21 clues.
- Code: Select all
. . . . 3 2 9 . .
. . . 5 . . . 6 .
. . 1 7 . . . . 8
. 5 7 6 . . . . .
3 . . . 9 . . . .
2 . . . . 4 . . .
9 . . . . . 2 . .
. 6 . . . . . 5 .
. . 8 . . . . . 1
Part one :
It has 2 types of symmetry with the main diagonal :
pattern-symmetry
digits-symmetry
This puzle has exactly 2 solutions.
50 cells differ in the two solutions ; only 10 are the same.
More precisely :
Given clues : 21
Cells that differ in two solutions : 50
Cells that are the same : 10
see here.
Common cells (x) for the 2 solutions :
- Code: Select all
x . . | . 3 2 | 9 x .
. x . | 5 . x | . 6 .
. . 1 | 7 x x | . . 8
-------+-------+-------
. 5 7 | 6 . . | . . .
3 . x | . 9 . | . . .
2 x x | . . 4 | . . .
-------+-------+-------
9 . . | . . . | 2 . .
x 6 . | . . . | . 5 .
. . 8 | . . . | . . 1
6 in r1c1 can be obtained by SST
The 9 other cells (actually 5 due to the symmetry) need more advanced techniques.
Any solvers for these cells ?
JPF
