Solution for Evil Sudoku #1218729536475
8
3
2
5
4
3
8
7
9
4
2
2
6
3
8
1
9
5
8
3
1
6
7
5
4
This Sudoku Puzzle has 61 steps and it is solved using Naked Single, Hidden Single, Locked Candidates Type 1 (Pointing), Full House, Naked Pair techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 9 / Column 6 → 9 (Naked Single)
- Row 8 / Column 6 → 1 (Naked Single)
- Row 3 / Column 6 → 4 (Naked Single)
- Row 3 / Column 5 → 1 (Naked Single)
- Row 1 / Column 5 → 7 (Hidden Single)
- Row 4 / Column 5 → 9 (Naked Single)
- Row 4 / Column 4 → 1 (Naked Single)
- Row 6 / Column 4 → 8 (Naked Single)
- Row 6 / Column 5 → 4 (Naked Single)
- Row 7 / Column 4 → 3 (Naked Single)
- Locked Candidates Type 1 (Pointing): 1 in b3 => r2c12<>1
- Locked Candidates Type 1 (Pointing): 2 in b3 => r4789c8<>2
- Row 4 / Column 9 → 2 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 4 in b7 => r8c89<>4
- Row 8 / Column 9 → 6 (Naked Single)
- Row 8 / Column 3 → 4 (Naked Single)
- Row 8 / Column 1 → 2 (Naked Single)
- Row 7 / Column 2 → 7 (Naked Single)
- Row 9 / Column 2 → 6 (Full House)
- Row 7 / Column 8 → 4 (Naked Single)
- Row 2 / Column 1 → 4 (Hidden Single)
- Row 5 / Column 9 → 4 (Hidden Single)
- Row 2 / Column 3 → 7 (Hidden Single)
- Naked Pair: 6,9 in r1c34 => r1c18<>6, r1c2<>9
- Naked Pair: 5,7 in r6c69 => r6c127<>5, r6c1<>7
- Row 6 / Column 1 → 6 (Naked Single)
- Row 3 / Column 1 → 8 (Naked Single)
- Row 4 / Column 3 → 3 (Naked Single)
- Row 3 / Column 3 → 6 (Naked Single)
- Row 6 / Column 2 → 9 (Naked Single)
- Row 1 / Column 3 → 9 (Naked Single)
- Row 5 / Column 3 → 8 (Full House)
- Row 3 / Column 8 → 2 (Naked Single)
- Row 3 / Column 2 → 3 (Full House)
- Row 2 / Column 2 → 5 (Naked Single)
- Row 6 / Column 7 → 3 (Naked Single)
- Row 1 / Column 4 → 6 (Naked Single)
- Row 2 / Column 4 → 9 (Full House)
- Row 1 / Column 8 → 5 (Naked Single)
- Row 1 / Column 1 → 1 (Naked Single)
- Row 1 / Column 2 → 2 (Full House)
- Row 5 / Column 2 → 1 (Full House)
- Row 2 / Column 9 → 1 (Naked Single)
- Row 2 / Column 7 → 6 (Full House)
- Row 8 / Column 7 → 9 (Naked Single)
- Row 8 / Column 8 → 3 (Full House)
- Row 9 / Column 8 → 7 (Naked Single)
- Row 7 / Column 9 → 8 (Naked Single)
- Row 5 / Column 7 → 5 (Naked Single)
- Row 4 / Column 8 → 6 (Naked Single)
- Row 5 / Column 8 → 9 (Full House)
- Row 5 / Column 1 → 7 (Full House)
- Row 6 / Column 9 → 7 (Full House)
- Row 9 / Column 9 → 5 (Full House)
- Row 4 / Column 1 → 5 (Full House)
- Row 6 / Column 6 → 5 (Full House)
- Row 4 / Column 6 → 7 (Full House)
- Row 7 / Column 5 → 2 (Naked Single)
- Row 7 / Column 7 → 1 (Full House)
- Row 9 / Column 7 → 2 (Full House)
- Row 9 / Column 5 → 8 (Full House)
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