Solving Script
Hell 25

Hidden single 4 in row 3  (r3c2=4)
   r3c2<>1
   r3c2<>6
   r3c2<>9
   r8c2<>4
   r9c2<>4
Hidden single 4 in row 5  (r5c9=4)
   r5c9<>1
   r5c9<>3
   r7c9<>4
   r8c9<>4
   r9c9<>4
Hidden single 3 in row 7  (r7c5=3)
   r4c5<>3
   r5c5<>3
   r6c5<>3
   r7c5<>1
   r7c5<>2
   r7c5<>4
   r7c5<>9
Hidden single 3 in row 5  (r5c3=3)
   r2c3<>3
   r4c2<>3
   r4c3<>3
   r5c3<>1
   r6c2<>3
   r6c3<>3
Hidden single 3 in row 6  (r6c8=3)
   r1c8<>3
   r2c8<>3
   r4c8<>3
   r4c9<>3
   r6c8<>1
   r6c8<>7
   r6c8<>8
   r6c8<>9
Hidden single 3 in row 2  (r2c2=3)
   r1c2<>3
   r2c2<>5
   r2c2<>6
Hidden single 3 in row 1  (r1c9=3)
   r1c9<>1
   r1c9<>6
   r1c9<>7
   r1c9<>8
Hidden single 3 in row 4  (r4c4=3)
   r4c4<>2
   r4c4<>9
Hidden single 7 in col 1  (r7c1=7)
   r7c1<>1
   r7c1<>2
   r7c8<>7
   r7c9<>7
Hidden single 4 in col 3  (r7c3=4)
   r7c3<>1
   r7c8<>4
Hidden single 5 in col 9  (r4c9=5)
   r4c2<>5
   r4c9<>1
   r4c9<>7
   r4c9<>8
Hidden single 7 in col 9  (r8c9=7)
   r8c7<>7
   r8c8<>7
   r8c9<>1
   r8c9<>6
   r8c9<>8
Naked single 1 row 7 column 9  (r7c9=1)
   r3c9<>1
   r7c6<>1
   r7c8<>1
   r8c7<>1
   r8c8<>1
   r9c8<>1
   r9c9<>1
Locked candidate (2) in box 5
   r2c5<>2
   r3c5<>2
   r8c5<>2
   r9c5<>2
Locked candidate (9) in column 7
   r4c8<>9
Locked candidate (1) in col 3
   r4c2<>1
   r5c1<>1
   r6c1<>1
   r6c2<>1
Naked double box 4 - 29
   r6c1<>9
   r6c2<>9
Locked candidate (9) in col 4
   r1c5<>9
   r3c5<>9
Naked double row 3 - 68
   r3c1<>6
   r3c1<>8
   r3c4<>8
   r3c7<>6
   r3c7<>8
X-wing of 2's  (r27 c68)
   r8c6<>2
   r8c8<>2
   r9c6<>2
   r9c8<>2
X-Loop of 2's in box 8 box 9
   r8c2<>2
HR(hidden rectangle) 88 95 digit = 8
   r9c5<>8
Locked candidate (8) in box 8
   r8c7<>8
   r8c8<>8
Naked single 4 row 8 column 8  (r8c8=4)
   r8c5<>4
   r9c8<>4
Hidden single 4 in row 9  (r9c5=4)
   r9c5<>1
   r9c5<>9
Locked candidate (9) in column 5
   r6c6<>9
XY-Chain 14 31 digit = 9
   r1c1<>9
   r1c2<>9
   r3c4<>9
Hidden single 9 in row 1  (r1c4=9)
   r1c4<>8
Hidden single 9 in row 3  (r3c1=9)
   r3c1<>1
   r5c1<>9
Hidden single 1 in row 3  (r3c7=1)
   r1c7<>1
   r1c8<>1
   r3c7<>2
   r4c7<>1
   r5c7<>1
   r6c7<>1
Hidden single 2 in row 3  (r3c4=2)
   r2c6<>2
   r8c4<>2
Hidden single 2 in row 2  (r2c8=2)
   r2c8<>7
   r2c8<>8
   r7c8<>2
Hidden single 1 in row 5  (r5c5=1)
   r4c5<>1
   r5c5<>2
   r5c5<>9
   r6c5<>1
   r6c6<>1
   r8c5<>1
Hidden single 2 in row 5  (r5c1=2)
   r4c2<>2
   r9c1<>2
Hidden single 2 in row 4  (r4c5=2)
   r4c5<>7
   r4c5<>9
Hidden single 9 in row 5  (r5c7=9)
   r4c7<>9
   r6c7<>9
Hidden single 9 in row 4  (r4c2=9)
Hidden single 1 in row 6  (r6c3=1)
   r4c3<>1
   r6c3<>6
   r6c3<>8
Hidden single 1 in row 4  (r4c8=1)
   r4c8<>7
   r4c8<>8
Hidden single 7 in row 4  (r4c7=7)
   r1c7<>7
   r4c7<>8
   r6c7<>7
Hidden single 8 in row 4  (r4c3=8)
   r2c3<>8
   r6c1<>8
Hidden single 8 in row 6  (r6c7=8)
   r1c7<>8
Hidden single 9 in row 6  (r6c5=9)
   r6c5<>7
Hidden single 7 in row 6  (r6c6=7)
   r2c6<>7
Hidden single 7 in row 2  (r2c5=7)
   r1c5<>7
   r2c5<>5
   r2c5<>6
   r2c5<>8
Hidden single 7 in row 1  (r1c8=7)
   r1c8<>8
Hidden single 8 in row 2  (r2c1=8)
   r1c1<>8
   r2c1<>5
   r2c1<>6
Hidden single 8 in row 1  (r1c5=8)
   r1c5<>5
   r1c5<>6
   r3c5<>8
   r8c5<>8
Hidden single 5 in row 2  (r2c6=5)
   r8c6<>5
Hidden single 6 in row 2  (r2c3=6)
   r1c1<>6
   r1c2<>6
Hidden single 6 in row 1  (r1c7=6)
   r3c9<>6
   r8c7<>6
Hidden single 6 in row 3  (r3c5=6)
Hidden single 8 in row 3  (r3c9=8)
   r9c9<>8
Hidden single 2 in row 7  (r7c6=2)
   r7c6<>9
Hidden single 9 in row 7  (r7c8=9)
   r9c8<>9
Hidden single 2 in row 8  (r8c7=2)
Hidden single 5 in row 8  (r8c5=5)
Hidden single 6 in row 8  (r8c2=6)
   r6c2<>6
   r8c2<>1
   r9c1<>6
   r9c2<>6
Hidden single 6 in row 6  (r6c1=6)
   r6c1<>5
Hidden single 5 in row 6  (r6c2=5)
   r1c2<>5
Hidden single 5 in row 1  (r1c1=5)
   r1c1<>1
Hidden single 1 in row 1  (r1c2=1)
   r9c2<>1
Hidden single 1 in row 8  (r8c6=1)
   r9c6<>1
Hidden single 8 in row 8  (r8c4=8)
Hidden single 1 in row 9  (r9c1=1)
Hidden single 2 in row 9  (r9c2=2)
Hidden single 6 in row 9  (r9c9=6)
Hidden single 8 in row 9  (r9c8=8)
Hidden single 9 in row 9  (r9c6=9)