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Børge
 Post subject: Regular Samurai #25
PostPosted: Sun Oct 12, 2008 2:32 pm 
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Joined: Mon Apr 21, 2008 10:32 am
Posts: 868
There are eleven puzzles and eight difficulties to choose from.
All eleven puzzles have the same solution.

A) Novice.
B) Freshman Apprentice (11 Intersections, 1 Naked Pair).
C) Apprentice-1 (17 Intersections, 3 Naked Pairs, 1 Naked Triplet).

D) Apprentice-2 (mainstream edition) [21 Intersections, 3 Naked Pairs, 2 Naked Triplets, 1 Naked Quad].

E) Senior Apprentice (17 Intersections, 3 Naked Pairs, 1 Naked Triplet, 1 Skyscraper).
F) Master-1 (32 Intersections, 2 Naked Pairs, 1 Naked Triplet, 1 Naked Quad, 1 intergrid XY-Wing in g3 and g4). Select to view GRID numbers.
G) Master-2 (26 Intersections, 3 Naked Pairs, 2 Naked Quads, 1 intergrid XY-Chain up to 5 links in g1 and g3). Select to view GRID numbers.
H) Guru-1 (42 Intersections, 3 Naked Pairs, 4 Naked Triplets, 2 Naked Quads, 1 Hidden Pair, 2 Two String Kites, 1 Finned X-Wing, 3 Uniqueness Test 1, 1 XY-Wing, 2 Uniqueness Test 4, 1 XY-Chains up to 5 link, 1 longer XY-Chain, 5 XY-X-Chains up to 3 links, 1 longer XY-X-Chain).
I) Guru-2 (45 Intersections, 4 Naked Pairs, 4 Naked Triplets, 2 Naked Quads, 1 Hidden Pair, 3 Two String Kites, 1 Empty Rectangle, 3 Finned X-Wing, 1 Finned Swordfish, 3 XY-Wings, 2 XYZ-Wings, 2 Y-Wings, 1 Uniqueness Test 4, 8 XY-Chains up to 5 links, 6 longer XY-Chains, 6 XY-X-Chains up to 3 links, 2 longer XY-X-Chains).
J) Chain Guru (40 Intersections, 7 Naked Pairs, 3 Naked Triplets, 1 Naked Quad, 1 Hidden Pair, 1 Uniqueness Test 1, 1 XY-Wing, 4 XY-Chains up to 5 links, 11 XY-X-Chains up to 3 links, 26 longer XY-X-Chains, 2 Grouped XY-Chains up to 3 links, 6 longer Grouped XY-Chains).
K) Chief Wizard. Solvable using logic only? JSudoku needs 1 Recursively Solve, which makes 15 guesses and traverses 18635 nodes.



Regular Samurai #25A (Novice)

Rating based on required solving techniques:  Moderate

Image

070800100602004030000090060000001020829500000040000890050000000004052000003000000
070069003006803091000000000000500300400000000000031740000000000000000006000208000
000035000000000000000000000002307004000000060600800003000509000000000000000001000
000000000007040000200800000000000076079000000080702000000005130006029008501000000
000000010000900000000060030502091000003000800000500002000007100080000009070020008



Regular Samurai #25B (Freshman Apprentice)

Rating based on required solving techniques:  Barely Tough

Image

070800000602004030000090060000001020029500000040000890000000000004052000003010050
000069003006803091000000000000500300400000000000031740000000000090000006001208000
000035000000000090050000001002307004000000060600800003000509000000000000003001000
000000000007040000200800003000000006079000000080702000000005130006029008501000000
000000010000900000000060030502091000003000800000500002000007100080000009070020008



Regular Samurai #25C (Apprentice-1)

Rating based on required solving techniques:  Barely Hard

Image

070800000602100000000090000000001020809540010040000890050000000060002000003610000
070069000500800091000000000000500300460000000000030740000006030000000000000208000
000035000000000000000000000102307004000000060600800003000509000000000000000001000
004000000007040000200800000000000006079000000080702000000005130006029008501000000
000000010000000000000060030502091060003000800000500002900007100080000300070020008



Regular Samurai #25D (Apprentice-2)

Rating based on required solving techniques:  Hard

Image

070800000602104030000090060000081020009500000040000890050000000000052000003600000
070069003500800091000000000000500300060000000000031740040006000090000000000208000
000005040000000090000000000102360000000000060600800003000509000020000010000001800
000000000007040020200800000000000006079500000080700000000005130006029008501000000
000700900010000000800060030502091060000000800000500002930000100080000300000020008



Regular Samurai #25E (Senior Apprentice)

Rating based on required solving techniques:  Barely Extra Hard

Image

070800000602004030000090060000001020029500000040000890050000000004052000003000000
070069003006803091000000000000500300400000000000031740000000000000000006000208000
000035000000000000000000000102307004000000060600800003000509000000000000000001000
000000000007040000200800000000000076079000000080702000000005130006029008501000000
000000010000900000000060030502091000003000800000500002000007100080000009070020008



Regular Samurai #25F (Master-1)

Rating based on required solving techniques:  Super Hard

Image

070800000602104030000090060000081020009500000040000890050000000000052000003600000
070069003500800091000000000000500300060000000000031740000006000000000000000208000
000005000000000000000000000102360004000000060600800003000509000000000000000001000
000000000007040000200800000000000076079500000080700000000005130006029008501000000
000700910000000000000060030502091060000000800000500002930000100080000300070020008



Regular Samurai #25G (Master-2)

Rating based on required solving techniques:  Ultra Hard

Image

070800000602104030000090060000081020009500000040000890000000000000052000003600000
070069003500800091000000000000500300060000000000031740040006000090000000000208000
000005040000000090000000000102360000000000060600800003000509000020000010000001800
000000000007040020200800000000000006079500000080700000000005130006029008501000000
000700900010000000800060030502091060000000800000500002930000100080000300000020008



Regular Samurai #25H (Guru-1)

Rating based on required solving techniques:  Ultra Hard

Image

070800100602004030000090060000001020829500000040000890050000000004052000003000000
070069003006803091000000000000500300400000000000031740000000000000000006000208000
000005000000000000000000000002307004000000060600800003000509000000000000000001000
000000000007040000200800000000000076079000000080702000000005130006029008501000000
000000010000900000000060030502091000003000800000500002000007100080000009070020008



Regular Samurai #25I (Guru-2)

Rating based on required solving techniques:  Ultra Hard

Image

070800000602004030000090060000001020029500000040000890050000000004052000003010000
070069003006803091000000000000500300400000000000031740000000000000000006000208000
000035000000000000000000000102307004000000060600800003000509000000000000000001000
000000000007040000200800000000000006079000000080702000000005130006029008501000000
000000010000900000000060030502091000003000800000500002000007100080000009070020008



Regular Samurai #25J (Chain Guru)

Rating based on required solving techniques:  Nightmare

Image

070800000602100000000090000000001020809540010040000890050000000060002000003610000
070069000500800091000000000000500300460000000000030740000006030000000000000208000
000035000000000000000000000102307004000000060600800003000509000000000000000001000
000000000007040000200800000000000006079000000080702000000005130006029008501000000
000000010000000000000060030502091060003000800000500002900007100080000300070020008



Regular Samurai #25K (Chief Wizard)

Rating based on required solving techniques:  Hellish Nightmare   Solvable using logic only?

Image

070800000602004030000090060000001020029500000040000890050000000004052000003010000
070069003006803091000000000000500300400000000000031740000000000000000006000208000
000005000000000000000000000102307004000000060600800003000509000000000000000001000
000000000007040000200800000000000006079000000080702000000005130006029008501000000
000000010000900000000060030502091000003000800000500002000007100080000009070020008

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Børge
 Post subject: Re: Regular Samurai #25
PostPosted: Tue Oct 14, 2008 12:43 pm 
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Joined: Mon Apr 21, 2008 10:32 am
Posts: 868
Here a mini-mini Walktrough of the #25F (Master-1) puzzle.
Hidden Text:
When the intergrid XY-Wing is required 204 out of 369 cells are solved, but none of the 9x9 sub grids are completely solved.

The XY-Wing is difficult to find because:
  1. It is intergrid.
  2. All 32 Intersections and all 4 N/H-Subsets must be found before the XY-Wing becomes visible.

After the XY-Wing is found only N/H-Singles are required to finish the puzzle.

Image

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