The New Sudoku Players' Forum

by **champagne** » Sun Nov 09, 2014 8:33 pm

dobrichev wrote:
Code: Select all
3+4+10 3+5+9 3+6+8 3+7+7 4+4+9 4+5+8 4+6+7 5+5+7 5+6+6

I see much work there.

I did not think about feasibility so far, but the couple 3+5+9 and 4+4+9 seems good
If it is feasible, it is likely the limit of what that kind of filter can do
We have puzzles 4+4+9, but not so many and with a very limited number of patterns.

What is for sure is that the filter !(3+4+10) is very efficient in the generation of 17 clues possibly valid patterns.
(killing for example the start 111 111 111)

by **JPF** » Sun Nov 09, 2014 10:56 pm

coloin wrote:Well no need, assuming there isnt a different double band solvable with 7 clues

Not proved on my side.

JPF

by **champagne** » Mon Nov 10, 2014 6:03 am

JPF wrote:
coloin wrote:Well no need, assuming there isnt a different double band solvable with 7 clues

Not proved on my side.

JPF

I continue on my side to scan the field. I have a week off, but the work will go on, I hope to have my partial scan covered by the end of the week.

by **champagne** » Mon Nov 10, 2014 8:18 am

just before I go these that can be already accounted

12345678945718962368927314524...........9...7.................8...6.4............
12345678945718962368927314524...........9...7.................8...6.2............
12345678945718962368927314524...........3...7.................8...6.4............
12345678945718962368927314524...........3...7.................8...6.2............

by **JPF** » Mon Nov 10, 2014 11:11 am

Yes, there are in the list of the 144 puzzles given here.
JPF

by **Serg** » Mon Nov 10, 2014 2:32 pm

Hi, Mladen!

dobrichev wrote:
Code: Select all
3+4+10 3+5+9 3+6+8 3+7+7 4+4+9 4+5+8 4+6+7 5+5+7 5+6+6

I think we must consider distribution 3+3+11 too, because nobody proved it is impossible for valid puzzles.

Serg

by **blue** » Mon Nov 10, 2014 11:50 pm

This post is to announce that Mladen (a.k.a. dobrichev) has completed the testing initiated by this post, and the one that preceded it.
The final result was that of the 1,291,535,777,143 puzzles tested, only 4 were valid:

Code: Select all: 1472365892584791363691582745...1...........98.........7...........8.4............ 1472365892584791363691582745...1...........98.........7...........9.4............ 147258639259346178368179245.8......6...73.............7.1..............4......... 147238695268459137359176284..3.8..........4.6...........5.........6.1............

By considering replacements for band 1 in those puzzles, the list expands to the 144 (ED) puzzles first mentioned by Colin in this post.
In the list above, the first two puzzles expand to 44 puzzles each, and the next two, to 32 and 24 puzzles respectively.

Congratulations all around, to:

champagne

coloin

dobrichev

blue

I'll leave it to others, to detail the implications (e.g. no 17 clue puzzle with "3+4+10" form, exists).

P.S. I should mention that Mladen used his 'fsss2' solver here, and it performed wonderfully:

by **champagne** » Tue Nov 11, 2014 5:10 pm

Serg wrote:I think we must consider distribution 3+3+11 too, because nobody proved it is impossible for valid puzzles.
Serg

Having established that we have no 17 clues puzzles out of a 3+4+27, is it still possible to find a 3+3+27 ? and to have 17 clues puzzles out of it

A question to blue?

Just considering the speed of a brute force with 34 given and the fact that in the process you applied to reduce the count some steps are not so easy (and likely doing part of the job of a brute force), is it really worht to do more than your 842724
IMO, applying directly the 842724 to the 44 till the end (checking validity of puzzles) could be the quickest process

The check of the 3+4+27 has been finally relatively short, what would be the "size factor" for 4+4+27 and 3+5+27. At least for 4+4+27, it seems to me than we are still in the "feasible area"

by **blue** » Wed Nov 12, 2014 9:47 am

champagne wrote:A question to blue?

Just considering the speed of a brute force with 34 given and the fact that in the process you applied to reduce the count some steps are not so easy (and likely doing part of the job of a brute force), is it really worht to do more than your 842724
IMO, applying directly the 842724 to the 44 till the end (checking validity of puzzles) could be the quickest process

It was definitely worth it. For timings on my machine, with 'fsss2' : the initial reduction from 44*842724 to 14760393 <band,pattern> cases, took about 100 seconds, but would save ~4200 hours of CPU time. (The 100s was so small, I didn't bother trying to shorten it). The 2nd reduction (with a "per puzzle" cost), would save ~1050 hours, at a cost of 2 hours. All in all, it gives about a 4:1 reduction, at very little cost.

champagne wrote:The check of the 3+4+27 has been finally relatively short, what would be the "size factor" for 4+4+27 and 3+5+27. At least for 4+4+27, it seems to me than we are still in the "feasible area"

Using the same kinds of reductions, the number of puzzles to be tested, goes from 1.3e+12, to 53.4e+12, based on a small sampling.
They're split pretty evenly between 4+4+27 and 3+5+27 (oddly enough).
With one extra clue, the time to test each puzzle drops to around 81% of what it was for 3+4+27 -- surprise !
The net effect, means around 33.4 times as much CPU time.
With Mladen's 16-core server, it would take ~110 days

I tested around 5.5e+9 puzzles (~a half & half mix), and got 51 results (below) ... 14 3+5+27's and 37 4+4+27's.
Those expanded to 1668 ED puzzles, none of which contained an 18

Hidden Text: Show

by **JPF** » Wed Nov 12, 2014 12:16 pm

About 4-4-27 :

There are 12998 ed patterns and around 7850 ed patterns after Magic processing.
I tested around 1500 patterns and I got (randomly) 870 valid puzzles before "expansion".

List 1 of 4-4-27.txt: (70.6 KiB) Downloaded 278 times

It's where I am.
Edit 1:
I can't say that my puzzles are before "expansion" as defined by blue.
They are, only if, after the minlex transformation of the grid solution, all the 8 "clues" stay in a position > 27

Edit 2: deleted - irrelevant
JPF

by **blue** » Wed Nov 12, 2014 9:47 pm

JPF wrote:Edit 1:
I can't say that my puzzles are before "expansion" as defined by blue.
They are, only if, after the minlex transformation of the grid solution, all the 8 "clues" stay in a position > 27

From the 871 puzzles, I got 823 ED expansion sets, for a total of 29138 ED puzzles.
The first matchup, was for puzzles 1 and 3:

Code: Select all: .................1.....2.34....1.......5.......2...6...24.765.358713426.6.3259487 (#1) .................1.....2.34....1.......5.......2...6...142785935.71.42.882395641. (#3)

Filling out band 3, and swapping 8's and 9's in #3, the two puzzles are:

Code: Select all: . . . | . . . | . . . . . . | . . . | . . 1 . . . | . . 2 | . 3 4 ------+-------+------ . . . | . 1 . | . . . . . . | 5 . . | . . . . . 2 | . . . | 6 . . ------+-------+------ 6 1 4 | 2 7 8 | 5 9 3 5 9 7 | 1 3 4 | 2 6 8 8 2 3 | 9 5 6 | 4 1 7 . . . | . . . | . . . . . . | . . . | . . 1 . . . | . . 2 | . 3 4 ------+-------+------ . . . | . 1 . | . . . . . . | 5 . . | . . . . . 2 | . . . | 6 . . ------+-------+------ 8 2 4 | 9 7 6 | 5 1 3 5 9 7 | 1 3 4 | 2 6 8 6 1 3 | 2 5 8 | 4 9 7

Band 3 in those puzzles, has the same digits in each of the 9 mini-columns ==> they're in the same gangster class.
The tops match too ==> they have the same expansion sets.

There were a lot of 18's here ... 69 ... and no 17's.

Hidden Text: Show

by **coloin** » Thu Nov 13, 2014 11:58 pm

In some ways the exercise was a double success.
Not only were 3+4+27 puzzles found - but all of them were found.
This means that in any search the 3+4 exclusion can effectively be employed as a filter.

However,unless we get further {unknown} reductions the 3+5 and 4+4 cases are beyond the above spectacular efforts.
Maybe useful information will come from 3+5 and 4+4 patterns shown not to have puzzles ....this could then be employed as a further filter.
Maybe the Magic pattern can be extended to cover two bands [I think Serg just looked at single bands [B1B2B3] and crossing bands [B1B2B3B4B7].

As a start, this valid puzzle demonstrates the need for at least 4 clues in B1B2B3B4B6, and fairly rare. [Not proven , I hasten to add.....]

Code: Select all: +---+---+---+ |.1.|...|...| |...|...|.24| |...|...|...| +---+---+---+ |4..|123|...| |...|456|...| |...|789|...| +---+---+---+ |296|538|147| |574|261|983| |831|947|652| +---+---+---+

Even adding 5 clues its sometimes difficult to get a puzzle....
For example, I very much doubt whether the box distribution has valid puzzles ?

Code: Select all: 041 140 999

Edit
.... maybe not as this puzzle is

Code: Select all: 130 051 999 +---+---+---+ |1..|2..|...| |...|.34|...| |...|...|...| +---+---+---+ |...|15.|...| |...|627|...| |...|...|..8| +---+---+---+ |638|792|154| |794|815|263| |521|463|879| +---+---+---+

C

by **coloin** » Fri Nov 14, 2014 4:39 pm

Well it seems Serg and eleven did the work on this.... here

The thread confirmed that the 22 ED [36*] ways of this pattern did not have valid puzzles - and we know that now

Code: Select all: 111 111 999

The thread confirmed that puzzles with this pattern all had valid puzzles [ all 20 ED patterns] [*Excluding 2 empty rows]

Code: Select all: 111 119 999

However eleven generated all the ways for valid puzzles of that pattern and none could be reduced from 9 to 2 clues in B6 - and we know this now too

Code: Select all: 111 112 999

We have since proved that

Code: Select all: 011 011 323 332 332 332

is a required distribution if 2 clues in a band - so all puzzles with 2 clues in a band can be essentially ignored.

Patterns with an empty box were outside the scope of the thread ..... but this one did have valid puzzles

Code: Select all: 111 019 999

C

by **JPF** » Fri Nov 14, 2014 5:38 pm

blue wrote:From the 871 puzzles, I got 823 ED expansion sets, for a total of 29138 ED puzzles.
...
There were a lot of 18's here ... 69 ... and no 17's.

Thanks for analyzing those data.
I produced more puzzles for a while and got 135 18's that are not in your list. -Thanks to Mladen's checker.
Here they are:

18-clue puzzles.txt: (10.94 KiB) Downloaded 278 times

Edit: Here are 242 more:

Hidden Text: Show

Code: Select all: .................1..2..3.4......4....5......6.1........7.8...3...95...2...817...9 ................12..3..4.................3..415.........45..8....9.2.....8761..5. ................12..3..4.................3..415.........45..8....9.2....28.61..5. ................12..3..4.................3..415.........7.1.4...2.59......9.2.3.6 ................12..3..4.................3..451.......6..52......76..3....8.1.47. ................12..3..4.................3..451.......6.452......76..3....8.1..7. ................12..3..4.................5..326..........62.49...89..7....5.1..2. ................12..3..4.................5..326.........517.8...1.2...6...8.6.4.. ................12..3..4.................5..362.........5.1.8..4..6...2...892...7 ................12..3..4.................5..617.........51...8.3..2...7...679.3.. ................12..3..4.................5..617.........8.2.3.5.2.7.......5.1.6.8 ................12..3..4.................5..617.........8.2.3.5.2.7.8.....5.1.6.. ................12..3..4.................5..617........4.81..7...5.2.3....67....9 ................12..3..4.................5..617.......2..19.37...52.......6.7.8.. ................12..3..4.................5..671..........7..3....5.1..9..36.2.4.5 ................12..3..4.................5..671..........7..3....5.13.9...6.2.4.5 ................12..3..4.................5..671..........7.63....5.1..9.1...2.47. ................12..3..4.................5..671.........52.6......1.3.7...6.7.3.8 ................12..3..4.................5..671.........52.6....8.1...7...6.7.3.8 ................12..3..4.................5..671.........528.......1..67...6.7.3.8 ................12..3..4.................5..671.........528.......1..67...65.93.. ................12..3..4.................5..671.........528.......1..67...657.3.. ................12..3..4.................5..671.........528.......1..67..46.7.3.. ................12..3..4.................5..671.........528.......1..675..6.7.3.. ................12..3..4.................5..671.........528.......1.3.7...6.7.3.8 ................12..3..4.................5..671.........528.......1.3.7...657.3.. ................12..3..4.................5..671.........528.......1.3.7..46.7.3.. ................12..3..4.................5..671.........528.......1.3.75..6.7.3.. ................12..3..4.................5..671.........528.......14.67...6.7.3.. ................12..3..4.................5..671.........528.......143.7...6.7.3.. ................12..3..4.................5..671.........528.....8.1..67...6.7.3.. ................12..3..4.................5..671.........528.....8.1.3.7...6.7.3.. ................12..3..4.................5..671.........528....98.1...7...6.7.3.. ................12..3..4.................5..671.........5286......1...7...6.7.3.8 ................12..3..4.................5..671.........5286......1...7...65.93.. ................12..3..4.................5..671.........5286......1...7...657.3.. ................12..3..4.................5..671.........5286......1...7..46.7.3.. ................12..3..4.................5..671.........5286......1...75..6.7.3.. ................12..3..4.................5..671.........5286......14..7...6.7.3.. ................12..3..4.................5..671.........5286....8.1...7...6.7.3.. ................12..3..4.................5..671.........57...8.3.6.2......918.3.. ................12..3..4.................5..671.........57..6.9.8..2......918.3.. ................12..3..4.................5..671.........6.1.5....5.2937...87..... ................12..3..4.................5..671.........6.1.5...45.2.3.8..87..... ................12..3..4.................5..671........7.1...9.5.627......8.9.3.. ................12..3..4.................5..671........7.28.......1..6.5..6.7.3.. ................12..3..4.................5..671........7.28.......1.3.75..6.7.3.. ................12..3..4.................5..671........7.286......1...75..6.7.3.. ................12..3..4.................5..671.......3.52.6......1...7...6.7.3.8 ................12..3..4.................5..671.......3.528.......1...7...6.7.3.8 ................12..3..4.................5..671.......3.528.......1...7...657.3.. ................12..3..4.................5..671.......3.528.......1...7..46.7.3.. ................12..3..4.................5..671.......3.528.......1...75..6.7.3.. ................12..3..4.................5..671.......3.528.......14..7...6.7.3.. ................12..3..4.................5..671.......3.528.....8.1...7...6.7.3.. ................12..3..4.................5..671.......37.28.......1...75..6.7.3.. ........1.....2.....1.....3...4......2.....5..6.........3...1...5..26.8...4.75.2. ........1.....2.....1.....3...4......2.....5..6.........5....2...7.95.6.1.93..4.. ........1.....2.....1.....3...4......2.....5..6.........5....2...719..6..8.3.64.. ........1.....2.....1.....3...4......2.....5..6.........5....2...719..6.1.93..4.. ........1.....2.....1.....3...4......2.....5..6.........714..9...5.9..2..8.7...6. ........1.....2.....1.....3...4......2.....5..6.........714..9...53...2..8.7...6. ........1.....2.....1.....3...4......2.....5..6........3...6..2..51...4...8.95.7. ........1.....2.....1.....3...4......2.....5..6........4.8...6...5..7.2...891..7. ........1.....2.....1.....3...4......2.....5..6........4.8...6...819..7...5..7.2. ........1.....2.....1.....3...4......2.....5..6.......1.47..9....83...4...5.9..6. ........1.....2.....1.....3...4......2.....5..6.......1.839.4....5....6...91...8. ........1.....2.....1.....3...4......2.....5..6.......6.5....2...719..6..8.3..4.. ........1.....2.....1.....3...4......5.....6..2.........7..6.5...61...2.1.83....9 ........1.....2.....2..3.........4...5........1..6......7.1...9..4.5...62.3..67.. ........1.....2.....3.....4....1.....2.....5..6.........5..9.2..7..4..6...913..8. ........1.....2.....3.....4....1.....2.....5..6.........57...2..7..4..6...913..8. ........1.....2.....3.....4....1.....2.....5..6.........814.3...4..7..6...5....2. ........1.....2.....3.....4....4.....2.....5..6.......25...9.6.7..41......4.3..8. ........1.....2.....3.....4....4.....2.....5..6.......25..8..6.7..41......4.3..8. ........1.....2.....3.....4....4.....5.....6..2.......6...1..8...143...758.....2. ........1.....2.....3.....4....4.....5.....6..2.......6..2.5.8...1..8..7..4....23 ........1.....2.....3.....4....4.....5.....6..2.......6..2.5.8...1.38..7..4....2. ........1.....2.....3.....4....4.....5.....6..2.......7...65.8......9.2...471...3 ........1.....2.....3.....4....4.....5.....6..6.........2.8.4.3..7..6.2..4...5..8 ........1.....2.....3.....4....4.....5.....6..6........7...569...8..6.3...4.3..8. ........1.....2.....3.....4...1......2.....5..6.........1....3...4..6..7.38.25.9. ........1.....2.....3.....4...1......2.....5..6.........1....3...4..6..77...25.96 ........1.....2.....3.....4...1......2.....5..6.........1....3...4..6..77.8.25.9. ........1.....2.....3.....4...1......2.....5..6.........1....3...4..6.877...25.9. ........1.....2.....3.....4...1......2.....5..6.........1....3...4..658.7...25.9. ........1.....2.....3.....4...1......2.....5..6.........1....3.2.4..6..77...25.9. ........1.....2.....3.....4...1......2.....5..6.........1....32..4..6..77...25.9. ........1.....2.....3.....4...1......2.....5..6.........17...9...8..536.....96.2. ........1.....2.....3.....4...1......2.....5..6.........185..9.8..4...6...4....27 ........1.....2.....3.....4...1......2.....5..6.........4....293.14..7....8..5.6. ........1.....2.....3.....4...1......2.....5..6.........4...1.9.9..267....8..5.6. ........1.....2.....3.....4...1......2.....5..6.........4...1.93...267....8..5.6. ........1.....2.....3.....4...1......2.....5..6.........4..3..99...76.2...19...8. ........1.....2.....3.....4...1......2.....5..6.........4..8..9..8.95.6...13...7. ........1.....2.....3.....4...1......2.....5..6.........5..3.2..1.9...6...841...3 ........1.....2.....3.....4...1......2.....5..6.........5.7638..4.9...6...7....2. ........1.....2.....3.....4...1......2.....5..6.........5.8..2..1.9...6...841...3 ........1.....2.....3.....4...1......2.....5..6.........547.38..4.9...6...7....2. ........1.....2.....3.....4...1......2.....5..6.........8..5.2....4..76...497..3. ........1.....2.....3.....4...1......2.....5..6.........8..5.2...134.7...5.7...6. ........1.....2.....3.....4...1......2.....5..6.........84...9.3.971.8....5....6. ........1.....2.....3.....4...1......2.....5..6........1.4...6...5..7.2...831..7. ........1.....2.....3.....4...1......2.....5..6........1.4...6...5.9..2...831..7. ........1.....2.....3.....4...1......2.....5..6........1.4...6...5.9..2...831.4.. ........1.....2.....3.....4...1......2.....5..6........1.4...6...58...2...831..7. ........1.....2.....3.....4...1......2.....5..6........1.4...69..5....2...831..7. ........1.....2.....3.....4...1......2.....5..6........1.4...69..5....2...831.4.. ........1.....2.....3.....4...1......2.....5..6........1.4..86...5....2...831..7. ........1.....2.....3.....4...1......2.....5..6........4.8...69..8....2...541.7.. ........1.....2.....3.....4...1......2.....5..6........4.8...696......2...541.7.. ........1.....2.....3.....4...1......2.....5..6........4.8..1.96......2...541.7.. ........1.....2.....3.....4...1......2.....5..6.......3..4...69..5....2...831..7. ........1.....2.....3.....4...1......2.....5..6.......3..4...69..5....2...831.4.. ........1.....2.....3.....4...1......2.....5..6.......3..4..86...5....2...831..7. ........1.....2.....3.....4...1......2.....5..6.......6..7...8.25.....6..8.49...3 ........1.....2.....3.....4...1......2.....5..6.......6.1....3...4..6..77...25.9. ........1.....2.....3.....4...1......2.....5..6.......65.....2..9.4..7....891..6. ........1.....2.....3.....4...1......2.....5..6.......65.....2.3..4..7....891..6. ........1.....2.....3.....4...4......2.....5..6...........86.3...1..9..23.47...8. ........1.....2.....3.....4...4......2.....5..6.........1....6.9.43...8...8..572. ........1.....2.....3.....4...4......2.....5..6.........1....6.9.43..1....8..572. ........1.....2.....3.....4...4......2.....5..6.........1....6.9.43..1..6....572. ........1.....2.....3.....4...4......2.....5..6.........1..3..9.5..96.2...47..8.. ........1.....2.....3.....4...4......2.....5..6.........1..6...9.43...8...8.95.7. ........1.....2.....3.....4...4......2.....5..6.........1..8..9....25.7...49...83 ........1.....2.....3.....4...4......2.....5..6.........1..9.6...8..5.2.3.41...7. ........1.....2.....3.....4...4......2.....5..6.........13...6...8..9.2.7.41...8. ........1.....2.....3.....4...4......2.....5..6.........13...6...8..9.2.7.41..5.. ........1.....2.....3.....4...4......2.....5..6.........137..8...7..852...4....6. ........1.....2.....3.....4...4......2.....5..6.........4.25.3...1....8..9...657. ........1.....2.....3.....4...4......2.....5..6.........41.6...7.19...3...9..5.7. ........1.....2.....3.....4...4......2.....5..6.........417...3.7.9...6...8..5.2. ........1.....2.....3.....4...4......2.....5..6.........418..9...9..5.2...13...6. ........1.....2.....3.....4...4......2.....5..6.........43...6...17...9..5...682. ........1.....2.....3.....4...4......2.....5..6.........48...3.25.....8..9...657. ........1.....2.....3.....4...4......2.....5..6.........48.5.3...1...4.6.9...6..2 ........1.....2.....3.....4...4......2.....5..6.........5....9..1..46..2..81...37 ........1.....2.....3.....4...4......2.....5..6.........5..8.2.8..1...6...794.3.. ........1.....2.....3.....4...4......2.....5..6.........5.7..2.8..1...6...794.3.. ........1.....2.....3.....4...4......2.....5..6.........53...2.8..1...6...794.3.. ........1.....2.....3.....4...4......2.....5..6.........7..8.9...41.6...9.17...3. ........1.....2.....3.....4...4......2.....5..6.........7..9.2.8.41.......1.35.6. ........1.....2.....3.....4...4......2.....5..6.........7..9.238.41.......1..5.6. ........1.....2.....3.....4...4......2.....5..6.........7.89.3.8.47...9...1..6... ........1.....2.....3.....4...4......2.....5..6.........7.89.6...43...7..31..6... ........1.....2.....3.....4...4......2.....5..6.........78...9..45....6..8...652. ........1.....2.....3.....4...4......2.....5..6.........78...9..8...652..15....6. ........1.....2.....3.....4...4......2.....5..6.........8..1.25.1.7...6...489.... ........1.....2.....3.....4...4......2.....5..6.........8..5.2..4.7...6..9134.... ........1.....2.....3.....4...4......2.....5..6.........8..5.2..4.7...69..134.... ........1.....2.....3.....4...4......2.....5..6.........8..5.2.3.57...6...134.... ........1.....2.....3.....4...4......2.....5..6.........814...3.9.5...6...43...7. ........1.....2.....3.....4...4......2.....5..6........4.1..8....93.5.6.68.....2. ........1.....2.....3.....4...4......2.....5..6........4.1..8....938..6.6.5....2. ........1.....2.....3.....4...4......2.....5..6........4.1.68....938..6...5....2. ........1.....2.....3.....4...4......2.....5..6........45....9..1...6..2..8.25.3. ........1.....2.....3.....4...4......2.....5..6........5.7...6...81...2...134.7.. ........1.....2.....3.....4...4......2.....5..6........7.1...6...534..8...9.8..2. ........1.....2.....3.....4...4......2.....5..6........7.1...6...534..8...95...2. ........1.....2.....3.....4...4......2.....5..6........7.8...6...93...2...194..8. ........1.....2.....3.....4...4......2.....5..6.......2...78..6..19..4.....3.6.8. ........1.....2.....3.....4...4......2.....5..6.......2...7859...19...3......6.8. ........1.....2.....3.....4...4......2.....5..6.......3.18...9...4....6...8..532. ........1.....2.....3.....4...4......2.....5..6.......3.51...8...935..7...8.....6 ........1.....2.....3.....4...4......2.....5..6.......3.71..8....938..6...5....2. ........1.....2.....3.....4...4......2.....5..6.......6...25.3...1....8..9...657. ........1.....2.....3.....4...4......2.....5..6.......6.1..85......25.7...49...8. ........1.....2.....3.....4...4......2.....5..6.......6.13...8...49...7......852. ........1.....2.....3.....4...4......2.....5..6.......64.....3..9.12..7...8..7..6 ........1.....2.....3.....4...4......5.....6..2.........1....53..418...9..9..7.2. ........1.....2.....3.....4...4......5.....6..2.........1..8..26.4....3...9.65.7. ........1.....2.....3.....4...4......5.....6..2.........1..8..26.4....3.2...65.7. ........1.....2.....3.....4...4......5.....6..2.........1..8..98...65.2...43...7. ........1.....2.....3.....4...4......5.....6..2.........1.8..9...8..563...43...7. ........1.....2.....3.....4...4......5.....6..2.........4....23..1..5..97...26.5. ........1.....2.....3.....4...4......5.....6..2.........4...1.3..1..5..97...26.5. ........1.....2.....3.....4...4......5.....6..2.........4.78.9...1....3.8....567. ........1.....2.....3.....4...4......5.....6..2.........43...8...1..9.5.7....562. ........1.....2.....3.....4...4......5.....6..2.........43...9.7....568...1..6.3. ........1.....2.....3.....4...4......5.....6..2.........437..9...1....3.8....567. ........1.....2.....3.....4...4......5.....6..2.........7..8.5.9.41..8....1....23 ........1.....2.....3.....4...4......5.....6..2.........73.8.5.9.41..8....1....2. ........1.....2.....3.....4...4......5.....6..2.........734.9..3.61...7...8....5. ........1.....2.....3.....4...4......5.....6..2........64....2...134...97..1...5. ........1.....2.....3.....4...4......5.....6..2.......56.....2...134...97..1...5. ........1.....2.....3.....4...4......5.....6..6.........1..8..2..43...7..8..69.3. ........1.....2.....3.....4...4......5.....6..6.........4.3..9...9..6.3..2...568. ........1.....2.....3.....4...4......5.....6..6.........483..9.....1..8.2.1..5..7 ........1.....2.....3.....4...4......5.....6..6.........8..563...1..6.8...43...7. ........1.....2.....3.....4...4......5.....6..6.........819..3...2..6.7..1..4...5 ........1.....2.....3.....4...4......5.....6..6.......2....869...43...7...91...3. ........1.....2.....3.....4...4......5.....6..6.......7.4.3..9.2....5..8....18.3. ........1.....2.....3.....4...4......5.....6..7.........43...9..9..76.5...1..5..3 ........1.....2.....3.....4...4......5.....6..7.........43...9.3...76.5...1..5..3 ........1.....2.....3.....4...5......2.....6..7.........91...5...1.3.8...6..87.2. ........1.....2.....3.....4...5......2.....6..7........6.4...7...8..6.2...431...6 ........1.....2.....3.....4...5......2.....6..7........6.4...7...8..6.2...431.8.. ........1.....2.....3..4..........4..1..5.....6.........5.6...9.8..1..76.42....3. ........1.....2.....3..4..........4..1..5.....6.........54.3..9.8..1...6..2...1.5 ........1.....2.....3..4..........4..1..5.....6.........546...9.8..1...6..2....35 ........1.....2.....3..4..........4..1..5.....6.........546...9.8..15..6..2....3. ........1.....2.....3..4..........4..1..5.....6........4.71...6..8.6...5..2.3..7. ........1.....2.....3..4..........4..1..5.....6........72....8..5.91...6..8.6...5 ........1.....2.....3..4..........4..5..6.....6.........8.9...6..2.3..8.3.4..7..5 ........1.....2.....3..4..........4..5..6.....6.......1..65...9..4.9..3...8.1..2. ........1.....2.....3..4.........2...1..5.....6.........7.1.....9..6.4....58.372. ........1.....2.....3..4.........2...1..5.....6.........7.1.....9..6.4....589.72. ........1.....2.....3..4.........2...5........1..6......6.1...98...5.7....2..348. ........1.....2.....3..4.........2...5........1..6......7...39...6.1...7.2..594.. ........1.....2.....3..4.........2...5........1..6......8.5...63.27..4...94.1.... ........1.....2.....3..4.........2...5........1..6......8.5.9.6.6.7...15..42..... ........1.....2.....3..4.........2...5........1..6......83....9.6..9..15..4.1...6 ........1.....2.....3..4.........4...1........5..6......2..1..5..9.3..87..4.87... ........1.....2.....3..4.........4...1........5..6......2..1..5..9.3..87.34.8.... ........1.....2.....3..4.........4...1........5..6......2..13.5..9.3..87..4.8.... ........1.....2.....3..4.........4...1........5..6......2..5..9..4.3....8...97.15 ........1.....2.....3..4.........4...1........5..6......2..5..9..4.3....8.6.9..15 ........1.....2.....3..4.........4...1........5..6......2..5..9..4.3....8.6.9.21. ........1.....2.....3..4.........4...1........5..6......2..5..9..4.31...8.6.9.2.. ........1.....2.....3..4.........4...1........5..6......2.1....9.4..72....8.5.3.7 ........1.....2.....3..4.........4...1........5..6......2.13...9.4..72....8.5...7 ........1.....2.....3..4.........4...1........5..6......26.5..9..4.3....8...9..15 ........1.....2.....3..4.........4...1........5..6......4.5...97..61...5..2.8.3.. ........1.....2.....3..4.........4...1........5..6......8.5...6..2.1.3.73.4...2.. ........1.....2.....3..4.........4...1........5..6.....72..5..9..4.3....8...9..15 ........1.....2.....3..4.........4...1........5..6....7.2..1..5..9.3..87..4.8.... ........1.....2.....3..4.........4...1........5..6....78...1..5..9.3.2.7..4.8.... ........1.....2.....3..4.........4...1..5.....6.........2.6.....5..1..76..4.738.. ........1.....2.....3..4.........4...1..5.....6.........28......5..1..76..4.738.. ........1.....2.....3..4.........4...1..5.....6.........72..93...5.1...8.8..6.2.. ........1.....2.....3..4.........4...1..5.....6.........8.1...5.5..6.7....47..23. ........1.....2.....3..4.........4...1..5.....6.......7.2.3.8....4...2.6..9.7...5 ........1.....2.....3..4.........4...5........1..6......2..5..9..4.8..6...7.3..15 ........1.....2.....3..4.........4...5........1..6......2..5..9..4.8.7....7.3..15 ........1.....2.....3..4.........4...5........1..6......2.8.3..9.46..2....6.5...7 ........1.....2.....3..4.........4...5........1..6......48..9....2..7..3.6..1..57 ........1.....2.....3..4.........4...5........1..6......7..834.3.6.7.2....9.5.... ........1.....2.....3..4.........4...5........1..6......7.1...9..4.9.36..9..5.8.. ........1.....2.....3..4.........4...5........1..6.....7..1..65..2..3.....4.783.. ........1.....2.....3..4.........4...5..6.....1.........2.7...6..4.9.3..87...1..5 ........1.....2.....3..4.........4...5..6.....6.........8.1...59.4...82...2.7..9. ........1.....2.....3..4.........4...5..6.....6........7.69...5..4.3.9....2.8...6

I got one 17, but unfortunately not "new". It's one of the 17 known clue puzzles with a 4-4-9 distribution.

JPF

PS: checker is still running, producing around 15 new 18's per hour...Edit: I stopped it!

by **blue** » Fri Nov 21, 2014 7:06 pm

For champagne.

(ED 4+4+27 and 3+5+27 patterns, after magic 40 filtering)

ed-35-44.zip

The New Sudoku Players' Forum

minimum number of clues per band/stack

Re: minimum number of clues per band/stack

Re: minimum number of clues per band/stack

Re: minimum number of clues per band/stack

Re: minimum number of clues per band/stack

Re: minimum number of clues per band/stack

Re: minimum number of clues per band/stack

Re: minimum number of clues per band/stack

Re: minimum number of clues per band/stack

Re: minimum number of clues per band/stack

Re: minimum number of clues per band/stack

Re: minimum number of clues per band/stack

Re: minimum number of clues per band/stack

Re: minimum number of clues per band/stack

Re: minimum number of clues per band/stack

Re: minimum number of clues per band/stack