Solution for Evil Sudoku #1417864932543
9
3
4
8
9
5
3
6
5
7
3
4
9
6
3
8
1
2
6
4
1
5
2
7
3
6
4
This Sudoku Puzzle has 60 steps and it is solved using Naked Single, Hidden Single, Full House, Locked Candidates Type 1 (Pointing), undefined, Naked Pair, Empty Rectangle techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 4 / Column 8 → 4 (Naked Single)
- Row 4 / Column 7 → 3 (Naked Single)
- Row 2 / Column 5 → 3 (Hidden Single)
- Row 4 / Column 2 → 6 (Hidden Single)
- Row 6 / Column 5 → 5 (Hidden Single)
- Row 2 / Column 2 → 4 (Hidden Single)
- Row 6 / Column 3 → 1 (Hidden Single)
- Row 6 / Column 4 → 7 (Naked Single)
- Row 5 / Column 4 → 4 (Naked Single)
- Row 6 / Column 8 → 9 (Naked Single)
- Row 6 / Column 2 → 8 (Full House)
- Row 7 / Column 4 → 1 (Naked Single)
- Row 1 / Column 4 → 6 (Full House)
- Row 9 / Column 6 → 6 (Hidden Single)
- Row 3 / Column 9 → 4 (Hidden Single)
- Row 7 / Column 5 → 4 (Hidden Single)
- Row 8 / Column 1 → 6 (Hidden Single)
- Row 5 / Column 6 → 8 (Hidden Single)
- Row 3 / Column 3 → 6 (Hidden Single)
- Row 3 / Column 7 → 9 (Hidden Single)
- Row 8 / Column 9 → 3 (Hidden Single)
- Row 7 / Column 1 → 3 (Hidden Single)
- Row 8 / Column 8 → 1 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 8 in b1 => r9c1<>8
- X-Wing: 5 c27 r18 => r1c9<>5
- X-Wing: 7 c27 r17 => r1c159,r7c9<>7
- Row 3 / Column 5 → 7 (Hidden Single)
- Naked Pair: 1,2 in r1c59 => r1c1<>1, r1c12<>2
- Row 1 / Column 1 → 8 (Naked Single)
- Row 3 / Column 8 → 8 (Hidden Single)
- Empty Rectangle: 2 in b1 (r29c8) => r9c1<>2
- XY-Wing: 5/9/7 in r18c2,r9c1 => r2c1,r7c2<>7
- Row 9 / Column 1 → 7 (Hidden Single)
- Row 1 / Column 2 → 7 (Hidden Single)
- Row 1 / Column 7 → 5 (Naked Single)
- Row 8 / Column 7 → 8 (Naked Single)
- Row 7 / Column 7 → 7 (Full House)
- Row 8 / Column 5 → 9 (Naked Single)
- Row 8 / Column 2 → 5 (Full House)
- Row 9 / Column 5 → 8 (Full House)
- Row 9 / Column 3 → 2 (Naked Single)
- Row 2 / Column 3 → 5 (Naked Single)
- Row 7 / Column 3 → 8 (Full House)
- Row 7 / Column 2 → 9 (Full House)
- Row 5 / Column 2 → 2 (Full House)
- Row 7 / Column 9 → 2 (Full House)
- Row 5 / Column 1 → 9 (Full House)
- Row 9 / Column 8 → 5 (Naked Single)
- Row 9 / Column 9 → 9 (Full House)
- Row 1 / Column 9 → 1 (Naked Single)
- Row 1 / Column 5 → 2 (Full House)
- Row 3 / Column 6 → 1 (Full House)
- Row 4 / Column 5 → 1 (Full House)
- Row 3 / Column 1 → 2 (Full House)
- Row 4 / Column 6 → 2 (Full House)
- Row 2 / Column 1 → 1 (Full House)
- Row 5 / Column 8 → 7 (Naked Single)
- Row 2 / Column 8 → 2 (Full House)
- Row 2 / Column 9 → 7 (Full House)
- Row 5 / Column 9 → 5 (Full House)
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