There are three difficulties to choose from.
All three puzzles have the same solution.A) Novice.
B) Apprentice (mainstream edition).
C) Master (55 Intersections, 5 Naked Pairs, 4 Naked Triplets, 1 Naked Quad,
3 XY-Wings: one in g7,
one in g1 and one in g2).
Select to view GRID numbers.Regular Clueless Special #37A (Novice)Rating based on required solving techniques: Moderate
000000700003000000400056080010000005045000900000000001000038060020060004607000000
000900400000000901083001060070000090430000000200000100004003080720800040000400005
000000080000003904000150003001000600000000007000000090030000000000060020104509008
000000004024000006008090100065000008000000000000000010000000005070120000046057920
000040000000000700368500000010000000500000100000000050000000038740300002020004010
009042000000000005000056070300000510057000800600000030106000093000007000080004002
000300708009060102030029000000000300090000060006000200000004015020000006047080000
000000008008506030090001004002000005701000000005000310000900070060034080010008006
000000005006004000070230900007000010002000007080000050021300040000900008800010500
Regular Clueless Special #37B (Apprentice)Rating based on required solving techniques: Moderate
000000700003000000400056080010000005045000900000000001000038060020060004607000000
000900400000000901083040060070000090430000000200000100000003080720800040000400005
050000080000003904000150003001000600600000007000000090030000000000060020104509008
000000004024000006008090100065000008400000000000000010000000005070120000046057920
000040000000000706368500000010000000500000100000000050000000038740300002020004010
009042000000000005000056070300000010057000800600000030106000093000007000080004002
000000708009060002030029000000000300090000060006000200000004015020900006047080000
000000000008506030090001004002000000700000000005000310000900070060034080010008006
000000005006004000070230900007000010000000007080000050021000040000900008800010500
Regular Clueless Special #37C (Master)Rating based on required solving techniques: Super Hard
900000700003000000470006080010000005040000900000000001000038060020060004600000000
600900400000000901083041060070000000400000000200000100000003080720000040000000005
050000080200000904000050003301000600000000007000000090030000000000000020164509000
000000004020030006000490100065000008400000000000000010000000005070120000006007900
070040000000000706308500000410000000500000100000000050000000038740300002003004010
079042000000000005000006070302000500007000800600000030106000093000007000080004002
002000708009060002030029000000000300000000060076000200000004010000900006047080000
000000008008506030090001004002000000701000000005000310000900070060030080010000006
000000005006004070070200900000000010002000800080000050021300040000900008800000500
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