udosuk wrote:does anyone know of a puzzle which when loaded to Simple Sudoku and asked it to solve itself using the F11 key would actually bring up a "hidden quad" move? Note that it's dual subset must be a "naked quint" otherwise the naked dual subset will be used instead. Anyone?

There is this puzzle with a hidden quad in my benchmark list:

- Code: Select all
`. . .|. . 5|. . 4`

. . .|. . .|9 1 .

. . .|9 . .|. 3 8

-----+-----+-----

. . .|3 . 4|5 . 7

. 7 .|. 8 .|. 6 .

8 . 3|5 . 2|. . .

-----+-----+-----

4 9 .|. . 3|. . .

. 2 5|. . .|. . .

6 . .|7 . .|. . .

When it reaches the point where the Hidden Quad could be made, Simple Sudoku uses Simple Colors instead.

In these puzzles, SS prefers an XY-Wing:

400207003000613000007000600790000048060000090830000065002000800000974000600102004

040069752000000009000520004000000600601807900059000030230000000806000000007000100

But here is the one you wanted:

- Code: Select all
`. 5 3|1 . .|. . 4`

. 6 .|. . 5|. . 8

. . 8|2 . .|. . 3

-----+-----+-----

. . .|. . .|. . .

. 2 5|8 . .|. 9 .

7 . .|. . 1|. 6 .

-----+-----+-----

. 3 2|. . .|. . .

. . 4|7 8 .|. . 6

. . .|. . .|. 8 1

However, it does a Multi-Colors move

before the hidden quad.

Ruud