#206

- Code: Select all
`*-----------*`

|...|.3.|.7.|

|.2.|...|8..|

|.1.|...|...|

|---+---+---|

|3..|.6.|2..|

|2..|1..|5..|

|7.4|...|...|

|---+---+---|

|6..|...|.4.|

|...|2.5|...|

|...|8..|...|

*-----------*

"descrambling" (1=1, 2=6, 3=5, 4=7, 5=2, 6=8, 7=3, 8=4, 9=9, rotate 90 and move around boxes and columns) gives:

- Code: Select all
`*-----------*`

|4..|...|26.|

|.3.|.7.|...|

|...|...|...|

|---+---+---|

|...|.8.|653|

|6.1|...|...|

|...|...|..7|

|---+---+---|

|...|6.4|1..|

|.5.|...|.8.|

|...|2..|...|

*-----------*

#163

- Code: Select all
`*-----------*`

|4..|...|26.|

|.3.|.7.|...|

|...|...|...|

|---+---+---|

|...|.8.|.53|

|6.1|...|8..|

|...|...|..7|

|---+---+---|

|...|6.4|1..|

|.5.|...|.8.|

|...|2..|...|

*-----------*

I compared these puzzles in Simple Sudoku. SS used singles, locked candidates, subsets and one XY-wing in both, then got stuck in exactly the same place. (Puzzle can then be solved with a BUG-lite.)

Is this very common in the list? If it is, what's the point in testing your solvers against a list with many puzzles that essentially are the same puzzle? I've had this same feeling many times earlier also, but never taken the time to prove it, so I believe this is not the only case.

just wondering

RW

PS. Sorry if I posted this question in the wrong place, but I haven't been able to find out who made the list to address the question directly.