Table of Contents

Classic crossword puzzles have the following properties:
Clues are listed separately and organized in an across- and a down-list.
Numbered fields are indicating clues.
Words are separated by blocks, here they are black.
Size is arbitrary.

Swedish style crossword puzzles are also called clues-in-squares crossword puzzles. They are very popular in many countries.
Clues are placed in the crossword puzzle.
Arrows are indicating directions of the words.
Somethimes a field can contain up to two clues.

In these crossword puzzles, bars are used to separate words in the puzzle instead of blocks.
In the USA, symmetric crossword puzzles are very popular. They are sub-class of the classic puzzles with additional properties.

The symmetric crossword puzzles have the following properties:
The puzzle is squared and the dimension is of 15x15, 17x17, 19x19, 21x21 and 23x23 of size.
Blocks are arranged symmetrically.
Shortest words are of length 3.