Solving Script
Hell 29

Hidden single 4 in row 9  (r9c9=4)
   r1c9<>4
   r4c9<>4
   r7c7<>4
   r7c8<>4
   r7c9<>4
   r9c9<>1
   r9c9<>3
   r9c9<>6
   r9c9<>9
Hidden single 4 in row 4  (r4c7=4)
   r1c7<>4
   r2c7<>4
   r4c7<>1
   r4c7<>6
   r4c7<>7
   r4c7<>9
Hidden single 4 in row 1  (r1c8=4)
   r1c8<>5
   r1c8<>6
   r1c8<>8
   r1c8<>9
Hidden single 4 in row 2  (r2c3=4)
   r2c3<>5
   r2c3<>6
   r2c3<>7
   r2c3<>8
Hidden single 4 in row 7  (r7c6=4)
   r7c6<>5
   r7c6<>6
   r7c6<>7
Hidden single 5 in row 7  (r7c4=5)
   r3c4<>5
   r4c4<>5
   r6c4<>5
   r7c4<>3
   r7c4<>6
Hidden single 1 in row 9  (r9c2=1)
   r9c2<>2
   r9c2<>6
Hidden single 9 in row 9  (r9c5=9)
   r4c5<>9
   r5c5<>9
   r6c5<>9
   r8c5<>9
   r9c5<>3
   r9c5<>6
Hidden single 2 in col 7  (r7c7=2)
   r7c1<>2
   r7c2<>2
   r7c7<>3
   r7c7<>6
   r7c7<>8
Hidden single 2 in col 2  (r3c2=2)
   r1c1<>2
   r3c1<>2
   r3c2<>6
   r3c2<>7
   r3c2<>9
   r3c3<>2
   r3c4<>2
Hidden single 2 in row 1  (r1c5=2)
   r1c5<>5
   r1c5<>6
   r1c5<>8
   r4c5<>2
   r6c5<>2
Hidden single 9 in col 2  (r5c2=9)
   r4c1<>9
   r5c2<>6
   r5c2<>7
   r5c7<>9
   r6c1<>9
Hidden single 5 in col 8  (r3c8=5)
   r3c1<>5
   r3c3<>5
   r3c6<>5
   r3c8<>6
   r3c8<>8
   r3c8<>9
Hidden single 7 in box 8  (r8c5=7)
   r4c5<>7
   r5c5<>7
   r6c5<>7
   r8c3<>7
   r8c5<>3
   r8c5<>6
Hidden single 3 in col 5  (r2c5=3)
   r2c5<>5
   r2c5<>6
   r2c5<>8
   r2c7<>3
   r3c4<>3
Hidden single 8 in box 2  (r3c4=8)
   r3c1<>8
   r3c3<>8
   r3c4<>1
   r3c4<>6
   r3c7<>8
   r3c9<>8
   r6c4<>8
Hidden single 1 in row 3  (r3c6=1)
   r3c6<>6
   r4c6<>1
   r6c6<>1
Hidden single 8 in col 3  (r8c3=8)
   r7c1<>8
   r8c3<>3
   r8c3<>6
   r8c7<>8
   r8c8<>8
   r8c9<>8
Naked double col 3 - 67
   r4c3<>6
   r4c3<>7
   r6c3<>6
   r6c3<>7
   r9c3<>6
Naked double col 4 - 36
   r4c4<>6
   r6c4<>6
Naked double col 6 - 56
   r4c6<>5
   r4c6<>6
   r6c6<>5
   r6c6<>6
Naked double box 1 - 67
   r1c1<>6
   r2c1<>6
   r2c1<>7
   r3c1<>6
   r3c1<>7
Naked single 9 row 3 column 1  (r3c1=9)
   r1c1<>9
   r3c7<>9
   r3c9<>9
Naked double col 1 - 58
   r4c1<>5
   r6c1<>5
ER_Row1 = 5 Row2 = 2 col1 = 3 col2 = 7 digit = 7 target = 27 hinge = 23
   r2c7<>7
Hidden single 7 in row 2  (r2c2=7)
   r2c2<>6
   r3c3<>7
   r7c2<>7
Hidden single 7 in row 7  (r7c1=7)
   r4c1<>7
   r6c1<>7
   r7c1<>3
   r7c1<>6
Hidden single 3 in row 7  (r7c9=3)
   r3c9<>3
   r7c9<>6
   r7c9<>8
   r8c7<>3
   r8c9<>3
Hidden single 3 in row 3  (r3c7=3)
   r3c7<>6
   r3c7<>7
Hidden single 7 in row 3  (r3c9=7)
   r3c9<>6
   r4c9<>7
   r6c9<>7
Hidden single 6 in row 3  (r3c3=6)
   r5c3<>6
Hidden single 7 in row 4  (r4c6=7)
   r4c6<>9
   r6c6<>7
Hidden single 9 in row 4  (r4c9=9)
   r1c9<>9
   r4c9<>1
   r4c9<>6
   r6c7<>9
   r6c8<>9
   r6c9<>9
   r8c9<>9
Hidden single 9 in row 1  (r1c7=9)
   r1c7<>6
   r1c7<>8
   r8c7<>9
Hidden single 1 in row 4  (r4c4=1)
   r4c4<>2
   r6c4<>1
Hidden single 7 in row 6  (r6c7=7)
   r5c7<>7
   r6c7<>1
   r6c7<>6
   r6c7<>8
Hidden single 7 in row 5  (r5c3=7)
Hidden single 1 in row 6  (r6c9=1)
   r6c9<>6
   r6c9<>8
   r8c9<>1
Hidden single 9 in row 6  (r6c6=9)
Hidden single 8 in row 7  (r7c8=8)
   r6c8<>8
   r7c8<>6
Hidden single 8 in row 6  (r6c5=8)
   r5c5<>8
   r6c5<>5
   r6c5<>6
Hidden single 8 in row 5  (r5c7=8)
   r2c7<>8
   r5c7<>6
Hidden single 8 in row 2  (r2c1=8)
   r1c1<>8
   r2c1<>5
Hidden single 8 in row 1  (r1c9=8)
   r1c9<>6
Hidden single 6 in row 1  (r1c6=6)
   r1c6<>5
   r2c6<>6
Hidden single 5 in row 1  (r1c1=5)
Hidden single 5 in row 2  (r2c6=5)
Hidden single 6 in row 2  (r2c7=6)
   r8c7<>6
Hidden single 6 in row 5  (r5c5=6)
   r4c5<>6
Hidden single 6 in row 4  (r4c1=6)
   r4c1<>2
   r6c1<>6
   r9c1<>6
Hidden single 2 in row 4  (r4c3=2)
   r4c3<>5
   r6c1<>2
   r6c3<>2
   r9c3<>2
Hidden single 5 in row 4  (r4c5=5)
Hidden single 2 in row 6  (r6c4=2)
Hidden single 5 in row 6  (r6c3=5)
   r6c3<>3
Hidden single 3 in row 6  (r6c1=3)
   r9c1<>3
Hidden single 6 in row 6  (r6c8=6)
   r8c8<>6
Hidden single 6 in row 7  (r7c2=6)
Hidden single 1 in row 8  (r8c7=1)
Hidden single 3 in row 8  (r8c4=3)
   r8c4<>6
   r9c4<>3
Hidden single 6 in row 8  (r8c9=6)
Hidden single 9 in row 8  (r8c8=9)
Hidden single 2 in row 9  (r9c1=2)
Hidden single 3 in row 9  (r9c3=3)
Hidden single 6 in row 9  (r9c4=6)