SudokuSolver Forum

There are three puzzles and two or three difficulties to choose from, dependent on the solving techniques deployed.
All three puzzles have the same solution.

A) Apprentice (mainstream edition). This one is probably the hardest Apprentice Samurai so far!
B) Master-1 (31 Intersections, 2 Naked Pairs, 5 Naked Triplets, 2 Naked Quads, 2 Two-String Kites, 1 Finned X-Wing, 2 XY-Wings). One XY-Wing can be replaced with a Uniqueness Test 1.
C) Master-2 (30 Intersections, 1 Naked Pair, 5 Naked Triplets, 1 Naked Quad, 1 Two String Kite, 1 Finned X-Wing, 1 Finned Swordfish, 1 Uniqueness Test 1).

Without the Uniqueness Test 1 the Master-2 puzzle becomes a GURU puzzle with the following techniques list:
C) Guru (35 Intersections, 2 Naked Pairs, 5 Naked Triplets, 1 Naked Quad, 1 Hidden Pair, 1 Skyscraper, 2 Two-String Kites, 1 Finned X-Wing, 1 Finned Swordfish, 2 XY-Wings, 1 XYZ-Wing, 2 Y-Wings, 3 XY-Chains up to 5 links, 4 longer XY-Chains, 3 XY-X-Chains up to 3 links, 5 longer XY-X-Chains).



Regular Samurai #11A (Apprentice)

Rating based on required solving techniques:  Hard

005002000908000000000006018000207000000010704107400060000003000804000000690004000
040650000007080000000000809004001002000090405609300001000008500000000007000400200
000005000000270000000000000010700608709030500000001009000000000000300000000017000
002000000100020000006004000400000190000307200005010000000230050079005000000070008
000400900000600080000000000000064500020350004000000870900000001074010008000007030



Regular Samurai #11B (Master-1)

Rating based on required solving techniques:  Super Hard

005002000908000000000006018000207000000010704107400060000003000804000000690004000
040650000007000000000000809004001002000090405609300001000008500000000007000400200
000005000000200000000000000010700608009030500000001009000000000000300000000017000
000000000100020000006004000400000190000307200005010000000230050079005000000070008
000400900000600080000000000000064500020350004000000870900000001074010008000007030



Regular Samurai #11C (Master-2 / Guru)

Rating based on required solving techniques:  Super Hard / Really Ultra Hard

005002000908000000000006018000207000000010704107400060000003000804000000690004000
040650000007000000000000809004001002000090405609300001000008500000000007000400200
000005000000270000000000000010700608009030500000001009000000000000300000000017000
002000000100020000006004000400000190000307200005010000000230000079005000000070008
000400900000600080000000000000064500020350004000000870900000001074010008000007030

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Here a mini-mini Walktrough of the #11B (Master-1) puzzle.
The only advanced technique required to solve this puzzle is a single XY-Wing.

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Quis custodiet ipsos custodes?

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