There are four difficulties to choose from.
All four puzzles have the same solution.A) Novice.
B) Apprentice (mainstream edition).
C) Master (73 Intersections, 7 Naked Pairs, 6 Naked Triplets, 3 Naked Quads, 1 Hidden Pair,
2 Y-Wings: one in g1 and one in g10).
Select to view GRID numbers.D) Grand Master (82 Intersections, 15 Naked Pairs, 9 Naked Triplets, 4 Naked Quads, 1 Hidden Pair,
4 XY-Wings: one in g4 and three in g10,
2 Y-Wings in g1).
Select to view GRID numbers.Regular Clueless Special #19A (Novice)Rating based on required solving techniques: Moderate
000003000703000850005070060030000005000000300001000020000700036400000001079500004
089200004000000001007090000002000000040000090003000020000005010000020050500603080
000000005600009000000530010003000080005000070040000090008050020000020009260400800
000000030000073600000500208080000040301000500020000309008205000400900010003008020
000040008070000200004007001040000790000000000060000500000076309008000002020100000
070000608003000000000070000080000010942000000000000900097005000030400009600080750
000002000021009700000400600030000000498000500000000408010040030700000050602080090
400000800000900063070002900105000000080000000000000020002300050008000017010080400
006003080020740000000000001034000000090000000000000800000005000300000025108320090
Regular Clueless Special #19B (Apprentice)Rating based on required solving techniques: Moderate
000803000703000850005070060030000005000000300001000020000000036400000001079500004
089200004000000001007090000002000000040000090003000020000005000000020050500603080
000000005600009000000530010003000080005000000040000090008000020000020009260400800
000000030000073600000500208080000040001000000020000309008205000400900010003008020
000040008070000200004007001040000790000000000060000500000076309008000002020100000
070000608003000000000070000080000010942000000000000900097005000030400009600080750
000002000021009700000400600030000000098000500000000408010040030700000050602080090
400000800000900063070002900105000000080000000000000020002300050008000017010080400
006000080020740000000000001034000000090000100000000800000005000300000025108300090
Regular Clueless Special #19C (Master)Rating based on required solving techniques: Super Hard
000803000003000850005070060030000005000000300001000020000000036400000001079500004
089200004000000001007090000002000000040000090003000020000005000000020050500603080
000000005600009000000530010003000080005000000040000090008000020000020009260400800
000000030000073600000500208080000040001000000020000309008205000400900010003008020
000040008070000200004007001040000790000000000060000500000076309008000002020100000
070000608003000000000070000080000010942000000000000900097005000030400009600080750
000002000021009700000400600000000000098000500000000408010040030700000050602080090
000000800000900063070002900105000000080000000000000020002300050008000017010080400
006000080020740000000000001034000000090000100000000800000005000300000025108300090
Regular Clueless Special #19D (Grand Master)Rating based on required solving techniques: Super Hard
000803000003000850005070060000000005000000300001000020000000036400000001079500004
089200004000000001007090000002000000040000090003000020000005000000020050500603080
000000005600009000000530010003000080005000000040000090008000020000020009260400800
000000030000073600000500208080000040001000000020000309008205000400900010003008020
000040008070000200004007001040000790000000000060000500000076309008000002020100000
070000608003000000000070000080000010942000000000000900097005000030400009600080750
000002000021009700000400600000000000098000500000000408010040030700000050602080090
000000800000900063070002900105000000080000000000000020002300050008000017010080400
006000080020740000000000001034000000090000100000000800000005000300000025108300090
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