There are three difficulties to choose from.
All three puzzles have the same solution.A) Novice.
B) Apprentice (mainstream edition).
C) Master (68 Intersections, 9 Naked Pairs, 4 Naked Triplets, 1 Naked Quad, 3 Hidden Pairs,
1 Uniqueness Test 1 in g6,
1 Skyscraper in g5,
1 late XY-Wing in g5).
Select to view GRID numbers.The advanced techniques are needed in 2 different grids.Regular Clueless Special #31A (Novice)Rating based on required solving techniques: Moderate
000200350000001200069700000000000000470000000010000020007800000005007900000000860
000000008000090004001000030700000000100000040006000070200000000600031020054060903
050000009600407010000290000008000900060000201400000003000001080500003007100060050
000900007000000803380010000010000400070000020040000000000300102609007005700000040
000460000005002700830005040000000500200000030050000006070080052008001004300700080
029000046000000000000809002000000009700000000018000020007900300000004105086000004
000002005900801000034000070000000006020000010800000009001070400080000000500008907
200900105000408000007000400003000001850000060000000040020000070000040309010530002
000500040009060030200094010040000900007000300600000000000050001900018400003400005
Regular Clueless Special #31B (Apprentice)Rating based on required solving techniques: Hard
000200350000001200069700000000000030470000000010000020607800000005007900000030860
000000008000090004001000030700000000100000040006000070200000000600031020054060903
050000000600407010000290000008000900060000200400000003000001080500003007100060050
000980007000000803380010000016000400000000020040000000800300102609007005700000040
000460000005002700830005040000000500200000030050000006070080052008001004300700080
329000046000000000000040002060000009700000000018000020007900300000004105086000004
000002005900801000034000070000000006020000010800000009001370400080000100500008907
200900005000408000007000400003000001850000060000000040000000070000040309010500002
000000040009060030200094010040000900007000300600000000000000001900018400003400005
Regular Clueless Special #31C (Master)Rating based on required solving techniques: Barely Super Hard
000200350000001200069700000000000030470000000010000020007800000005007900000030860
000000008000090004001000030700000000100000040006000070200000000600031020054060903
050000000600407010000290000008000000060000201400000003000001080500003007100060050
000900007000000803380010000010000400000000020040000000000300102609007005700000040
000460000005002000830005040000000500200000030050000006070000052008001004300700080
029000046000000000000009002000000009700000000018000020007900300000004105086000004
000002005900800000034000070000000006020000010800000009001070400080000100500008907
200900005000408000007000400003000001850000060000000040020000070000040309010500002
000000000009060030200094010040000900007000300600000000000000001900018400003000005
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