puzzle examples will appear here....processing...

Sn4

top1465.72.4
Sn4 r3c4 ISN'T 8: 4-long naked set in 3x3 block 2 involving 1,4,5,8 r2c4r2c5r2c5r2c6r2c6r3c4r3c4 r2c4#8r2c5#5r2c5#8r2c6#5r2c6#8r3c4#4r3c4#8
Sn4 r1c5r1c5r1c5r1c6r1c6r1c6r1c6r3c5r3c5r3c6r3c6r3c6

Sn4

top1465.95.4
Sn4 r3c4 ISN'T 8: 4-long naked set in 3x3 block 2 involving 1,4,5,8 r2c4r2c5r2c5r2c6r2c6r3c4r3c4 r2c4#8r2c5#5r2c5#8r2c6#5r2c6#8r3c4#4r3c4#8
Sn4 r1c5r1c5r1c5r1c6r1c6r1c6r1c6r3c5r3c5r3c6r3c6r3c6

Sn4

top1465.156.4
Sn4 r5c9 ISN'T 2: 4-long naked set in 3x3 block 6 involving 2,3,4,9 r4c7r4c9r5c9 r4c7#4r4c9#2r5c9#2
Sn4 r4c8r4c8r4c8r5c7r5c7r5c8r5c8r5c8r5c8r6c8r6c8

Sn4

top1465.160.4
Sn4 r3c4 ISN'T 5: 4-long naked set in 3x3 block 2 involving 4,5,7,8 r2c4r2c5r2c5r2c6r2c6r3c4r3c4 r2c4#4r2c5#4r2c5#7r2c6#4r2c6#7r3c4#4r3c4#5
Sn4 r1c5r1c5r1c5r1c5r1c6r1c6r1c6r3c5r3c5r3c5r3c6r3c6

Sn4

top1465.185.4
Sn4 r3c4 ISN'T 5: 4-long naked set in 3x3 block 2 involving 4,5,7,8 r2c4r2c5r2c5r2c6r2c6r3c4r3c4 r2c4#4r2c5#4r2c5#7r2c6#4r2c6#7r3c4#4r3c4#5
Sn4 r1c5r1c5r1c5r1c6r1c6r1c6r1c6r3c5r3c5r3c6r3c6r3c6

Sn4

top1465.194.5
Sn4 r3c4 ISN'T 5: 4-long naked set in 3x3 block 2 involving 4,5,7,8 r2c4r2c5r2c5r2c6r2c6r3c4r3c4 r2c4#4r2c5#4r2c5#7r2c6#4r2c6#7r3c4#4r3c4#5
Sn4 r1c5r1c5r1c5r1c6r1c6r1c6r1c6r3c5r3c5r3c6r3c6r3c6

Sn4

top1465.228.2
Sn4 r7c9 ISN'T 5: 4-long naked set in row 7 involving 1,3,5,7 r7c4r7c4r7c5r7c5r7c5r7c7r7c8r7c9r7c9r7c9 r7c4#3r7c4#7r7c5#1r7c5#3r7c5#7r7c7#1r7c8#3r7c9#1r7c9#3r7c9#5
Sn4 r7c1r7c1r7c1r7c2r7c2r7c2r7c2r7c3r7c3r7c3r7c3r7c6r7c6r7c6

Sn4

top1465.235.4
Sn4 r1c9 ISN'T 5: 4-long naked set in row 1 involving 1,5,7,8 r1c2r1c2r1c2r1c4r1c4r1c6r1c6r1c9 r1c2#1r1c2#5r1c2#7r1c4#5r1c4#7r1c6#5r1c6#7r1c9#5
Sn4 r1c1r1c1r1c5r1c5r1c7r1c7r1c7r1c7r1c8r1c8r1c8

Sn4

top1465.258.3
Sn4 r7c9 ISN'T 5: 4-long naked set in row 7 involving 1,3,5,7 r7c4r7c4r7c5r7c5r7c5r7c7r7c8r7c9r7c9r7c9 r7c4#3r7c4#7r7c5#1r7c5#3r7c5#7r7c7#1r7c8#3r7c9#1r7c9#3r7c9#5
Sn4 r7c1r7c1r7c1r7c2r7c2r7c2r7c2r7c3r7c3r7c3r7c3r7c6r7c6r7c6

Sn4

top1465.262.5
Sn4 r8c2 ISN'T 9: 4-long naked set in 3x3 block 7 involving 5,6,8,9 r7c1r7c1r7c2r7c2r7c3r8c2r8c2r8c2 r7c1#5r7c1#8r7c2#5r7c2#8r7c3#5r8c2#5r8c2#8r8c2#9
Sn4 r8c1r8c1r8c1r8c1r8c3r8c3r8c3r9c2r9c2r9c3r9c3

Sn4

top1465.271.6
Sn4 r7c9 ISN'T 5: 4-long naked set in row 7 involving 1,3,5,7 r7c4r7c4r7c5r7c5r7c5r7c7r7c9r7c9r7c9 r7c4#5r7c4#7r7c5#1r7c5#5r7c5#7r7c7#1r7c9#1r7c9#3r7c9#5
Sn4 r7c1r7c1r7c1r7c2r7c2r7c2r7c2r7c3r7c3r7c3r7c3r7c6r7c6r7c6r7c6

Sn4

top1465.319.12
Sn4 r9c3 ISN'T 9: 4-long naked set in 3x3 block 7 involving 2,5,8,9 r7c2r7c2r7c3r9c1r9c3 r7c2#5r7c2#8r7c3#5r9c1#9r9c3#9
Sn4 r8c1r8c1r8c1r8c2r8c2r8c2r8c2r8c3r8c3r9c2r9c2

Sn4

top1465.322.2
Sn4 r6c9 ISN'T 8: 4-long naked set in 3x3 block 6 involving 1,2,3,8 r4c7r4c7r5c7r5c7r6c7r6c7r6c9r6c9r6c9 r4c7#2r4c7#3r5c7#1r5c7#2r6c7#1r6c7#3r6c9#1r6c9#3r6c9#8
Sn4 r4c8r4c8r4c8r4c9r4c9r4c9r5c8r5c8r5c8r5c9r5c9r5c9

Sn4

top1465.353.4
Sn4 r3c5 ISN'T 4: 4-long naked set in 3x3 block 2 involving 1,3,4,5 r1c4r1c4r2c5r2c5r3c4r3c4r3c5r3c5 r1c4#1r1c4#3r2c5#3r2c5#4r3c4#1r3c4#3r3c5#3r3c5#4
Sn4 r1c5r1c5r1c6r1c6r1c6r1c6r2c6r2c6r2c6r2c6r3c6r3c6r3c6

Sn4

top1465.362.27
Sn4 r5c6 ISN'T 8: 4-long naked set in 3x3 block 5 involving 1,2,3,8 r4c5r5c5r5c6 r4c5#8r5c5#8r5c6#8
Sn4 r4c6r4c6r5c4r5c4r6c4r6c4r6c6r6c6

Sn4

top1465.406.20
Sn4 r2c4 ISN'T 7: 4-long naked set in 3x3 block 2 involving 3,4,5,7 r1c5r2c4r2c4 r1c5#3r2c4#4r2c4#7
Sn4 r2c6r2c6r2c6r3c4r3c4r3c5r3c5r3c6r3c6r3c6r3c6

Sn4

top1465.418.19
Sn4 r3c8 ISN'T 4: 4-long naked set in row 3 involving 1,3,4,8 r3c5r3c5r3c6r3c6r3c7r3c7r3c8r3c8r3c8 r3c5#1r3c5#8r3c6#3r3c6#8r3c7#3r3c7#4r3c8#1r3c8#3r3c8#4
Sn4 r3c1r3c1r3c1r3c2r3c2r3c2r3c4r3c4r3c4r3c9r3c9r3c9

Sn4

top1465.470.10
Sn4 r3c3 ISN'T 3: 4-long naked set in 3x3 block 1 involving 1,3,5,8 r1c3r1c3r2c3r2c3r3c1r3c3 r1c3#3r1c3#8r2c3#3r2c3#8r3c1#3r3c3#3
Sn4 r1c1r1c1r1c1r1c2r1c2r1c2r2c1r2c1r2c1r3c2r3c2

Sn4

top1465.488.4
Sn4 r6c6 ISN'T 6: 4-long naked set in 3x3 block 5 involving 2,4,6,9 r4c6r4c6r4c6r5c5r5c5r5c6r6c6r6c6 r4c6#4r4c6#6r4c6#9r5c5#2r5c5#4r5c6#4r6c6#4r6c6#6
Sn4 r4c4r4c4r4c4r4c4r4c5r4c5r4c5r4c5r5c4r5c4r6c5r6c5r6c5

Sn4

top1465.542.3
Sn4 r6c6 ISN'T 9: 4-long naked set in 3x3 block 5 involving 1,4,8,9 r4c5r4c5r5c5r6c5r6c6r6c6r6c6 r4c5#4r4c5#8r5c5#4r6c5#8r6c6#1r6c6#8r6c6#9
Sn4 r4c6r4c6r4c6r4c6r5c4r5c4r5c4r5c6r5c6r5c6r6c4r6c4r6c4
Sn4

top95.51.5
Sn4 r8c2 ISN'T 9: 4-long naked set in 3x3 block 7 involving 5,6,8,9 r7c1r7c1r7c2r7c2r7c3r8c2r8c2r8c2 r7c1#5r7c1#8r7c2#5r7c2#8r7c3#5r8c2#5r8c2#8r8c2#9
Sn4 r8c1r8c1r8c1r8c1r8c3r8c3r8c3r9c2r9c2r9c3r9c3

Sn4

top95.72.13
Sn4 r9c9 ISN'T 9: 4-long naked set in 3x3 block 9 involving 1,2,7,9 r7c7r7c7r7c7r7c9r7c9r9c7r9c7r9c7r9c9r9c9 r7c7#1r7c7#7r7c7#9r7c9#7r7c9#9r9c7#2r9c7#7r9c7#9r9c9#7r9c9#9
Sn4 r7c8r7c8r7c8r8c7r8c7r8c7r8c7r8c9r8c9r9c8r9c8r9c8