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Regular Samurai #41
http://www.rcbroughton.co.uk/sudoku/forum/viewtopic.php?f=16&t=401		 Page 1 of 1
Author:  Børge [ Sun Feb 01, 2009 3:35 pm ]
Post subject:  Regular Samurai #41
There are eight puzzles and four difficulties to choose from.
All eight puzzles have the same solution.

A) Novice.
B) Apprentice (mainstream edition).
C) Master 1 (11 Intersections, 1 Two String Kite in g5, 1 Empty Rectangle in g5). Select to view GRID numbers.
D) Master 2 (25 Intersections, 1 Naked Pairs, 2 Naked Triplets ,1 Skyscraper in g5, 1 XY-Wing in g3). The advanced techniques are needed in 2 different grids.
E) Master 3 (23 Intersections, 2 Naked Pairs, 1 Two String Kite in g4, 1 Y-Wing in g3). The advanced techniques are needed in 2 different grids.
F) Grand Master 1 (24 Intersections, 4 Naked Pairs, 2 Two String Kites: one in g4 and one in g3, 1 XYZ-Wing in g3, 1 XY-Wing in g3). The advanced techniques are needed in 2 different grids.
G) Grand Master 2 (20 Intersections, 6 Naked Pairs, 1 Uniqueness Test 2 in g3, 1 Finned X-Wing in g3, 1 Y-Wing in g4, 1 Uniqueness Test 1 in g4). The advanced techniques are needed in 2 different grids.
H) Grand Master 3 (18 Intersections, 1 Naked Pairs, 3 Naked Triplets, 2 Uniqueness Test 4: one in g1 and one in g4, 1 Turbot Fish in g4). The advanced techniques are needed in 2 different grids.



Regular Samurai #41A (Novice)

Rating based on required solving techniques:  Moderate

Image

003010000000000408000007000006080000002700086810405200750000000090300000000900000
037000005000000020000074900490001000000400673203008490000000009000085000000000200
000040000000000000000053000200700000030800920050000003000200000000000000000010000
000500000560002000000040000009200000007000602080003000000475000030000058000020000
000001090000080700000000000403002007005000100000940230056000000000016000000700310



Regular Samurai #41B (Apprentice)

Rating based on required solving techniques:  Hard

Image

003010000000000408000000000006080000002700086810405200750000000098300000000900000
930200005000000020000074000490001000000400073203000490000000060000085000000000200
000040000000000000000053000200700000000800920050000003000290000000000000000010000
000500000560002000000040000009200000007000692080003000001470000030000058000020000
000001090000080003000000000400002007005000100000940230156000800000806000000700310



Regular Samurai #41C (Master 1)

Rating based on required solving techniques:  Extra Hard

Image

003010007000000408000007000006080700002000006810405000750100000090300000000900000
937000005000000000000074900400001000000400673203000490080000000000085000000007200
000040080000000000000053000200730000000800920050000003000290000000000004000010000
020000000560000000000040000009200000007100600080003000090475060030000058000020040
000401090004080003000000000400002007005000100000940200056000800000016500000700010



Regular Samurai #41D (Master 2)

Rating based on required solving techniques:  Super Hard

Image

003010000000000408000007000006080000002700086810405200750000000090300000000900000
037000005000000020000074900400001000000400673203008490000000000000085000000000200
000040000000000000000053000200700000030800920050000003000290000000000000000010000
000000000560002000000040000009000000007000692080003000000475000030000058000020040
000401090000080703000000000400002007005000100000940230056000000000816000000700310



Regular Samurai #41E (Master 3)

Rating based on required solving techniques:  Super Hard

Image

003010000000000408000007000006080000002700086010405200750000900090300000000900000
937200005000000020000070900490001000000000673203008400000000009000085000000000200
900040000000000000000053000200700000030800920050000000000290007000000000000010000
020000000560000000000040000009200000007100602080003000000470000030000058000020040
007000090000080003000000000403002000000000100000940200056000800000016000000700310



Regular Samurai #41F (Grand Master 1)

Rating based on required solving techniques:  Super Hard

Image

003010000000000408000007000006080000002700086010405200750000900090300000000900000
937200005000000020000070900490001000000000673203008400000000009000085000000000200
900040000000000000000053000200700000030800920050000000000290000000000000000010000
020000000560002000000040000009200000007100602080003000000470000030000058000020040
000000090000080003000000000403002000000000100000940200056000800000016000000700310



Regular Samurai #41G (Grand Master 2)

Rating based on required solving techniques:  Ultra Hard

Image

003010007000000408000007000006080700002000006810405000750100000090300040000900000
937000005000000000000074900400001000000400673203000490080000000000085000000007200
000040080040000000000053000000730000000800920050000003000290000000000004000000000
020000000560000000000040000009200000007100600080003000090475060030000058000020040
000401090004080003000000000400002007005000100000940200056000800000016500000700310



Regular Samurai #41H (Grand Master 3)

Rating based on required solving techniques:  Ultra Hard

Image

003010000000000408000007000006080000002700086010405200750000900090300000000900000
937200005000000020000070900490001000000000673203008400000000009000085000000000200
900040000000000000000053000200700000030800920050000000000290007000000000000010000
000000000560002000000040000009200000007100602080003000000470000030000058000020040
007000090000080003000000000403002000005000100000940200056000800000016000000700310
Author:  jsmif [ Sun Feb 08, 2009 1:47 am ]
Post subject:  Re: Regular Samurai #41
I got overconfident and tried #F. Bad idea -- that is a VERY difficult puzzle. :scratch:

Will come back later and try one of the easier versoins!
Author:  Børge [ Sun Feb 08, 2009 8:28 pm ]
Post subject:  Re: Regular Samurai #41
jsmif wrote:
I got overconfident and tried #F. Bad idea -- that is a VERY difficult puzzle. :scratch:
Based on your comment I felt challenged to try solving this puzzle.
It is certainly difficult, mainly because not much of the puzzle is solved when the advanced techniques are needed.

I made the puzzle about two weeks ago and unfortunately (or lucky) for me I remembered the XYZ-Wing and the XY-Wing being the correct ones when I found them. Strangely enough I had no remembrance of the Two String Kites and the X-Wing.
I even discovered that the X-Wing is not required. I have updated the puzzle information for #F to reflect this.

I vague hint:
Hidden Text:
The first Two String Kite is needed in another grid than the three other advanced techniques, which are needed in the same grid.

A mini-mini Walktrough:
Hidden Text:
Image



Image



Image
Author:  jsmif [ Sun Feb 08, 2009 11:32 pm ]
Post subject:  Re: Regular Samurai #41
Quote:
It is certainly difficult, mainly because not much of the puzzle is solved when the advanced techniques are needed.


Exactly. Oddly, I was able to find the xyz-wing and the red herring empty rectangle (my first empty rectangle, and it didn't even help!), but some of the smaller fishies eluded me....
Author:  Børge [ Mon Feb 09, 2009 2:08 pm ]
Post subject:  Re: Regular Samurai #41
This puzzle has several red herrings, getting you nowhere. They are just frustrating cul-de-sacs :D

It's impressive you found the XYZ-Wing. Too bad you did not find the first Two String Kite.
Hidden Text:
It is essential to crack to puzzle since it enables the second Two String Kite, which together with XYZ-Wing lays the XY-Wing bare.
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