There are two difficulties to choose from.
Both puzzles have the same solution.A) Apprentice (mainstream edition).
B) Wizard.
Regular Clueless Explosion #4A (Apprentice)Rating based on required solving techniques: Barely Tough
009008000003200000010900504000050000802000000045000026050001300000800007700000000
300007008900100700000008000000200060500003000140500000000000409000000000010000000
000003078000007000390000000000000004500009000100000709004201800003000900000000000
000300000000000000800500000000090003006105000002004006000046072000000100090000000
000002004000000000000400178960103000100000000038000060000704050002000000000000000
040000000805000002000007810001200900400003000000074300000006075200000000000000000
500130000003006007020570000000000000000009200739000100000904060000000000000000000
005000003000007900060002070009008000800000000000003200070004086000005300000000000
006008030300009000070000000000000400000005002001940800000086029400000000700000000
Regular Clueless Explosion #4B (Wizard)Rating based on required solving techniques: Nightmare
009008000003200000010900504000050000802000000045000026050001300000800000700000000
300007008900100700000008000000200060500003000140500000000000409000000000010000000
000003078000007000390000000000000004500009000100000709004201800003000900000000000
000300000000000000800500000000090003006105000002004006000046072000000100090000000
000002004000000000000400178960103000100000000038000060000704050000000000000000000
040000000805000002000007810001200900400003000000074300000006075200000000000000000
500130000003006007020570000000000000000009200739000100000904060000000000000000000
005000003000007900060002070009008000800000000000003200070004086000005300000000000
006008030300009000070000000000000400000005002001940800000086029400000000700000000
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