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 Post subject: Regular Samurai #2
PostPosted: Mon May 05, 2008 6:42 pm 
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All sudoku puzzles in this forum post are the intellectual property of Børge Alexander Tetlie Anderssen.
Copyright © 2008 Børge Alexander Tetlie Anderssen. All rights reserved. Terms of Use.


There are four difficulties to choose from.
Here you can find more information regarding the required solving techniques for each difficulty.
All four difficulties are variations of the same puzzle, i.e. they have identical solutions.

This time I personally found the Apprentice version a bit too easy, so in the future I will probably try to notch it up a bit, unless feedback tells me not to do so.

On the paper the Guru version looks very difficult and requires 6 different advanced techniques, but wizard Glyn probably just pulls a thread (chain) somewhere and then the tapestry unravels completely.

A) Novice.
B) Apprentice (mainstream edition).
C) Master.
D) Guru.



Regular Samurai #2A (Novice)

Rating based on required solving techniques:  Moderate
My personal rating based on actual solving: Easy

Image

000204000709060000003009586000042300032005070090300201901520000020090000000000000
001907050000005001200600400000009108780002046069400070000530000000000000000000000
000070000000000000000310000078000005200850090000007081000008000000600000000020000
390000000005060000800500000009020004041090008600150020050001490002000005000000000
000097408000130500000000000802000000306050000000043809201300000000016030000000000



Regular Samurai #2B (Apprentice)

Rating based on required solving techniques:  Tough
My personal rating based on actual solving: Moderate

Image

000204000709060000003009586000040000032005070090300001901520000020090000000000000
000907050000005001200600400000009108080002046069400070000530000000000000000000000
000070000000000000000310000078000000200050090000007081000000000000600000000020000
390000000005060000800500000009020000041090008600150020000001490002000005000000000
000097408000130500000000000802000000006050000000043809201300000000016030000000000



Regular Samurai #2C (Master)

Rating based on required solving techniques:  A bit Super Hard
My personal rating based on actual solving: Extra Hard

Image

000204000709060000003009586000040300032005070090300001001500000020090000000000000
001907050000005001200600400000009108780002046069400070000530000000000000000000000
000070000000000000000310000078000000200050090000007081000008000000600000000020000
390000000005060000800500000009020000041090008600150020000001400002000005000000000
000097008000130500000000000802000000006050000000043809201300000000016030000000000



Regular Samurai #2D (Guru)

Rating based on required solving techniques:  Really Ultra Hard

Image

000204000709060000003009586000040300032005070090300001001500000020090000000000000
001907050000005001200600400000009108780002046069400070000530000000000000000000000
000070000000000000000310000008000000200050090000007081000008000000600000000020000
390000000005060000800500000009020000041090008600150020000001400002000005000000000
000097008000130500000000000802000000006050000000043809201300000000016030000000000

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Last edited by Børge on Wed May 06, 2009 1:07 pm, edited 5 times in total.

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 Post subject: Re: Regular Samurai #2
PostPosted: Wed May 07, 2008 8:40 am 
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Best so far for #2D needed 3 chains and an X-wing, to keep it as fish free as possible. Haven't checked if the X-wing can go as well. Didn't write them down so will have to recheck later.

Rechecked
Top Left Grid. One AIC.
Centre Grid. X-wing, XY-Wing, AIC and Skyscraper (one of each). (Must have use a contradiction move first time around :oops: ).
Bottom Right Grid. One AIC.
Apart from that locked candidates and N/H sets.

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Last edited by Glyn on Thu May 08, 2008 3:45 pm, edited 2 times in total.

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 Post subject: Re: Regular Samurai #2
PostPosted: Wed May 07, 2008 12:19 pm 
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Very Impressive. Just rearranged the solving techniques in JSudoku ... all chains directly after N/H Subsets. Then no X-Wing or other Fish is required, but N/H Singles, Intersections and 13 Chains.
Now I just have to restore the settings. Being able to save settings to a file would be a blessing, but perhaps :santa: comes before Christmas this year.

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 Post subject: Re: Regular Samurai #2
PostPosted: Thu May 08, 2008 2:15 am 
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I found the mainstream vers to be a good match in difficulty level to the contest samurais at the old place.

Which were always a bit easy, yes -- you could certainly toughen them up a bit as far as I'm concerned. I'm curious to see what other 'mainstreamers' have to say if/when they start wandering over here and commenting....


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 Post subject: Re: Regular Samurai #2
PostPosted: Thu May 08, 2008 8:20 pm 
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It took me just over an hour to complete (apprentice.) Am I a mainstreamer? /shrug Used Clueless Helper and SudoCue to get past a few silly clues I overlooked in the middle puzzle. I don't really want to spend more than an hour on a single puzzle, so the time to solve was solid IMO.

It did seem that a lot of clues are generated in the middle puzzle to solve the outer puzzles. I would like to see more clues generated in the outer puzzles to either help with the inner or cascade to the other outer puzzles (locked candidate or naked pair/triple.) Was tempted to try the Master level difficulty but your rating scared me off, probably rightly so...

Thats my 2 cents. :salute:


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 Post subject: Re: Regular Samurai #2
PostPosted: Thu May 08, 2008 8:55 pm 
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Thanks for the feedback.
For the time beeing I will NOT do any changes to the difficulty.

Beemer wrote:
I don't really want to spend more than an hour on a single puzzle, so the time to solve was solid IMO.
Neither do I, but the time is of course dependent on skills and experience. For me it went quite a bit faster.

It would be interesting to know if you needed approx. the same time for Ruud's Samurais rated Tough? My personal solving time for Ruud's Samurais rated Tough varied extremely, 10-90 minutes, because I sometimes overlooked a naked pair in two cells wide appart.

Beemer wrote:
It did seem that a lot of clues are generated in the middle puzzle to solve the outer puzzles. I would like to see more clues generated in the outer puzzles to either help with the inner or cascade to the other outer puzzles (locked candidate or naked pair/triple.)
IMHO quite similar to Ruud's Samurais. Just take a look at the images at SudoCue.net. But I can try to change that.

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