There are three difficulties to choose from.
All three puzzles have the same solution.A) Apprentice (mainstream edition).
B) Master (56 Intersections, 2 Naked Pairs, 1 Naked Triplet, 1 Naked Quad,
1 Uniqueness Test 1 in g7,
2 XY-Chains up to 5 links in g7).
Select to view GRID numbers.C) Guru (77 Intersections, 3 Naked Pairs, 5 Naked Triplets, 2 Naked Quads, 1 Hidden Pair, 1 Skyscraper, 4 Turbot Fishes, 4 Grouped Turbot Fishes, 2 XY-Wings, 1 XY-Chain up to 5 links).
Regular Clueless Explosion #8A (Apprentice)Rating based on required solving techniques: Moderate
000000700501000008008900000000000001000500000000092003075000000000004000603007004
002000000000000600900420080500080010004600000000000004003000700000205000050000009
005000000000400900400080010040000000300000600000000009090006045100000800200708000
000000002700000000020039501008001700206000000900008050000860000005400000000003090
000000000006000000000009560000000100000107009062000074000000006009800000020030007
000010080000000000010080902000000009000002004050007020700000100002000400004503000
000000000700000004001704029000000000000000100100023006000800000000000005030002041
000000000200000308003009000800000010006000000700003004000504600001900000000000020
000030000300006400080700013003005000800000000200100000007090000000002006020000080
Regular Clueless Explosion #8B (Master)Rating based on required solving techniques: Ultra Hard
000000700501000008008900000000000001000500000000092003075000000000004000603007004
002000000000000600900420080500080010004600000000000004003000700000205000050000009
005000000000400900400080010040000000300000600000000009090006045100000800200700000
000000002700000000020039501008001700006000000900008050000860000005400000000003090
000000000006000000000009560000000100000107009062000074000000006009800000020030007
000000080000000000010080902000000009000002004050007020700000100002000400004503000
000000000700000004001704029000000000000000000100023006000800000000000005030002041
000000000200000308003009000800000010006000000700003004000504600001900000000000020
000030000300006400080700013003005000800000000200100000007090000000002006020000080
Regular Clueless Explosion #8C (Guru)Rating based on required solving techniques: Ultra Hard
000000700501000008008900000000000001000500000000092003075000000000004000603007004
002000000000000600900420080500080010004600000000000004003000700000205000050000009
005000000000400900400080010040000000300000600000000009090006045100000800200700000
000000002700000000020039501008001700006000000900008050000860000005400000000003090
000050000006000000000009560000000100000107009062000074000000006009800000020030007
000000080000000000010080902000000009000002004050007020700000000002000400004503000
000000000700000004001704029000000000000000100100023006000800000000000005030002041
000000000200000308003009000800000010006000000700003004000504600001900000000000020
000030000300006400080700013003005000800000000200100000007090000000002006020000080
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