry = false, 
	seed=rand(Int))

Generate a crossword puzzle with black cells placed according to a striped pattern which can be random, symmetric, or doubly symmetric (i.e. specular).

Arguments

  • nrows::Int, ncols::Int: grid dimensions
  • max_density::Float=0.18: maximum density of black cells
  • min_stripe_dist::Int=4: minimum distance allowed between stripes
  • keep_stripe_prob::Float=0.8: probability of continuing a stripe
  • symmetry::Bool=true: whether to enforce symmetry
  • double_symmetry::Bool=false: whether to enforce double symmetry (i.e. specularity)
  • seed::Int=rand(Int): random seed for reproducibility

Examples

julia> striped_pattern(12, 20, symmetry=false, seed=1)
     1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 
   ┌────────────────────────────────────────────────────────────┐
 1 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅ │
 2 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅ │
 3 │ ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅ │
 4 │ ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅ │
 5 │ ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅ │
 6 │ ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 7 │ ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 8 │ ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅ │
 9 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■ │
10 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅ │
11 │ ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅ │
12 │ ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅ │
   └────────────────────────────────────────────────────────────┘

julia> striped_pattern(12, 20, symmetry=true, seed=1)
     1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 
   ┌────────────────────────────────────────────────────────────┐
 1 │ ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅ │
 2 │ ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅ │
 3 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅ │
 4 │ ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅ │
 5 │ ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅ │
 6 │ ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 7 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅ │
 8 │ ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■ │
 9 │ ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅ │
10 │ ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
11 │ ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅ │
12 │ ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅ │
   └────────────────────────────────────────────────────────────┘

julia> striped_pattern(12, 20, symmetry=true, double_symmetry=true, seed=1)
     1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 
   ┌────────────────────────────────────────────────────────────┐
 1 │ ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅ │
 2 │ ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅ │
 3 │ ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅ │
 4 │ ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅ │
 5 │ ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅ │
 6 │ ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅ │
 7 │ ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅ │
 8 │ ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅ │
 9 │ ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅ │
10 │ ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅ │
11 │ ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅ │
12 │ ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅ │
   └────────────────────────────────────────────────────────────┘
source
Enigmistics.famous_patterns — Function
famous_patterns(; style=:NewYorkTimes, grid_size=nothing, seed=rand(Int))

Generate a crossword puzzle according to on a famous historical or standard pattern.

Available styles are: :NewYorkTimes, :Diamond, :BritishCryptic, :Spiral. For each style, the following optional arguments are supported:

  • Diamond: grid_size=(13,13)
  • BritishCryptic: grid_size=(15,15), seed=rand(Int)
  • Spiral: step_size=0.1, radius_function=(θ->0.8*θ), max_theta=4π

Example

julia> cw = famous_patterns(style=:NewYorkTimes)
     1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 
   ┌─────────────────────────────────────────────┐
 1 │ ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅ │
 2 │ ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅ │
 3 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 4 │ ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 5 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ■  ■ │
 6 │ ■  ■  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅ │
 7 │ ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 8 │ ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅ │
 9 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅ │
10 │ ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ■  ■ │
11 │ ■  ■  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
12 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅ │
13 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
14 │ ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅ │
15 │ ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅ │
   └─────────────────────────────────────────────┘

julia> famous_patterns(style=:Diamond)
     1  2  3  4  5  6  7  8  9 10 11 12 13 
   ┌───────────────────────────────────────┐
 1 │ ■  ■  ■  ■  ■  ■  ⋅  ■  ■  ■  ■  ■  ■ │
 2 │ ■  ■  ■  ■  ■  ⋅  ⋅  ⋅  ■  ■  ■  ■  ■ │
 3 │ ■  ■  ■  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ■  ■  ■ │
 4 │ ■  ■  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ■  ■ │
 5 │ ■  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ■ │
 6 │ ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■ │
 7 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 8 │ ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■ │
 9 │ ■  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ■ │
10 │ ■  ■  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ■  ■ │
11 │ ■  ■  ■  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ■  ■  ■ │
12 │ ■  ■  ■  ■  ■  ⋅  ⋅  ⋅  ■  ■  ■  ■  ■ │
13 │ ■  ■  ■  ■  ■  ■  ⋅  ■  ■  ■  ■  ■  ■ │
   └───────────────────────────────────────┘

julia> famous_patterns(style=:BritishCryptic, grid_size=(15,15), seed=42)
┌ Info: Using seed
└   seed = 42
     1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 
   ┌─────────────────────────────────────────────┐
 1 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 2 │ ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅ │
 3 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 4 │ ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅ │
 5 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 6 │ ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ■ │
 7 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 8 │ ⋅  ■  ⋅  ■  ■  ■  ⋅  ■  ⋅  ■  ■  ■  ⋅  ■  ⋅ │
 9 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
10 │ ■  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅ │
11 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
12 │ ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅ │
13 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
14 │ ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅  ■  ⋅ │
15 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
   └─────────────────────────────────────────────┘

julia> cw = famous_patterns(style=:Spiral)
     1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 
   ┌──────────────────────────────────────────────────────┐
 1 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 2 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 3 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ■  ■  ⋅  ⋅  ■  ■  ■  ⋅  ⋅  ⋅  ⋅ │
 4 │ ⋅  ⋅  ⋅  ⋅  ■  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅ │
 5 │ ⋅  ⋅  ⋅  ■  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅ │
 6 │ ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅ │
 7 │ ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ■  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅ │
 8 │ ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ■  ⋅  ■  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅ │
 9 │ ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ■  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅ │
10 │ ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ■  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅ │
11 │ ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅ │
12 │ ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅ │
13 │ ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅ │
14 │ ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ■  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ■  ⋅  ⋅ │
15 │ ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ■  ■  ■  ■  ⋅  ⋅  ⋅  ⋅ │
16 │ ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
17 │ ⋅  ⋅  ⋅  ■  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
18 │ ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
19 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
20 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
21 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
   └──────────────────────────────────────────────────────┘
source

IO

Enigmistics.save_crossword — Function
save_crossword(cw::CrosswordPuzzle, filename::String)

Save the crossword puzzle cw to a text file specified by filename.

The grid is saved using the following conventions:

  • / represents a black cell
  • . represents an empty cell
  • letters represent filled cells

Examples

julia> cw = example_crossword(type="full")
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  O  ■  A │
3 │ T  ■  S  O  U  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ W  I  N  D  O  W │
  └──────────────────┘

julia> save_crossword(cw, "ex1.txt")
file ex1.txt:
GOLDEN
AN/O/A
T/SOUR
EVER/R
/IE//O
WINDOW
source
Enigmistics.load_crossword — Function
load_crossword(path::String)

Load a crossword puzzle from a text file specified by path.

The grid should be written in the file using the following conventions:

  • / represents a black cell
  • . represents an empty cell
  • letters represent filled cells

Examples

file ex2.txt:
GOLDEN
AN/O/.
T/SOUR
EVER/.
/IE/S.
.IN.O.
julia> cw = load_crossword("ex2.txt"); show_crossword(cw)
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  O  ■  ⋅ │
3 │ T  ■  S  O  U  R │
4 │ E  V  E  R  ■  ⋅ │
5 │ ■  I  E  ■  S  ⋅ │
6 │ ⋅  I  N  ⋅  O  ⋅ │
  └──────────────────┘

Horizontal:
 - 'GOLDEN' at (1, 1)
 - 'AN' at (2, 1)
 - 'SOUR' at (3, 3)
 - 'EVER' at (4, 1)
 - 'IE' at (5, 2)
Vertical:
 - 'GATE' at (1, 1)
 - 'ON' at (1, 2)
 - 'VII' at (4, 2)
 - 'SEEN' at (3, 3)
 - 'DOOR' at (1, 4)
 - 'SO' at (5, 5)

Black cells:
 - at (3, 2) was automatically derived (delimiting 3 words)
 - at (4, 5) was automatically derived (delimiting 2 words)
 - at (2, 5) was manually placed
 - at (5, 1) was automatically derived (delimiting 2 words)
 - at (2, 3) was automatically derived (delimiting 2 words)
 - at (5, 4) was automatically derived (delimiting 2 words)
source
Enigmistics.to_latex — Function
to_latex(cw::CrosswordPuzzle)

Generate a string containing the LaTeX code which can be used (through the cwpuzzle package) to represent the crossword puzzle cw.

Example

# Create your crossword
julia> cw = example_crossword(type="full")
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  O  ■  A │
3 │ T  ■  S  O  U  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ W  I  N  D  O  W │
  └──────────────────┘

julia> open("out_latex.tex", "w") do file
    write(file, to_latex(cw))
end
source

Automation

Slots

Enigmistics.Slot — Type
Slot

Structure for a crossword slot, i.e. a place where a word can be placed.

Fields

  • row::Int, col::Int: slot position
  • direction::Symbol: slot direction (:horizontal or :vertical)
  • length::Int: slot length
  • pattern::String: slot pattern, describing letters or blank spaces in its cells
  • flexible_start::Bool: can this slot be potentially expanded at the start (e.g. is it at the border of the grid)?
  • flexible_end::Bool: can this slot be potentially expanded at the end (e.g. is it at the border of the grid)?
source
Enigmistics.find_constrained_slots — Function
find_constrained_slots(cw::CrosswordPuzzle)

Find all slots (horizontal and vertical) in the crossword puzzle cw that are constrained, i.e. that have at least one empty cell and length at least 2 characters.

Examples

julia> cw = example_crossword(type="partial")
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ ⋅  I  ⋅  ⋅  ⋅  W │
  └──────────────────┘

julia> find_constrained_slots(cw)
4-element Vector{Slot}:
 Slot(3, 3, :horizontal, 4, "...R", false, true)
 Slot(6, 1, :horizontal, 6, ".I...W", true, true)
 Slot(3, 3, :vertical, 4, ".EE.", false, true)
 Slot(1, 4, :vertical, 4, "D..R", true, false)
source
Enigmistics.compute_options_simple — Function
compute_options_simple(cw::CrosswordPuzzle, s::Slot; verbose=false)

Compute the number of fitting words for a slot s of the crossword cw considering its pattern and length.

Return a tuple (n_options, candidates), where n_options is the number of fitting words and candidates is a vector containing the list of fitting words.

Examples

julia> cw = example_crossword(type="partial")
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ ⋅  I  ⋅  ⋅  ⋅  W │
  └──────────────────┘

julia> slots = find_constrained_slots(cw); slots[2]
Slot(6, 1, :horizontal, 6, ".I...W", true, true)

julia> compute_options_simple(cw, slots[2], verbose=true)
- simple fitting, length: 6 => #options: 19
      some are ["AIMLOW", "BIGWOW", "BILLOW", "JIGSAW", "KIDROW", "LIELOW", "MIDBOW", "MILDEW", "MINNOW", "PILLOW"]
source
Enigmistics.compute_options_split — Function
compute_options_split(cw::CrosswordPuzzle, s::Slot; verbose=false)

Compute the number of fitting words for a slot s of the crossword cw by simulating the placement of black cells at each internal position of the slot, i.e. possibly splitting the original slot into two smaller slots.

Return a tuple (n_options, candidates), where n_options is a dictionary mapping the internal position of the black cell to the number of fitting words, and candidates is a dictionary mapping that same key to a tuple of two lists of fitting words (left and right sub-slots).

Examples

julia> cw = example_crossword(type="partial")
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ ⋅  I  ⋅  ⋅  ⋅  W │
  └──────────────────┘

julia> slots = find_constrained_slots(cw); slots[2]
Slot(6, 1, :horizontal, 6, ".I...W", true, true)

julia> compute_options_split(cw, slots[2], verbose=true)
- placing a black cell at (6, 1), pattern: /I...W => #options: 13
      some are ["IDRAW", "IKNEW", "IKNOW", "INDOW", "INLAW", "INLOW", "INNEW", "INTOW", "ISHOW", "ISLEW"]
- placing a black cell at (6, 3), pattern: .I/..W => #options: 23/96
      some are Left: ["AI", "BI", "CI", "DI", "EI", "GI", "HI", "II", "JI", "KI"]
      some are Right: ["ALW", "AWW", "BBW", "BMW", "BOW", "BTW", "CAW", "CCW", "CEW", "COW"]
- placing a black cell at (6, 4), pattern: .I./.W => #options: 341/8
      some are Left: ["AIA", "AIC", "AID", "AIG", "AIL", "AIM", "AIN", "AIR", "AIS", "AIT"]
      they are Right: ["AW", "BW", "EW", "IW", "KW", "NW", "OW", "SW"]
- placing a black cell at (6, 5), pattern: .I../W => #options: 1136
      some are ["AIAI", "AIBO", "AIDA", "AIDE", "AIDS", "AIDY", "AIEA", "AIGU", "AIKO", "AILE"]
source
Enigmistics.compute_options_flexible — Function
compute_options_flexible(cw::CrosswordPuzzle, s::Slot, k::Int=1; verbose=false)

Compute the number of fitting words for a slot s of the crossword cw considering its flexibility at the start and/or at the end, i.e. simulating the potential expansion of k cells in length which could happen by enlarging the grid.

Return a tuple (n_options, candidates), where n_options is a dictionary mapping the flexibility simulated (increment at the start and/or at the end) to the number of fitting words, and candidates is a dictionary mapping that same key to the list of fitting words.

Examples

julia> cw = example_crossword(type="partial")
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ ⋅  I  ⋅  ⋅  ⋅  W │
  └──────────────────┘

julia> slots = find_constrained_slots(cw); slots[2]
Slot(6, 1, :horizontal, 6, ".I...W", true, true)

julia> compute_options_flexible(cw, slots[2], 1, verbose=true)
- flexible start/end, increment: (0, 1) => pattern .I...W., length: 7 => #options: 43
      some are ["AIMDOWN", "BIGNEWS", "BIGTOWN", "BIGYAWN", "BILLOWS", "BILLOWY", "DIALTWO", "DIDNTWE", "DIEDOWN", "DIGDOWN"]
- flexible start/end, increment: (1, 0) => pattern ..I...W, length: 7 => #options: 15
      some are ["AWILLOW", "BRISTOW", "DOITNOW", "EXITROW", "HAIRBOW", "LAIDLOW", "LAINLOW", "RAINBOW", "SKIDROW", "SKILSAW"]

julia> compute_options_flexible(cw, slots[2], 2, verbose=true)
- flexible start/end, increment: (0, 2) => pattern .I...W.., length: 8 => #options: 59
      some are ["AIRPOWER", "AISLEWAY", "AIWEIWEI", "BIDEAWEE", "BILLOWED", "BILLOWUP", "CIVILWAR", "DIEDAWAY", "DIESAWAY", "DIRTYWAR"]
- flexible start/end, increment: (1, 1) => pattern ..I...W., length: 8 => #options: 35
      some are ["BOILDOWN", "CHICHEWA", "CHIPBOWL", "CHIPPEWA", "EDITDOWN", "EXITROWS", "FAIRLAWN", "GOINDOWN", "HAILDOWN", "HAIRBOWS"]
- flexible start/end, increment: (2, 0) => pattern ...I...W, length: 8 => #options: 19
      some are ["ALLIKNOW", "BASICLAW", "BUYITNOW", "BYWINDOW", "CAPITALW", "CHAINSAW", "CIVILLAW", "DAVIDLOW", "DIPITLOW", "GETITNOW"]
source
Enigmistics.fitting_words — Function
fitting_words(pattern::Regex, min_len::Int, max_len::Int)
fitting_words(pattern::String, min_len::Int, max_len::Int)

Given a pattern and a range of word lengths, return a dictionary mapping each length to the list of matching words having that pattern and length.

Examples

julia> pattern="^pe.*ce$"
"^pe.*ce$"

julia> fitting_words(pattern, 5, 8)
Dict{Int64, Vector{String}} with 4 entries:
  5 => ["peace", "pence"]
  6 => ["pearce"]
  7 => ["penance", "pentace", "pentice"]
  8 => ["perforce"]

julia> set_dictionary("it");

julia> fitting_words(pattern, 5, 8)
Dict{Int64, Vector{String}} with 4 entries:
  5 => ["pence", "pesce"]
  6 => ["pedace", "pedice", "penice"]
  7 => ["pendice", "pennace", "perisce", "pernice"]
  8 => ["pellacce", "pellicce", "pennucce", "pezzacce"]
source

Dictionary

Enigmistics.set_dictionary — Function
set_dictionary(language="en")

Load the dictionary associated to the specified language.

Current supported languages are:

  • "en", english
  • "it", italian
source

Moves

Enigmistics.SplitAndPlace — Type
SplitAndPlace <: Move

A move corresponding to the placement of a black cell in a slot and one or two words in the resulting sub-slots.

source
Enigmistics.apply! — Function
apply!(cw::CrosswordPuzzle, m::Place)
undo!(cw::CrosswordPuzzle, m::Place)

Apply/undo a move of type Place.

Example

julia> cw = example_crossword(type="partial")
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ ⋅  I  ⋅  ⋅  ⋅  W │
  └──────────────────┘

julia> slot = find_constrained_slots(cw)[2]
Slot(6, 1, :horizontal, 6, ".I...W", true, true)

julia> out = generate_moves(cw, slot, allow_split=true, allow_enlarge=true);

julia> out[1]
Place(Slot(6, 1, :horizontal, 6, ".I...W", true, true), "BILLOW")

julia> apply!(cw, out[1])
true

julia> cw
    1  2  3  4  5  6
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ B  I  L  L  O  W │
  └──────────────────┘

julia> undo!(cw, out[1])
true

julia> cw
    1  2  3  4  5  6
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ ⋅  I  ⋅  ⋅  ⋅  W │
  └──────────────────┘
source
apply!(cw::CrosswordPuzzle, m::SplitAndPlace)
undo!(cw::CrosswordPuzzle, m::SplitAndPlace)

Apply/undo a move of type SplitAndPlace.

Example

julia> cw = example_crossword(type="partial")
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ ⋅  I  ⋅  ⋅  ⋅  W │
  └──────────────────┘

julia> slot = find_constrained_slots(cw)[2]
Slot(6, 1, :horizontal, 6, ".I...W", true, true)

julia> out = generate_moves(cw, slot, allow_split=true, allow_enlarge=true);

julia> out[1000]
SplitAndPlace(Slot(6, 1, :horizontal, 6, ".I...W", true, true), 4, "BIM", "XW")

julia> apply!(cw, out[1000])
true

julia> cw
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ B  I  M  ■  X  W │
  └──────────────────┘

julia> undo!(cw, out[1000])
true

julia> cw
    1  2  3  4  5  6
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ ⋅  I  ⋅  ⋅  ⋅  W │
  └──────────────────┘
source
apply!(cw::CrosswordPuzzle, m::EnlargeAndPlace)
undo!(cw::CrosswordPuzzle, m::EnlargeAndPlace)

Apply/undo a move of type EnlargeAndPlace.

Example

julia> cw = example_crossword(type="partial")
    1  2  3  4  5  6 
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ ⋅  I  ⋅  ⋅  ⋅  W │
  └──────────────────┘

julia> slot = find_constrained_slots(cw)[2]
Slot(6, 1, :horizontal, 6, ".I...W", true, true)

julia> out = generate_moves(cw, slot, allow_split=true, allow_enlarge=true);

julia> out[end]
EnlargeAndPlace(Slot(6, 1, :horizontal, 6, ".I...W", true, true), "WHIPSAW", 1, 0)

julia> apply!(cw, out[end])
true

julia> cw
    1  2  3  4  5  6  7
  ┌─────────────────────┐
1 │ ■  G  O  L  D  E  N │
2 │ ■  A  N  ■  ⋅  ■  A │
3 │ ⋅  T  ■  ⋅  ⋅  ⋅  R │
4 │ ■  E  V  E  R  ■  R │
5 │ ⋅  ■  I  E  ■  ■  O │
6 │ W  H  I  P  S  A  W │
  └─────────────────────┘

julia> undo!(cw, out[end])
true

julia> cw
    1  2  3  4  5  6
  ┌──────────────────┐
1 │ G  O  L  D  E  N │
2 │ A  N  ■  ⋅  ■  A │
3 │ T  ■  ⋅  ⋅  ⋅  R │
4 │ E  V  E  R  ■  R │
5 │ ■  I  E  ■  ■  O │
6 │ ⋅  I  ⋅  ⋅  ⋅  W │
  └──────────────────┘
source

Algorithms

Enigmistics.solve! — Function
solve!(cw::CrosswordPuzzle; seed=rand(Int), kwargs...)

Fill a crossword puzzle cw using a backtracking algorithm with Minimum Remaining Values (MRV) heuristic, considering all types of moves (simple placements, splits with black cells, enlargements).

Arguments:

  • max_trials_per_slot=10: maximum number of candidate words to try for each slot. It gets scaled as the completeness of the grid increases to allow more trials towards the end of the search, when the grid is almost full and therefore also more constrained
  • min_options_to_allow_split=5: if a slot has more than this number of candidate words with the simple method, then we do not consider moves involving splits with black cells when filling that slot
  • min_options_to_allow_enlarge=0: if a slot has more than this number of candidate words with the simple method, then we do not consider moves involving enlarging the grid when filling that slot
  • max_enlarge=1: maximum number of cells by which to enlarge the grid when considering moves of type EnlargeAndPlace
  • verbose=true: print the completeness percentage of the grid during the search (useful also for allowing interrupts through ctrl+c)
  • see_evolution=false: display the status of the grid at each step of the algorithm, therefore allowing to see the grid filling in real time (note: this option will likely produce a slower execution time)

Example

julia> cw = random_pattern(10,14)
     1  2  3  4  5  6  7  8  9 10 11 12 13 14 
   ┌──────────────────────────────────────────┐
 1 │ ■  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ■  ⋅  ⋅ │
 2 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ⋅ │
 3 │ ⋅  ⋅  ⋅  ⋅  ⋅  ■  ⋅  ■  ■  ⋅  ⋅  ⋅  ⋅  ⋅ │
 4 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 5 │ ⋅  ■  ■  ⋅  ■  ⋅  ⋅  ■  ⋅  ⋅  ■  ⋅  ⋅  ⋅ │
 6 │ ⋅  ⋅  ⋅  ■  ⋅  ⋅  ■  ⋅  ⋅  ■  ⋅  ■  ■  ⋅ │
 7 │ ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
 8 │ ⋅  ⋅  ⋅  ⋅  ⋅  ■  ■  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅ │
 9 │ ⋅  ⋅  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅ │
10 │ ⋅  ⋅  ■  ■  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ⋅  ■  ■ │
   └──────────────────────────────────────────┘

julia> solve!(cw, min_options_to_allow_split=0)
true

julia> cw
     1  2  3  4  5  6  7  8  9 10 11 12 13 14 
   ┌──────────────────────────────────────────┐
 1 │ ■  ■  C  A  R  A  C  A  R  A  ■  ■  O  W │
 2 │ B  L  U  E  C  U  R  A  C  A  O  ■  S  R │
 3 │ L  A  R  I  D  ■  E  ■  ■  S  W  A  M  I │
 4 │ I  M  N  O  T  F  E  E  L  I  N  G  I  T │
 5 │ N  ■  ■  U  ■  C  K  ■  A  N  ■  U  N  E │
 6 │ D  K  S  ■  A  K  ■  N  R  ■  A  ■  ■  A │
 7 │ S  C  R  A  T  C  H  A  N  D  C  L  A  W │
 8 │ I  A  I  N  T  ■  ■  I  ■  A  E  C  I  A │
 9 │ D  M  ■  C  A  T  A  R  R  H  A  L  L  Y │
10 │ E  P  ■  ■  R  E  D  N  O  S  E  S  ■  ■ │
   └──────────────────────────────────────────┘
source