There are four difficulties to choose from.
All four puzzles have the same solution.A) Novice.
B) Apprentice (mainstream edition).
C) Master [74 Intersections, N/H Subsets, 1 X-Wing & 1 Skyscraper].
D) Guru [20 easy chains or a variety of other techniques will make your day].
Regular Clueless Explosion #3A (Novice)Rating based on required solving techniques: Moderate
000007400000000005050003700200000001600000000580401000900600000000900003000000000
090000010000000000002300700000001400900008000603709001039000025000003000500007030
002003000001004000003000080000009070400007009500030000000070000000600807000000610
300010005000000007027005080603000020000000100008090300000000030001300000200006000
000040090008007000000901002700000000000006000600003570000010004000308000007000000
070100000000206000900040000800003090003000701050010800000800400000000000000000600
000000000006000000803007060000000002000001000400050076050038009000005000308900000
000003005000800000050200100030000000000008000600035079090000008300000007000642000
008005060000100000200000807700000000000700100510060003000601090600000000000000000
Regular Clueless Explosion #3B (Apprentice)Rating based on required solving techniques: Moderate
000007400000000005050003700200000001600000000580401000900600000000900003000000000
090000010000000008002300700000001400900008000603709001039000005000003000000007030
002003000001004000003000080000009070400007009500030000000070000000600807000000610
300010005000000007027005080603000020000000100008090300000000030001300000200006000
000040090008007000000901002700000000000006000600003570000010004000308000007000000
070100000000206000900040000800003090003000701050010800000800400000000000000000600
000000000006000000803007060000000002000001000400050076050038009000005000308900000
000003005000800000000200100030000000000008000600035079090000008300000007000642000
008005060000100000200000807700000000000700100510060003000601090600000000000000000
Regular Clueless Explosion #3C (Master)Rating based on required solving techniques: Barely Extra Hard
000007400000000005050003700200000001600000000580401000900600000000900003000000000
000000000100000000002300700000001400900008000603709001039000005000003000000007030
002003000001004000003000080000009070400007009500030000000070000000600807000000610
300010005000000007027005080603000020000000100008090300000000030001300000200006000
000040090008007000000901002700000000000006000600003570000010004000308000007000000
070100000000206000900040000800003090003000701050010800000800400000000000000000600
000000000006000000803007060000000002000001000400050076050038009000005000308900000
000003005000800000000200100030000000000008000600035079090000008300000007000642000
008005060000100000200000807700000000000700100510060003000601090600000000000000000
Regular Clueless Explosion #3D (Guru)Rating based on required solving techniques: Ultra Hard
000007400000000005050003700200000001600000000580401000900600000000900003000000000
000000010000000000002300700000001400900008000603709001039000005000003000000007030
002003000001004000003000080000009070400007009500030000000070000000600807000000610
300010005000000007027005080603000020000000100008090300000000030001300000200006000
000040090008007000000901002700000000000006000600003570000010004000308000007000000
070100000000206000900040000800003090003000701050010800000800400000000000000000600
000000000006000000803007060000000002000001000400050076050038009000005000308900000
000003005000800000000200100030000000000008000600035079090000008300000007000642000
008005060000100000200000807700000000000700100510060003000601090600000000000000000
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