1
8
4
3
6
8
2
1
4
6
7
3
2
1
9
4
7
2
3
4
1
5
9
6

This Sudoku Puzzle has 4 steps and it is solved using Locked Candidates Type 1 (Pointing), Hidden Rectangle, Give Up techniques.

Locked Candidates Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Locked Candidates Type 1 (Pointing): 4 in b5 => r5c789<>4
  2. Locked Candidates Type 1 (Pointing): 6 in b5 => r78c5<>6
  3. Hidden Rectangle: 6/9 in r7c16,r8c16 => r7c6<>9
  4. Give Up: Don't know how to proceed!
Show More...