There are six difficulties to choose from.
All six puzzles have the same solution.A) Novice.
B) Apprentice (mainstream edition).
C) Master (93 Intersections, 5 Naked Pairs, 1 Naked Triplet,
2 late XY-Chains in g5,
1 very late Skyscraper in g6).
Select to view GRID numbers.The advanced techniques are needed in 2 different grids.D) Junior Guru (93 Intersections, 4 Naked Pairs, 6 Naked Triplets, 4 Naked Quads, 1 Two String Kite, 3 Empty Rectangles, 2 Turbot Fishes, 6 Finned X-Wing, 1 Finned Swordfish, 2 Grouped Turbot Fishes, 1 XY-Wing, 1 XYZ-Wing)
E) Guru (103 Intersections, 5 Naked Pairs, 8 Naked Triplets, 6 Naked Quads, 3 Empty Rectangles, 2 Turbot Fishes, 4 Finned X-Wing, 1 Finned Swordfish, 3 Grouped Turbot Fishes, 3 XY-Wings, 1 XYZ-Wing, 1 Y-Wing, 1 Uniqueness Test 2, 1 Uniqueness Test 4, 2 XY-Chains up to 5 links)
F) Senior Guru (116 Intersections, 6 Naked Pairs, 6 Naked Triplets, 5 Naked Quads, 1 Skyscraper, 3 Empty Rectangles, 2 Turbot Fishes, 3 Finned X-Wing, 3 Grouped Turbot Fishes, 4 XY-Wings, 1 XYZ-Wing, 1 Y-Wing, 1 Uniqueness Test 2, 1 Uniqueness Test 3, 1 XY-X-Chains up to 3 links, 7 longer XY-X-Chains)
In the three Guru puzzles some of the advanced techniques are likely not needed.Regular Clueless Explosion #28A (Novice)Rating based on required solving techniques: Moderate
006000007005000000000708000000000000000000009092013006008036000000800000900000100
000030000400009000020080765005000006000000008900002000030000000100300900200700603
000970000000001504002000080004609021000000005009010000000000009006008000040006000
000003002400500000007000060050004000000000000300980400000000040000000009796020000
000007030306009000000400002000000509000005000001300400020000060000008000050920003
003000200000000000006820003300004062000008000400090070030005004000006005080000100
003000090009000000004905300000050700200000000040790006000008000000000005130600000
050040080000000006003006000000008009004000001001200000070005900000901400009000150
200000004000500000300000001090000067504000000700630000000000200902000000000400800
Regular Clueless Explosion #28B (Apprentice)Rating based on required solving techniques: Moderate
006000007005000000000708000000000400000004009092013006108030090000800000900000100
600030000400009000000000705800000026000000008900802000030006000000300900000700650
005970000000000500002000080000609021000000005000000000020000609006008000000100000
000103002400500000007000060050000008000000100300980000000800000000700000796000300
000000030306009000000400002000000509000005000001300400020700060000008000050000003
040000206001000000006020003309000060000008000000090070000005020000006005080000100
000000090009000000004075300000050700200000000040790006002008000000000005130600000
050040380008000006000006000300008009004000001001200000070000900000901400400000150
207080004000500000300000601090040007500000900000600000000003240902000000000400800
Regular Clueless Explosion #28C (Master)Rating based on required solving techniques: Ultra Hard
006000007005000000000708000000000000000000009092013006008036000000800000900000100
000030000400009000020080765005000006000000000900002000000000000100300900200700603
000970000000001504002000080004609021000000000009010000000000009006008000040006000
000003002400500000007000060050004000000000000300980400000000040000000009796020000
000007000306009000000400002000000009000005000001300400020000060000008000050900003
003000000000000000006820003000004002000008000400090070030005004000006005080000100
003000000009000000004905300000050700200000000040790006000008000000000005130600000
050040080000000006003006000000008009004000001001200000070005900000001400009000150
200000004000500000300000001090000067504000000700630000000000200902000000000400800
Regular Clueless Explosion #28D (Junior Guru)Rating based on required solving techniques: Super Hard
006000007005000000000708000000000000000000009092013006008036000000800000900000100
000030000400009000020080765005000006000000000900002000030000000100300900200700603
000970000000001504002000080004609021000000000009010000000000009006008000040006000
000003002400500000007000060050004000000000000300980400000000040000000009796020000
000007030306009000000400002000000509000005000001300400020000060000008000050900003
003000200001000000006820003000004062000008000400090070030005004000006005080000100
003000090009000000004905300000050700200000000040790006000008000000000005130600000
050000080000000006003006000000708009004000001001200000070005900000001400009000150
200000004000500000300000001090000067504000000700630000000000200902000000000400800
Regular Clueless Explosion #28E (Guru)Rating based on required solving techniques: Ultra Hard
006000007005000000000708000000000000000000009092013006008036000000800000900000100
000030000400009000020080765005000006000000000900002000030000000100300900200700603
000970000000001504002000080004609021000000000009010000000000009006008000040006000
000003002400500000007000060050004000000000000300980400000000040000000009796020000
000007030306009000000400002000000509000005000001300400020000060000008000050900003
003000200001000000006820003000004062000008000400090070030005004000006005080000100
003000000009000000004905300000050700200000000040790006000008000000000005130600000
050000080000000006003006000000708009004000001001200000070005900000001400009000150
200000004000500000300000001090000067504000000700630000000000200902000000000400800
Regular Clueless Explosion #28F (Senior Guru)Rating based on required solving techniques: Ultra Hard
006000007005000000000708000000000000000000009092013006008036000000800000900000100
000030000400009000020080765005000006000000000900002000030000000100300900200700603
000970000000001504002000080004609021000000000009010000000000009006008000040006000
000003002400500000007000060050004000000000000300980400000000040000000009796020000
000007030006009000000400002000000509000005000001300400020000060000008000050900003
003000200001000000006820003000004062000008000400090070030005004000006005080000100
003000000009000000004905300000050700200000000040790006000008000000000005130600000
050000080000000006003006000000708009004000001001200000070005900000001400009000150
200000004000500000300000001090000067504000000700630000000000200902000000000400800