There are four difficulties to choose from.
All four puzzles have the same solution.A) Novice.
B) Apprentice (mainstream edition).
C) Master (81 Intersections, 9 Naked Pairs, 9 Naked Triplets, 5 Naked Quads, 1 Hidden Pair).
D) Guru (72 Intersections, 9 Naked Pairs, 4 Naked Triplets, 1 Naked Quad, 2 Hidden Pairs, 2 Turbot Fishes, 1 Finned X-Wing, 1 Finned Swordfish, 1 Grouped TF, 1 Y-Wing, 4 XY-X-Chains up to 3 links).
Regular Clueless Special #5A (Novice)Rating based on required solving techniques: Moderate
000300045507900000003050081400000000000000530702000004070080000020100308805020000
010000000000100050070090301903000200800000000000000080180520006090001048005000100
760100008200000307000052000000000083004000006070000050007013000005000002300095870
002004000008070900500600304004000000000000208069000001483100000000000000000759840
000000700005600023060430000200000300604000100900000200509000002000075049006019000
070000046500021000030600180000000007020000400407000800000000010300007050612509004
002000005030005200605902030080000076090000004000000000809500000004000080000094351
000003204080500000020078030400000000230000860060000040100080052902340070006700000
030000200001806530004070000306000002940000060000000090000408100409000000002300408
Regular Clueless Special #5B (Apprentice)Rating based on required solving techniques: Moderate
000300005507900000003050081000000000000000530702000004000080000020100308805020000
000000000000000050070090301903000200800000000000000080180520006090001048005000000
700100008200000307000052000000000083004000006070000050000013000005000002300090070
002004000008070000500600304000000000000000208069000001483100000000000000000059840
000000700005600023060430000200000300004000100900000000509000002000005049006019000
000000006500021000030600180000000007020000400407000800000000000300007050612009004
002000000030005000605002030080000076090000004000000000800500000004000080000090351
000003004080500000020078030000000000030000860060000040100000002902340070006700000
030000000001006530004070000006000002940000060000000090000008100409000000002300408
Regular Clueless Special #5C (Master)Rating based on required solving techniques: Hard
000300005507900000003050081000000000000000530702000004000000000020100308805020000
000000000000100050070090301903000200800000000000000080180520006090001048005000000
700100008200000307000052000000000083004000006070000050000013000005000002300090070
002004000008070000500600304000000000000000208069000001483100000000000000000009840
000000700005000023060430000200000300004000100900000000509000002000005049006019000
000000046500020000030600180000000007000000400407000800000000000300007050612009004
002000000030005000605002030080000076090000004000000000800500000004000080000090351
000003204080500000020078030400000000030000860060000040100080002902040070006700000
030000000001006530004070000006000002900000060000000090000008100409000000002300408
Regular Clueless Special #5D (Guru)Rating based on required solving techniques: Ultra Hard
000300005507900000003050081000000000000000530702000004000000000020100308805020000
000000000000100050070090301903000200800000000000000080180520006090001048005000000
700100008200000307000052000000000083004000006070000050000013000005000002300090070
002004000008070000500600304000000000000000208069000001483100000000000000000009840
000000700005000023060430000200000300004000100900000000509000002000005049006019000
000000006500020000030000180000000007000000000407000800000000000300007050612009004
002000000030005000605002030000000076090000004000000000800500000004000080000090351
000003204080500000020078030000000000030000860060000040100080002902040070006700000
030000000001006530004070000306000002940000060000000090000408100409000000002300408
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