Solving Script
Hell 31

Hidden single 2 in row 9  (r9c6=2)
   r3c6<>2
   r9c6<>1
   r9c6<>4
   r9c6<>5
   r9c6<>8
Hidden single 9 in col 1  (r1c1=9)
   r1c1<>4
   r1c1<>6
   r1c5<>9
   r1c7<>9
   r1c9<>9
Hidden single 7 in col 5  (r5c5=7)
   r5c1<>7
   r5c2<>7
   r5c3<>7
   r5c5<>4
   r5c5<>5
   r5c5<>9
   r5c7<>7
Hidden single 9 in row 5  (r5c7=9)
   r2c7<>9
   r5c7<>1
   r5c7<>4
   r6c7<>9
   r6c9<>9
Hidden single 9 in row 2  (r2c5=9)
   r2c5<>5
   r2c5<>8
   r3c5<>9
   r3c6<>9
Hidden single 5 in row 2  (r2c4=5)
   r2c4<>2
   r4c4<>5
   r6c4<>5
   r7c4<>5
Hidden single 8 in row 2  (r2c7=8)
   r1c7<>8
   r2c7<>2
   r2c7<>3
   r4c7<>8
   r6c7<>8
Hidden single 8 in row 1  (r1c5=8)
   r1c5<>4
   r1c5<>6
   r7c5<>8
   r9c5<>8
Hidden single 3 in row 2  (r2c3=3)
   r2c3<>2
   r3c3<>3
   r4c3<>3
   r6c3<>3
Hidden single 2 in row 2  (r2c2=2)
   r1c3<>2
   r3c2<>2
   r3c3<>2
   r5c2<>2
Hidden single 2 in row 3  (r3c4=2)
   r1c4<>2
   r3c4<>1
   r3c4<>4
   r3c4<>6
Hidden single 2 in row 1  (r1c7=2)
   r1c7<>1
Hidden single 3 in row 3  (r3c8=3)
   r3c8<>1
   r7c8<>3
Hidden single 9 in row 3  (r3c9=9)
   r3c9<>1
Hidden single 1 in row 3  (r3c6=1)
   r1c4<>1
   r3c6<>4
   r7c6<>1
   r8c6<>1
Hidden single 1 in row 1  (r1c9=1)
   r4c9<>1
   r9c9<>1
Hidden single 2 in row 5  (r5c3=2)
   r5c3<>1
   r5c3<>4
   r5c3<>5
Hidden single 9 in row 6  (r6c6=9)
   r6c6<>4
   r6c6<>5
Hidden single 1 in col 4  (r7c4=1)
   r7c2<>1
   r7c4<>3
   r7c4<>4
   r7c4<>6
   r7c7<>1
   r7c8<>1
Hidden single 6 in col 4  (r1c4=6)
   r1c3<>6
   r1c4<>4
   r3c5<>6
Hidden single 4 in row 1  (r1c3=4)
   r3c2<>4
   r3c3<>4
   r4c3<>4
   r6c3<>4
   r8c3<>4
   r9c3<>4
Hidden single 4 in row 3  (r3c5=4)
   r7c5<>4
   r8c5<>4
   r9c5<>4
Hidden single 8 in col 6  (r7c6=8)
   r7c2<>8
   r7c6<>4
   r7c6<>5
Hidden single 8 in col 8  (r4c8=8)
   r4c3<>8
   r4c8<>1
   r4c8<>4
   r4c8<>5
Hidden single 5 in box 5  (r4c6=5)
   r4c1<>5
   r4c3<>5
   r4c6<>4
   r4c9<>5
   r8c6<>5
Hidden single 4 in col 6  (r8c6=4)
   r8c7<>4
   r8c8<>4
Locked candidate (7) in box 9
   r4c7<>7
   r6c7<>7
UR4-------- 44 61 slash 4 pair = 34 
   r4c1<>4
   r6c1<>4
ER_Row1 = 4 Row2 = 9 col1 = 3 col2 = 7 digit = 1 target = 97 hinge = 93
   r9c7<>1
Hidden double row 9 - 18
   r8c3<>1
   r9c2<>4
   r9c2<>6
   r9c3<>5
   r9c3<>6
ER_Row1 = 9 Row2 = 5 col1 = 7 col2 = 1 digit = 4 target = 51 hinge = 57
   r5c1<>4
Naked single 5 row 5 column 1  (r5c1=5)
   r5c8<>5
   r6c1<>5
   r6c3<>5
   r7c1<>5
   r9c1<>5
Hidden single 5 in row 6  (r6c9=5)
   r6c9<>6
   r6c9<>7
   r9c9<>5
Hidden single 5 in row 9  (r9c5=5)
   r7c5<>5
   r8c5<>5
   r9c5<>3
   r9c5<>6
Hidden single 5 in row 7  (r7c8=5)
   r7c8<>4
   r8c8<>5
Hidden single 5 in row 8  (r8c3=5)
   r8c3<>6
   r8c3<>7
Hidden single 7 in row 8  (r8c7=7)
   r7c7<>7
   r8c7<>1
   r8c7<>6
Hidden single 1 in row 8  (r8c8=1)
   r5c8<>1
Hidden single 1 in row 5  (r5c2=1)
   r4c3<>1
   r5c2<>4
   r9c2<>1
Hidden single 1 in row 4  (r4c7=1)
   r4c7<>4
   r4c7<>6
Hidden single 4 in row 4  (r4c4=4)
   r4c4<>3
   r6c4<>4
Hidden single 3 in row 4  (r4c1=3)
   r4c1<>6
   r4c1<>7
   r6c1<>3
Hidden single 4 in row 5  (r5c8=4)
   r6c7<>4
Hidden single 3 in row 6  (r6c4=3)
Hidden single 4 in row 6  (r6c2=4)
   r6c2<>6
   r6c2<>7
   r6c2<>8
   r7c2<>4
Hidden single 8 in row 6  (r6c3=8)
   r6c3<>6
   r6c3<>7
   r9c3<>8
Hidden single 7 in row 6  (r6c1=7)
   r4c3<>7
   r6c1<>6
   r7c1<>7
Hidden single 7 in row 4  (r4c9=7)
   r4c9<>6
Hidden single 6 in row 4  (r4c3=6)
   r3c3<>6
Hidden single 6 in row 3  (r3c2=6)
   r3c2<>7
   r7c2<>6
Hidden single 7 in row 3  (r3c3=7)
Hidden single 6 in row 6  (r6c7=6)
   r7c7<>6
   r9c7<>6
Hidden single 7 in row 7  (r7c2=7)
Hidden single 6 in row 8  (r8c5=6)
   r7c5<>6
Hidden single 6 in row 7  (r7c1=6)
   r7c1<>4
   r9c1<>6
Hidden single 4 in row 7  (r7c7=4)
   r7c7<>3
   r9c7<>4
Hidden single 3 in row 7  (r7c5=3)
Hidden single 1 in row 9  (r9c3=1)
Hidden single 3 in row 9  (r9c7=3)
Hidden single 4 in row 9  (r9c1=4)
Hidden single 6 in row 9  (r9c9=6)
Hidden single 8 in row 9  (r9c2=8)