SuDoKu-Cracker - Help [ Levels of difficulty ]

The SuDoKu-Cracker creates only high-quality puzzles with one solution. Each level is based on certain criteria, for example, to solve a Very Hard puzzle, you need to understand the basic of the solving technique Colors.
This strength differentiate it from most common generators.

Solving Technique (Hint) / Levels of difficulty

	Very Easy	Easy	Middle	Hard	Very Hard	Expert	Super Sudoku
Hidden Single	>= 7
Naked Pairs	-	X
Hidden Pairs	-	X	>= 5
Locked Candidates	-	-	X	>= 3
X-Wing	-	-	-	X
Swordfish	-	-	-	X
Naked Triples	-	-	-	X
Hidden Triples	-	-	-	X
Jellyfish ¹⁾	-	-	-	-	X
Colors ¹⁾	-	-	-	-	X
Multiple Colors ¹⁾	-	-	-	-	-	X
No Hint ²⁾	-	-	-	-	-	-	X

¹⁾ Naked Quads , Hidden Quads and XY-Wing may also occur
²⁾ require trial and error to solve

Examples:
 IF (Hidden Pairs >= 5) OR (Locked Candidates = 1) OR (Locked Candidates = 2)
   -> Level = Middle
 IF (Locked Candidates >= 3) OR (X-Wing >= 1) OR (Swordfish >= 1)
     OR (Naked Triples >= 1) OR (Hidden Triples >= 1)
   -> Level = Hard

Tip:
· Click on

Info... (next to Check-button) or press <F3> to see which solving techniques has to be used.

Elapsed time creating puzzles
(500 tables was created for each level on a Pentium 4 2,8 GHz).

	Average	Maximum
Very Easy	< 1 sec	1 sec
Easy	< 1 sec	4 sec
Middle	1 sec	10 sec
Hard	3 sec	30 sec
Very Hard	2 sec	25 sec
Expert	4 sec	35 sec
Super Sudoku	2 sec	15 sec

SuDoKu-Cracker - Levels of difficulty