There are four difficulties to choose from.
All four puzzles have the same solution.A) Apprentice (mainstream edition).
B) Master (30 Intersections, 2 Naked Pairs, 2 Y-Wings).
The 2 Y-Wings can be replaced with: 2 XY-Wings + 1 Uniqueness Test 4.C) Guru (30 Intersections, 1 Naked Pair, 1 Naked Triplet, 1 Naked Quad, 1 Finned X-Wing, 2 XY-Wings, 3 Y-Wings, 1 long XY-Chain, 1 XY-X-Chain up to 3 links, 4 longer XY-X-Chains).
The Finned X-Wing can be replaced with an Empty Rectangle.D) Wizard.
Regular Samurai #12A (Apprentice)Rating based on required solving techniques: Barely Tough
300010002009000000000020930020037008000000500510080090100006007006001000005000009
000000000082000700400000901007000235000001000960020070000000000000005400003400602
007900000000070000009000003000000000000620000096000540000800000000003000063790000
000001000950070000002400063890000000000000700030980000209500000000000407075040030
000090004000000000000007600006000001000539070000000200007000908020003000000270010
Regular Samurai #12B (Master)Rating based on required solving techniques: Super Hard
300010002009000000000020930020037008000000500510080090100006000006001000005000000
000000000082000700400000901007000235000001000960020070000000000009005400003400602
000900000000070009000000003000000000000620000096000540000800000000003000000790000
000001000900070000002400000890000000000000700030980000209500000000000407075040030
000090004000000000000007600006000001000539070000000200007000908020003000000270010
Regular Samurai #12C (Guru)Rating based on required solving techniques: Ultra Hard
300010002009000000000020930020037008000000500510080090100006000006001000005000000
001000000082000700400000901007000235000001000960020070000000000000005400000400602
000906000000070000000000000000000100000620030096000540000800000000003000000790000
000001000900070000002400000890000000000000700030980000209500000000000407075040030
000090004000000000000007600006000001000539070000000200007000908020003000000270010
Regular Samurai #12D (Wizard)Rating based on required solving techniques: Nightmare
300010002009000000000020930020037008000000500510080090100006000006001000005000000
000000000082000700400000901007000235000001000960020070000000000000005400003400602
000900000000070000000000003000000000000620000096000540000800000000003000000790000
000001000950070000002400000890000000000000700030980000209500000000000407075040030
000090004000000000000007600006000001000539070000000200007000908020003000000270010
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