There are four difficulties to choose from.
All four puzzles have the same solution.A) Apprentice (mainstream edition).
B) Master (59 Intersections, 2 Naked Pairs, 1 Naked Triplet, 4 Naked Quads, 1 Hidden Triplet,
1 Skyscraper in g3,
1 XY-Chain up to 5 links in g2).
Select to view GRID numbers.C) Guru (62 Intersections, 3 Naked Pairs, 2 Naked Triplets, 5 Naked Quads, 2 Hidden Pairs, 1 Skyscraper, 1 Turbot Fish, 2 XYZ-Wings, 3 Y-Wings, 1 XY-Chain up to 5 links, 1 XY-Chain).
D) Wizard.
Regular Clueless Special #7A (Apprentice)Rating based on required solving techniques: Hard
000000004901004000000705260000000700002000030080000420000040003250090100006080000
000400800006050073950000000084000200003000510100000000007009040500600002010040060
000400003003090042700003000000000004098000670600000000007309201500000000030502080
000603000000020830807000000010000200403000700000000000000000006009000401300104900
400851002000000000002000006000000400000000030084000200100030900027004000000009051
000902007804001002030000005000000000600000590300000000013005200000093000050000076
000005080005300000396420500600000018070000000010000006130050007000100600900040002
000020001094000000000004079600000000003000006072000090430000000000082007050001004
170009000800004020600010300010000090000000100300000050087006500000007840030000006
Regular Clueless Special #7B (Master)Rating based on required solving techniques: Barely Ultra Hard
000000004901004000000705260000000700000000030080000420000040003250090100006081000
000400800006000073950000000084000200003000510100000000007009040500600002010040060
000400003003090042740003000000000004098000670600000000007309201500000000030502080
000603000000020830807000000010000200403000700000000000000000006009000401300004900
400851002000000000002000006000000400000000030080000200100030900027000000000009051
000902007804001002030000005000000000600000590000000000013005200000003000050000076
000005080005300000390420500600000018070000000000000006130050007000000600900040002
000020001094000000000004079600000000003000006072000090430000200000082007050001004
170009000800000020600010300010000090000000000000000050007006500000007840030080006
Regular Clueless Special #7C (Guru)Rating based on required solving techniques: Ultra Hard
000000004901004000000705260000000700000000030080000420000040003250090100006081000
000000800006000073950000000084000200003000510100000000007009040500600002010040060
000400003003090042740003000000000004098000670600000000007309201500000000030502080
000603000000020830807000000010000200403000700000000000000000006009000401300004900
400851002000000000002000006000000400000000030080000200100030900027000000000009051
000902007804001002030000005000000000600000590000000000013005200000093000050000076
000005080005300000390420500600000018070000000010000006130050007000000600900040002
000020001094000000000004079600000000003000006072000090430000000000082007050001004
170009000800000020600010300010000090000000000000000050007006500000007840030080006
Regular Clueless Special #7D (Wizard)Rating based on required solving techniques: Nightmare
000000004901004000000705260000000700000000030080000420000040003250090100006080000
000000800006050073950000000084000200003000510100000000007009040500600002010040060
000400003003090042700003000000000004098000670600000000007309201500000000030502080
000603000000020830807000000010000200403000700000000000000000006009000401300104900
400851002000000000002000006000000400000000000084000200100030900027004000000009051
000902007804001002030000005000000000600000590300000000013005200000093000050000076
000005080005300000396420500600000018070000000000000006130050007000100600900040002
000020001094000000000004079600000000003000006072000090430000000000082007050001004
170009000800004020600010300010000090000000100000000050087006500000007840030080006
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