.1......23....45......6..7....7...1...5.3.8...4...9.....7.5.....9.2....48......3.
9.2, Contradiction Forcing Chain: R3C2.2 on ==> R6C5.8 both on & off
9.3, Contradiction Forcing Chain: R3C6.8 on ==> R5C4.1 both on & off
9.3, Contradiction Forcing Chain: R3C4.8 on ==> R4C5.4 both on & off
9.4, Contradiction Forcing Chain: R2C2.8 on ==> R4C7.4 both on & off
9.3, Contradiction Forcing Chain: R4C2.2 on ==> R5C2.7 both on & off
9.4, Contradiction Forcing Chain: R3C6.3 on ==> R5C4.6 both on & off
9.4, Contradiction Forcing Chain: R8C6.6 on ==> R5C1.2 both on & off
9.5, Contradiction Forcing Chain: R7C1.2 on ==> R6C1.6 both on & off
9.6, Contradiction Forcing Chain: R7C4.8 on ==> R4C5.4 both on & off
9.5, Cell Forcing Chains: R5C2 ==> R2C5.8 off
9.5, Cell Forcing Chains: R5C2 ==> R6C4.1 off
9.8, Contradiction Forcing Chain: R4C7.3 on ==> R1C8.8 both on & off
9.9, Contradiction Forcing Chain: R8C6.1 on ==> R5C4.4 both on & off
9.9, Contradiction Forcing Chain: R2C5.1 on ==> R8C7.6 both on & off
9.3, Contradiction Forcing Chain: R7C4.1 on ==> R2C4.8 both on & off
9.4, Contradiction Forcing Chain: R9C4.1 on ==> R2C8.8 both on & off
9.5, Contradiction Forcing Chain: R9C6.1 on ==> R2C3.2 both on & off
9.5, Contradiction Forcing Chain: R9C3.6 on ==> R6C7.6 both on & off
9.5, Contradiction Forcing Chain: R9C2.6 on ==> R9C5.4 both on & off
9.2, Contradiction Forcing Chain: R2C3.8 on ==> R5C4.6 both on & off
9.4, Contradiction Forcing Chain: R8C8.6 on ==> R6C7.6 both on & off
9.2, Region Forcing Chains: 5 in row ==> R3C3.8 off
9.3, Cell Forcing Chains: R8C1 ==> R8C3.6 off
9.0, Contradiction Forcing Chain: R1C1.6 on ==> R3C1.5 both on & off
9.3, Contradiction Forcing Chain: R3C9.8 on ==> R5C1.9 both on & off
1.5, Hidden Single: R3C2: 8 in row
1.5, Hidden Single: R9C2: 5 in column
1.2, Hidden Single: R8C8: 5 in block
2.6, Pointing: Cells R7C8,R7C9: 8 in block and row
9.0, Contradiction Forcing Chain: R6C3.2 on ==> R4C7.4 both on & off
9.1, Contradiction Forcing Chain: R7C1.6 on ==> R6C1.2 both on & off
9.1, Region Forcing Chains: 6 in row ==> R6C1.6 off
9.1, Contradiction Forcing Chain: R1C1.4 on ==> R6C7.7 both on & off
9.2, Contradiction Forcing Chain: R6C3.6 on ==> R1C3.4 both on & off
9.1, Contradiction Forcing Chain: R5C9.6 on ==> R8C6.8 both on & off
9.2, Contradiction Forcing Chain: R5C1.6 on ==> R6C8.2 both on & off
9.2, Region Forcing Chains: 2 in column ==> R4C9.3 off
2.6, Pointing: Cells R6C7,R6C9: 3 in block and row
9.2, Contradiction Forcing Chain: R1C4.5 on ==> R1C8.4 both on & off
9.2, Contradiction Forcing Chain: R2C2.6 on ==> R8C5.1 both on & off
2.6, Pointing: Cells R1C3,R2C3: 6 in block and column
9.2, Contradiction Forcing Chain: R5C8.6 on ==> R3C1.2 both on & off
9.2, Contradiction Forcing Chain: R7C1.1 on ==> R9C9.1 both on & off
2.3, Naked Single: R7C1: 4
9.0, Contradiction Forcing Chain: R6C4.8 on ==> R2C2.2 both on & off
2.8, Claiming: Cells R1C4,R2C4: 8 in column and block
9.0, Region Forcing Chains: 5 in block ==> R4C9.9 off
8.8, Contradiction Forcing Chain: R4C7.6 on ==> R6C4.5 both on & off
8.9, Contradiction Forcing Chain: R3C3.2 on ==> R4C3.9 both on & off
9.0, Contradiction Forcing Chain: R8C6.7 on ==> R8C1.6 both on & off
8.9, Contradiction Forcing Chain: R8C7.1 on ==> R1C6.3 both on & off
8.9, Cell Forcing Chains: R8C7 ==> R6C7.7 off
2.6, Pointing: Cells R5C9,R6C9: 7 in block and column
8.9, Cell Forcing Chains: R9C3 ==> R4C3.2 off
7.8, Nishio Forcing Chain: R5C6.2 on ==> R9C3.2 both on & off
8.3, Region Forcing Chains: 5 in column ==> R3C6.1 off
2.6, Pointing: Cells R2C4,R3C4: 1 in block and column
8.4, Region Forcing Chains: 1 in column ==> R6C9.5 off
1.2, Hidden Single: R4C9: 5 in block
1.2, Hidden Single: R6C4: 5 in block
3.4, Hidden Pair: Cells R3C1,R3C6: 2,5 in row
8.5, Cell Forcing Chains: R7C2 ==> R1C6.3 off
2.6, Pointing: Cells R1C4,R3C4: 3 in block and column
3.6, Naked Triplet: Cells R5C4,R7C4,R9C4: 4,6,9 in column
2.6, Pointing: Cells R1C5,R2C5: 9 in block and column
3.6, Naked Triplet: Cells R1C1,R1C5,R1C6: 5,7,9 in row
8.3, Cell Forcing Chains: R6C7 ==> R5C8.2 off
2.8, Claiming: Cells R5C1,R5C2: 2 in row and block
4.2, XY-Wing: Cells R5C4,R5C8,R7C4 on value 9
7.2, Forcing Chain: R1C1.9 off
1.5, Hidden Single: R1C5: 9 in row
2.6, Pointing: Cells R2C3,R3C3: 9 in block and column
2.5, Direct Hidden Triplet: Cells R1C3,R2C3,R3C3: 4,6,9 in column
2.6, Pointing: Cells R8C1,R8C3: 1 in block and row
3.0, Naked Pair: Cells R4C2,R7C2: 3,6 in column
2.6, Pointing: Cells R4C1,R4C2: 6 in block and row
7.0, Bidirectional Cycle: R8C3,R8C6,R4C6,R4C3
7.1, Bidirectional Cycle: R2C3,R2C8,R5C8,R1C8,R1C3
7.1, Bidirectional Cycle: R3C6,R4C6,R6C5,R8C5,R2C5
7.1, Forcing Chain: R3C7.3 off
7.2, Bidirectional Cycle: R2C5,R8C5,R6C5,R6C3,R6C1,R1C1,R1C6
1.5, Hidden Single: R5C6: 1 in row
1.2, Hidden Single: R5C4: 6 in block
1.2, Hidden Single: R4C5: 4 in block
1.2, Hidden Single: R5C8: 4 in block
1.2, Hidden Single: R3C7: 4 in block
1.2, Hidden Single: R1C3: 4 in block
1.2, Hidden Single: R2C3: 6 in block
1.2, Hidden Single: R3C3: 9 in block
1.2, Hidden Single: R2C8: 9 in block
1.2, Hidden Single: R9C5: 1 in block
1.2, Hidden Single: R9C4: 4 in block
1.2, Hidden Single: R7C4: 9 in block
1.5, Hidden Single: R7C7: 1 in column
1.2, Hidden Single: R7C8: 2 in block
1.2, Hidden Single: R7C9: 8 in block
1.2, Hidden Single: R1C8: 8 in block
1.0, Hidden Single: R6C8: 6 in column
1.2, Hidden Single: R2C4: 8 in block
1.2, Hidden Single: R3C4: 1 in block
1.0, Hidden Single: R1C4: 3 in column
1.2, Hidden Single: R2C9: 1 in block
1.2, Hidden Single: R3C9: 3 in block
1.0, Hidden Single: R1C7: 6 in block
1.2, Hidden Single: R6C7: 3 in block
1.2, Hidden Single: R4C7: 2 in block
1.2, Hidden Single: R6C5: 2 in block
1.0, Hidden Single: R4C6: 8 in block
1.2, Hidden Single: R3C6: 2 in block
1.0, Hidden Single: R3C1: 5 in row
1.2, Hidden Single: R2C2: 2 in block
1.0, Hidden Single: R1C1: 7 in block
1.0, Hidden Single: R1C6: 5 in row
1.0, Hidden Single: R2C5: 7 in block
1.0, Hidden Single: R8C5: 8 in column
1.2, Hidden Single: R5C1: 2 in block
1.2, Hidden Single: R5C2: 7 in block
1.0, Hidden Single: R5C9: 9 in row
1.0, Hidden Single: R6C9: 7 in block
1.0, Hidden Single: R9C9: 6 in column
1.2, Hidden Single: R6C3: 8 in block
1.0, Hidden Single: R6C1: 1 in row
1.2, Hidden Single: R4C1: 9 in block
1.0, Hidden Single: R8C1: 6 in column
1.2, Hidden Single: R4C2: 6 in block
1.0, Hidden Single: R4C3: 3 in block
1.0, Hidden Single: R7C2: 3 in column
1.0, Hidden Single: R8C3: 1 in block
1.0, Hidden Single: R7C6: 6 in row
1.2, Hidden Single: R8C6: 3 in block
1.0, Hidden Single: R9C6: 7 in block
1.0, Hidden Single: R8C7: 7 in row
1.0, Hidden Single: R9C7: 9 in block
ED=9.9/9.9/9.2