5
6
9
2
5
8
2
9
3
7
9
8
8
6
1
5
3
4
8
1
5
7
9
4
This Sudoku Puzzle has 73 steps and it is solved using Hidden Single, Naked Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, Turbot Fish, undefined, Full House, Uniqueness Test 1 techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 3 / Column 5 → 5 (Hidden Single)
- Row 8 / Column 2 → 5 (Hidden Single)
- Row 7 / Column 9 → 5 (Hidden Single)
- Row 3 / Column 1 → 8 (Hidden Single)
- Row 1 / Column 5 → 8 (Hidden Single)
- Row 4 / Column 4 → 5 (Hidden Single)
- Row 5 / Column 3 → 5 (Hidden Single)
- Row 8 / Column 1 → 1 (Hidden Single)
- Row 7 / Column 7 → 1 (Hidden Single)
- Row 9 / Column 2 → 8 (Hidden Single)
- Row 9 / Column 9 → 6 (Naked Single)
- Row 5 / Column 9 → 4 (Naked Single)
- Row 8 / Column 8 → 8 (Hidden Single)
- Row 5 / Column 4 → 9 (Hidden Single)
- Row 4 / Column 9 → 8 (Hidden Single)
- Row 7 / Column 3 → 6 (Hidden Single)
- Row 4 / Column 7 → 9 (Hidden Single)
- Row 5 / Column 5 → 3 (Hidden Single)
- Row 8 / Column 5 → 2 (Naked Single)
- Locked Candidates Type 1 (Pointing): 1 in b4 => r12c2<>1
- Locked Candidates Type 1 (Pointing): 7 in b6 => r2c8<>7
- Locked Candidates Type 2 (Claiming): 3 in r8 => r7c6<>3
- Naked Pair: 1,7 in r3c39 => r3c6<>1, r3c6<>7
- Locked Candidates Type 1 (Pointing): 1 in b2 => r2c3<>1
- Turbot Fish: 2 r5c1 =2= r5c7 -2- r9c7 =2= r7c8 => r7c1<>2
- W-Wing: 3/6 in r2c8,r8c4 connected by 6 in r1c47 => r2c4<>3
- W-Wing: 6/3 in r2c8,r8c6 connected by 3 in r3c67 => r2c6<>6
- Row 8 / Column 6 → 6 (Hidden Single)
- Row 8 / Column 4 → 3 (Full House)
- Uniqueness Test 1: 1/7 in r1c39,r3c39 => r1c3<>1, r1c3<>7
- Row 1 / Column 3 → 2 (Naked Single)
- Row 1 / Column 9 → 1 (Hidden Single)
- Row 3 / Column 9 → 7 (Full House)
- Row 3 / Column 3 → 1 (Naked Single)
- Naked Pair: 7,9 in r9c35 => r9c1<>7
- X-Wing: 2 r59 c17 => r4c1<>2
- XY-Chain: 4 4- r6c4 -7- r6c8 -2- r7c8 -3- r7c1 -7- r7c6 -4 => r46c6<>4
- 2-String Kite: 4 in r1c1,r6c4 (connected by r4c1,r6c2) => r1c4<>4
- XY-Chain: 3 3- r3c6 -4- r7c6 -7- r7c1 -3- r7c8 -2- r9c7 -3 => r3c7<>3
- Row 3 / Column 7 → 4 (Naked Single)
- Row 3 / Column 6 → 3 (Full House)
- Locked Candidates Type 1 (Pointing): 4 in b2 => r2c2<>4
- XY-Chain: 7 7- r1c4 -6- r1c7 -3- r9c7 -2- r9c1 -3- r7c1 -7- r9c3 -9- r2c3 -7 => r1c1,r2c456<>7
- Row 1 / Column 4 → 7 (Hidden Single)
- Row 6 / Column 4 → 4 (Naked Single)
- Row 2 / Column 4 → 6 (Full House)
- Row 2 / Column 8 → 3 (Naked Single)
- Row 1 / Column 7 → 6 (Full House)
- Row 2 / Column 2 → 9 (Naked Single)
- Row 7 / Column 8 → 2 (Naked Single)
- Row 9 / Column 7 → 3 (Full House)
- Row 5 / Column 7 → 2 (Full House)
- Row 5 / Column 1 → 6 (Full House)
- Row 2 / Column 3 → 7 (Naked Single)
- Row 9 / Column 3 → 9 (Full House)
- Row 6 / Column 8 → 7 (Naked Single)
- Row 4 / Column 8 → 6 (Full House)
- Row 7 / Column 2 → 3 (Naked Single)
- Row 9 / Column 1 → 2 (Naked Single)
- Row 9 / Column 5 → 7 (Full House)
- Row 7 / Column 1 → 7 (Full House)
- Row 4 / Column 1 → 4 (Naked Single)
- Row 1 / Column 1 → 3 (Full House)
- Row 1 / Column 2 → 4 (Full House)
- Row 4 / Column 5 → 1 (Naked Single)
- Row 7 / Column 6 → 4 (Naked Single)
- Row 7 / Column 5 → 9 (Full House)
- Row 2 / Column 5 → 4 (Full House)
- Row 2 / Column 6 → 1 (Full House)
- Row 4 / Column 2 → 2 (Naked Single)
- Row 4 / Column 6 → 7 (Full House)
- Row 6 / Column 6 → 2 (Full House)
- Row 6 / Column 2 → 1 (Full House)
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