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

This Sudoku Puzzle has 19 steps and it is solved using Naked Single, Hidden Single, Locked Candidates Type 2 (Claiming), Grouped Discontinuous Nice Loop, undefined, Locked Candidates Type 1 (Pointing), Naked Triple, Hidden Pair, Uniqueness Test 1, Discontinuous Nice Loop, Give Up techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 8 / Column 1 → 2 (Naked Single)
  2. Row 8 / Column 9 → 4 (Naked Single)
  3. Row 8 / Column 3 → 8 (Naked Single)
  4. Row 1 / Column 4 → 8 (Hidden Single)
  5. Row 5 / Column 4 → 4 (Hidden Single)
  6. Row 1 / Column 8 → 4 (Hidden Single)
  7. Row 3 / Column 2 → 8 (Hidden Single)
  8. Row 3 / Column 3 → 7 (Hidden Single)
  9. Locked Candidates Type 2 (Claiming): 9 in c5 => r2c46,r3c4<>9
  10. Grouped Discontinuous Nice Loop: 1 r6c7 -1- r5c79 =1= r5c23 -1- r4c1 =1= r1c1 -1- r1c9 =1= r123c7 -1- r6c7 => r6c7<>1
  11. Almost Locked Set XZ-Rule: A=r2c23457 {123459}, B=r3468c4 {12579}, X=5, Z=2 => r2c6<>2
  12. Locked Candidates Type 1 (Pointing): 2 in b2 => r9c4<>2
  13. Naked Triple: 1,3,4 in r79c5,r9c4 => r79c6<>1
  14. Hidden Pair: 1,4 in r7c25 => r7c5<>3
  15. Locked Candidates Type 1 (Pointing): 3 in b8 => r9c8<>3
  16. Uniqueness Test 1: 2/8 in r7c68,r9c68 => r7c8<>2, r7c8<>8
  17. Row 7 / Column 8 → 3 (Naked Single)
  18. Discontinuous Nice Loop: 9 r6c7 -9- r5c8 -2- r9c8 -8- r6c8 =8= r6c7 => r6c7<>9
  19. Give Up: Don't know how to proceed!
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