There are four difficulties to choose from.
All four puzzles have the same solution.A) Novice
B) Apprentice (mainstream edition).
C) Master (27 Intersections, 6 Naked Pairs, 2 Naked Triplets,
1 Skyscraper in g2,
1 Turbot Fish in g4).
The Skyscraper and the Turbot Fish are required in different grids.D) Grand Master (36 Intersections, 7 Naked Pairs, 1 Naked Triplet,
1 Uniqueness Test 1 in g2,
1 Turbot Fish in g4,
1 Finned X-Wing in g2,
1 Uniqueness Test 3 in g2,
1 XY-Chain up to 5 links in g4).
I will post a second post with a mini-mini Walktrough of the Master level puzzle, including a detailed explanation of the Turbot Fish (which also is an X-Chain).Regular Samurai #21A (Novice)Rating based on required solving techniques: Moderate
008004000407100600000500000000005090090000080010030405003800000000000000009047000
590000000001020050000800001004000002006003010000500890000270040000000007000086200
000704000000090000000001000080040030006003100002005004000010000000007000000000000
900000000000248000800000000400000100053807000000650038004093010005400007001000000
000080009000600050000000600002718000003000540080000700000002060010004000600001304
Regular Samurai #21B (Apprentice)Rating based on required solving techniques: Tough
008000000407100600000500000000005090090000080010030405003800000000000000009047000
590000000001020050000800001004000002006003510000500890000070040000000007000086200
000704000000090000000001000080040030006003100002005004000010000000007000000000000
900000000000208000800000000400000105053807000000650038004093010005400007001000000
000080009000600050000000600002018000003000540080000700000002060010004000600001304
Regular Samurai #21C (Master)Rating based on required solving techniques: Extra Hard
008000000407100600000500000000005090090000080010030405003800000000000000009047000
590000000001020050000800001004000002006003010000500890000070040000000007000086200
000704000000090000000001000080040030006003100002005004000010000000007000000000000
900000000000248000800000000400000100053807000000650038004093010005400007001000000
000080009000600050000000600002018000003000540080000700000002060010004000600001304
Regular Samurai #21D (Grand Master)Rating based on required solving techniques: Ultra Hard
008000000407100600000500000000005090090000080010030405003800000000000000009047000
590000000001020050000800001004000002006003010000500890000070040000000007000086200
000704000000090000000001000080040030006003100002005004000010000000007000000000000
900000000000040000800000000400000100053807000000650030004093010005400007001000000
000080009000600050000000600002718000003000540080000700000002060010004000600001304
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