PlaySudoku.us
Easy · Puzzle #397
8
9
3
7
1
4
9
1
8
2
3
2
3
4
1
3
8
2
8
3
6
4
5
7
1
8
6
4
8
5
7
9
1
3
1
9
2
8
5
4
7
5
9
1
2
6
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.
"I have added these principles to the law: get the knights into action before both bishops are developed." — José Raúl Capablanca
"I have added these principles to the law: get the knights into action before both bishops are developed." — José Raúl Capablanca