PlaySudoku.us
Medium · Puzzle #952
2
8
1
2
6
3
9
4
7
3
8
2
6
3
6
1
7
8
8
2
7
5
3
7
9
3
2
4
3
4
2
7
2
3
5
"The reading of all good books is like a conversation with the finest minds of past centuries." — René Descartes
"The reading of all good books is like a conversation with the finest minds of past centuries." — René Descartes
The Swordfish technique extends X-Wing to three rows and three columns — rare but decisive on expert grids.
The Swordfish technique extends X-Wing to three rows and three columns — rare but decisive on expert grids.