The New Sudoku Players' Forum

[999_Springs]

Hidden Text: Show

I know girls who have had to deal with unwanted pregnancy in similar situations, and know what they would say about the valuable phone.

what? who leaves her BABY IN THE BACK OF A TAXI? EWWWWWWW

how she got prenyast.

prenyast

https://www.youtube.com/watch?v=EShUeudtaFg

Well am sure 999_Springs will be able to look after his phone now that he knows ....

here is a
........4....2.5....34...6..7........2..5.1....48....3....1.7....63...8..5....... ED=10.0/1.5/1.5

nice 10.0, yeah the thing is i'm really overprotective of my stuff so it makes me so upset when i lose things

i'm currently doing a vicinity search on all the 20's in champagne's database (he says there are 79 but i looked through the file and only found 35? can someone send me all of them plz) no results so far though i'll report back if i find something nice

edit:
mike posted an example of a 19-clue 9.8/9.8/3.8 here

Code: Select all

 . 1 . . 2 . . 3 .
 4 . . 5 . . 6 . .
 . . . . . . . . .
 . 3 . . 7 . . 1 .
 6 . . 4 . . 5 . .
 . . . . . . . . .
 . 2 . . 1 . . 7 .
 8 . . 6 . . 9 . .
 . . . . . . . . 8   ED=9.8/9.8/3.8

this was further discussed here by blue who found a 9.9/9.9/3.8 with the same pattern

Code: Select all

. 1 . . 2 . . 3 .
4 . . 5 . . 6 . .
. . . . . . . . .
. 2 . . 3 . . 1 .
6 . . 7 . . 4 . .
. . . . . . . . .
. 8 . . 9 . . 2 .
7 . . 6 . . 5 . .
. . . . . . . . 9   ED=9.9/9.9/3.8

[champagne]

79 in the data base, but as indicated earlier, more in my seed data base

Hidden Text: Show

5.......9.2.1...7...8...3...4...2.......5.......7.6.1...3...8...6...4.2.9.......5;11.60;11.60;3.40;20
5.......9.2.1...7...8...3...4.6.........5.......2.7.1...3...8...6...4.2.9.......5;11.80;11.80;3.40;20
1....67...5.........9....4......18.37...3.6.....2...9.3....8..1..........425.....;11.30;1.50;1.50;20
...4.....4....92...8..7...12.....5...3.....68.....5....1..6........1..739....4...;11.20;11.20;2.60;20
.2.4....9..6.8....7...3.........78..........1.9.5...2.3.....6.....2...94.1......5;11.20;1.20;1.20;20
.2.4....9..6.8....7...3.........78..........1.9.5...2.3.....6.....2...95.1......4;11.20;1.20;1.20;20
.2.4....9.........8....3.5....91....6....5.7..9......23.....6...1.7....4.....8.3.;11.20;1.20;1.20;20
........94...8.2.....7...1...15......6...7...9...4...33.....8......2...4..56...7.;11.20;1.20;1.20;20
...4.....4....92...8..7..1.2.....5...3.....68.....5....1..6........1..739....4...;11.10;11.10;2.60;20
.....6.8..5.1.9.......7...42.4.......8.6...9.....3...23.2.......6.8...1.........7;11.10;11.10;2.60;20
1.....7...5...9....8.3....42...6.....9.8....5.....4..........1..4...3..87...2.6..;11.10;11.10;2.60;20
.........4....9.2...81....62.....9.......43....75....13.....6.....86......1.7...5;11.10;11.10;2.60;20
.2...67..4...8......93.........7.....7...26.1......5.2..8.9..3...........1...5..6;11.10;1.20;1.20;20
.2...6.....718.......3....5..5.3...8......49..9...4.............6....92...18....7;11.10;1.20;1.20;20
.2.4...8....1....6..9.3......5......7.....9...1.2....43...7.5...4......8...6...4.;11.10;1.20;1.20;20
1..4...8..5...9..3..........3..759.......3..6..42.......2....1..9..6...78........;11.10;1.20;1.20;20
1....67......8......92....4.4.3...9......18....5.....3..........345...2.7.....6..;11.10;1.20;1.20;20
12...6...45....1..........6...9....86....12......3..7............78....3.1...54..;11.10;1.20;1.20;20
..34....9.5..8.2.............47......1..68........28..3.......7..9....3..6...15..;11.00;1.20;1.20;20
1...56......7....3....2..6.2...9..5...83....4.4........7......86....5.9...4......;11.00;1.20;1.20;20
1....6....5.7....1..8....4..1.3....7....4.8....9....2...2.9.....6.5.1..3.........;11.00;1.20;1.20;20
.....2..14...5..3....7..6.....6....7..3.8..4......12..5...4.....6.......3.9....8.;10.80;10.80;3.40;20
.....2..14...5..3....7..6.....6....7..3.8..5......12..5...4.....7.......3.9....8.;10.80;10.80;3.40;20
1.....9...3...7.4...5.....2.....6.7.....1.....4.3.8...9.......5.7.8...3...2...1..;10.70;10.70;3.40;20
1.......2.3.4...5...6...7...5.8.9.......1.........3.4...7...6...9...5.3.2.......1;10.70;10.70;3.40;20
2...9...7.6.....3...8...4.......6......51...97...2......4...8...3.....6.9..1....2;10.70;10.70;3.40;20
1.......2.3.4...5...6...7...8.3.5.......1.........9.4...7...6...4...8.3.2.......1;10.70;10.70;3.40;20
.....2..14...5..3....7..6.....6....7..3.8..4......12..5...4.....7.......3.9....8.;10.70;10.70;3.40;20
9.......6.7...3.8...2...4.......1.3.....6.....8.5.7...6.....2...5.8...7...4.....9;10.70;10.70;3.40;20
98.7.....6.....5....4.......7.8..9......3..4......2..1.5.9..6......4..3......1..2;10.80;10.80;3.40;20
98.7.....6.....5....4......5..8..6......4..3......2..1.7.5..8......3..4......1..2;10.80;10.80;3.40;20
..1...2...4...8.9.6.......7.....3.4.....2.....8.9.5...7.......6.9.4...3...2...1..;10.70;10.70;3.40;20
..1...2...3...4.5.6.......7.....3.8.....1.....4.9.8...7.......1.5.8...4...2...6..;10.80;10.80;3.40;20
........1.....2.3...4...5....2..36...1..7....8..9...4...3..4.2..7..1....9..8.....;10.50;10.50;3.40;20
........1.....2.3...4...5....2..6.5..7..1.4..8..9.......6..52...1..7....9..8.....;10.60;10.60;3.40;20
........1.....2.3...4.3.5....3..52...1.6.....7.......8..5..9.4..8.......6..1....7;10.50;10.50;9.60;20
........1.......23..3..45....2..63...7..1....8..9.......6..2.4..1..8....9..7.....;10.50;10.50;2.60;20
........1......23...2..45....3..6.4..1..7....8..9.......6..3.2..9..8....7..1.....;10.50;10.50;3.40;20
........1.....2..3..4...56...2..3.4..1..7....8..9.......3..62...7.1.....9...8....;10.60;10.60;2.60;20
........1.....2..3..4...25...3..4.6..7..1....8..9.......6..34...1..7....9..8.....;10.50;10.50;2.60;20
........1.....2.3...4...5.6..2..3.6..7..1....8..9.......3..62...9.8.....1...7....;10.60;10.60;2.60;20
........1.....2.3...4...5.6..2..6.4..1..7....8..9.......6..32...7..8....9..1.....;10.60;10.60;2.60;20
........1.....2.3...4...5.6..2..6.4..1..7....8..9.......6..52...7..8....9..1.....;10.60;10.60;2.60;20
........1.....2.3...3...4.5..2..6.5..1..7....8..9.......6..52...9.8.....7...1....;10.50;10.50;2.60;20
........1......23...4..5.6...2..6.4..7..1....8..9.......6..35...1..7....9..8.....;10.70;10.70;3.40;20
........1......23...4..5.6...3..6.5..1..7....8..9.......6..34...9..1....7..8.....;10.50;10.50;3.40;20
........1......23...4..5.6...3..7.4..6..8....9..1.......7..35...8..6....1..9.....;10.50;10.50;3.40;20
........1......23...4..5.6...2..3.5..1..7....8..9.......6..24...7..1....9..8.....;10.60;10.60;3.40;20
........1.....2.3...4...56...2..34...1..7....8..9.......3..6.2..7.1.....9...8....;10.50;10.50;3.40;20
........1.....2.3...4...56...2..54...7..1....8..9.......5..6.2..1..7....9..8.....;10.60;10.60;3.40;20
........1.....2.3...4...56...3..6.2..1..7....8..9.......6..34...9..1....7..8.....;10.60;10.60;3.40;20
........1.....2.3...4...56...2..64...1..7....8..9.......6..3.2..9.8.....7...1....;10.50;10.50;3.40;20
........1.....2.3...4...56...2..64...7..1....8..9.......6..3.2..1.8.....9...7....;10.60;10.60;3.40;20
........1.....2.3...4...56...2..64...7..1....8..9.......6..3.2..1.7.....9...8....;10.60;10.60;3.40;20
........1.....2.3...4...56...3..42...1..7....8..9.......5..3.4..9.8.....7...1....;10.50;10.50;3.40;20
........1.....2.3...4...56...3..42...1..7....8..9.......5..3.4..7..1....9..8.....;10.50;10.50;3.40;20
...........1..2..3.4..5..6.......1.7..7..32...8.....5...3..19..4..8.....6..4.....;10.90;10.90;2.60;20
........1......23...2..4.5...4..65...1..7....8..9.......6..2.4..7..1....9..8.....;10.50;10.50;3.40;20
........1.....2.3...4...52...2..54...1..6....7..8.......5..4.9..6..7....8..1.....;10.50;10.50;3.40;20
........1.....2.3...4...52...2..4.6..7..1....8..9.......3..64...9.7.....1...8....;10.50;10.50;3.40;20
..............1.23..4.5.6......7.5.....4......8...2.9...76......2...9.1.93......8;10.50;10.50;2.60;20
........1.....2.3...4....25..5..4.6..7..1....8..9.......6..54...9.7.....1...8....;10.60;10.60;3.40;20
........1.....2.3...3...45...2..3.6..7..1....8..9.......6..52...9.7.....1...8....;10.60;10.60;3.40;20
........1.....2.3...3...45...4..3.6..1..7....8..9.......6..42...9.1.....7...8....;10.50;10.50;3.40;20
........1.....2.3...3...45...2..46...1..7....8..9.......4..6.2..7..1....9..8.....;10.50;10.50;3.40;20
..............1.23..4.5.6.....5..7....564.....8...2.....69..5...3......88......1.;11.20;11.20;2.60;20
........1.....2.3...3...42...2..5.6..1..7....8..9.......5..62...7..1....9..8.....;10.60;10.60;3.40;20
........1.....2.3...4....56..2..34...7..1....8..9.......3..4.6..1..7....9..8.....;10.50;10.50;3.40;20
...........1..2..3.4..5..6.........7...64..5..7.58......9...2...5.7...8.3.......1;10.90;1.20;1.20;20
..............1..2..3.4.56.....5.6....6...47..8......9..5.6..3..2...9...1..8.....;10.70;10.70;3.40;20
..............1..2..3.4.56.......67...7.3..4..8......9..6.5.4...1.8.....9....2...;10.90;1.20;1.20;20
........1.......2...3..45.6..1..73...5..2....8..9.......7..64...2..5....9..8.....;10.50;10.50;3.40;20
........1.......2...1..34.5..3..65...2..7....8..9.......4..16...7..2....9..8.....;10.50;10.50;3.80;20
...........1..2..3.4..5..6.........7...68.....7.54..8...3...9...8.7...5.2.......1;11.10;1.20;1.20;20
...............123..4..5..6..1..34...7..2....8..9.......3..6..5.2..7....9..8.....;10.50;10.50;2.60;20
98.7.....76....5......5....6..8..9....4.3..2...........5.6..7......2..1......4..3;10.90;1.20;1.20;20
98.7..6..75...........6....5..8..9....4.3..2...........6.5..8......2...1.....4.3.;11.10;1.20;1.20;20
1.....7...6...3.9...4.....5.....9.6.....4.....8.3.2...5.......1.9.6...8...7...4..;10.50;10.50;3.40;20
9..7.....8.7...6...5.......4..6..9......3..5......2..1..69..7......1..3......5..2;10.50;10.50;3.40;20

[ghfick]

I may be slightly off topic here but these puzzles [starting with the 9.5 and before champagne's list] each have a 3x3 MSLS [with no extra cells needed]. I cannot recall ever seeing such 'small' MSLS's with only 9 cells and 9 digit covers. Philip Beeby's MSLS list does include some 3x3's but they all needed extra cells. Would these 3x3 MSLS examples be the smallest? Could there be a 3x2 or a 2x2?
Best
Gordon

[ghfick]

I have now found one of these puzzles with 2 [count em 2! different] 3x3 MSLS moves :
.1..2..3.4..5..6............3..7..1.6..4..5............2..1..7.8..6..9..........8
I cannot recall ever seeing a puzzle with 2 different MSLS moves [of any size!]. Each MSLS has 25 exclusions and they are all different.
Using Philip Beeby's solver :
Base: 237
9 cell Truths: r147 c147
9 links: 7r1, 2r4, 3r7, 59c1, 89c4, 48c7
25 eliminations: r1c3<>7, r1c6<>7, r1c9<>7, r4c3<>2, r4c6<>2, r4c9<>2, r7c3<>3, r7c6<>3, r7c9<>3, r3c1<>5, r3c1<>9, r6c1<>5, r6c1<>9, r9c1<>5, r9c1<>9, r3c4<>8, r3c4<>9, r6c4<>8, r6c4<>9, r9c4<>9, r3c7<>4, r3c7<>8, r6c7<>4, r6c7<>8, r9c7<>4
Base: 237
9 cell Truths: c258 r258
9 links: 89r2, 89r5, 45r8, 7c2, 3c5, 2c8
25 eliminations: r2c3<>8, r2c3<>9, r2c6<>8, r2c6<>9, r2c9<>9, r5c3<>8, r5c3<>9, r5c6<>8, r5c6<>9, r5c9<>9, r8c3<>4, r8c3<>5, r8c6<>4, r8c6<>5, r8c9<>4, r8c9<>5, r3c2<>7, r6c2<>7, r9c2<>7, r3c5<>3, r6c5<>3, r9c5<>3, r3c8<>2, r6c8<>2, r9c8<>2
Allan Barker's XSudo also finds these two moves [with different namings but, I think, the same logic]. The first is called a 'Complex Rank 0 Loop' and the second is called a 'Multi ALS + Cell Loop'

[Pat]

prenyast

otokorekt ?

m_b_metcalf posted a 19-clue 9.8/9.8/3.8

blue found a 9.9/9.9/3.8 with the same pattern

thanks!!
( another reminder of my failing memory )

[coloin]

Code: Select all

1...2.5..........9..8..3.............7..5.1....9..6..32..1..7.......9.6...3.....8 ED=10.3/10.3/3.8


It looks like the hard puzzles tend to have diagonal clues .... with 3 clues in one box and 2 in the eight others

and they can all be morphed into a box159 configuration

Code: Select all

+---+---+---+
|1..|...|...|
|.2.|...|...|
|...|...|...|
+---+---+---+
|...|3..|...|
|...|.4.|...|
|...|..5|...|
+---+---+---+
|...|...|...|
|...|...|.6.|
|...|...|..7|
+---+---+---+ 

To put 2 clues in each 6 boxes
9*4 / 2 = 18 ways
18^6 = 34012224

row and band swaps can reduce this by 6 , 2^5 = 177147 patterns would be an upper limit perhaps ...

As a guess probably there are around 2000 puzzles per pattern

so I would say a few patterns to test to get the definitive answer !

[coloin]

And trying to see how many 19Cpatterns with the diagonal {322222222} pattern there are ...

The representatives of the 15 27C diagonal patterns [ EDIT 3 more were foiund... making 18]
here - only 15, now 18

Code: Select all

#01# ..1..2..3.2..1..4.5..6..1....2..4..1.5..6..7.7..2..3....7..5..8.8..7..9.9..3..2.. #   C27/S4.da/M1.16.3   
#02# 2...4...6..4..2.3..7.8..1....24...1.1...3...2.3...54....5..9.7..1.6..2..6...7...9 #   C27.M/S4.da/M1.31.2
#03# ..2..3.1..3..1.2..5..6....4..5..7.2..9..4.8..6..9....7.8..9..5.2..5..4....3..8..9 #   C27/S2.d/M1.33.1   
#04# ..1.2.3...2...1..43..5...6...42...8.9...3...2.3...67...4...3..75..8...4...2.6.1.. #   C27.M/S2.p/M1.13.4
#05# 1....2..3.9..4..1...73..5....21....9.6..2..5.9....56....3..41...7..8..2.2..6....8 #   C27.M/S4.da/M1.11.6
#06# 2...3.1....14...2..5...6..3.6.2..4..3...5..7...7..3..65..8..7...9..1..4...6..2..9 #   C27/S2.d           
#07# .2..7...84..6..9....5..4.7..1.2..3..2...1...4..3..5.6..9.5..6....1..7..37...3..5. #   C27.M/S4.da/M1.16.1
#08# 1..3..2...2..4..1...3..6..52...8..7..7.5..3....9..1..67...9.5...4.1....8..8..2.6. #   C27/S2.d           
#09# ..2.1.3...1...2.4.5..3....2..5..7.8.6...3...4.4.6..9..7....4..6.3.2...5...4.9.7.. #   C27.M/S4.da         
#10# ..1..2..3.2..1..4.3..5..6....51..2...4..7...12....8.3...96...7..6..4.3..8....7..4 #   C27 [asymmetric]   
#11# ..1..3..2.2..4..3.4..6..5....23...1..4...57..5...9...8..6.8..7..9.1..6..7....2..1 #   C27/S2.d           
#12# 2..1....3..1..2.4..5..3.6..5..7...9...6.8.2...8...4..1..7.6..8..6.4..1..3....7..5 #   C27/S4.da           
#13# 2...3.1....14...2..5...6..3.6.2..4..3....4.7...7.8...65..8..7...9..1..4...6..2..9 #   C27/S2.d           
#14# 6....2.7...8.1...5.9.5..3....2..1..3.1..2..4.5..3..2....4..8.9.1...9.8...3.4....7 #   C27.M/S4.da         
#15# ..1.2...3.2...34..5..1...6...4..1.7.2...9...6.6.4..8...9...2..8..69...1.3...5.7.. #   C27.M/S4.da

I removed 8 clues from the asymmetric C27 pattern [#10#] to leave a 19C pattern
[ 1 clues from each box - all ways] 9* 3^8 = 59049
Just in case each box is not the same ....

this was confirmed by the process , and isomorphic patterns removed leaving

for #10# there were 29565 ED 19C {322222222} patterns
for #01# there were only 172 ED 19C {322222222} patterns

of course just to scupper the theory .... there may be harder puzzles which dont have the diagonal pattern in the box with 3 clues

Code: Select all

+---+---+---+
|1..|...|...|
|...|.7.|5..|
|..3|8..|.9.|
+---+---+---+
|...|.3.|...|
|4..|.5.|1..|
|..8|..6|..3|
+---+---+---+
|...|.1.|7..|
|..6|3..|.8.|
|5..|...|...|
+---+---+---+  ED=10.4/1.2/1.2


Code: Select all

1............7.5....38...9.....3....4...5.1....8..6..3....1.7....63...8.5........ ED=10.4/1.2/1.2


[mith]

Hi all, new here! I've been generating puzzles for a few months, and only recently came across this forum.

I've been (independently) playing with the pattern mentioned here:

edit:
mike posted an example of a 19-clue 9.8/9.8/3.8 here

Code: Select all

 . 1 . . 2 . . 3 .
 4 . . 5 . . 6 . .
 . . . . . . . . .
 . 3 . . 7 . . 1 .
 6 . . 4 . . 5 . .
 . . . . . . . . .
 . 2 . . 1 . . 7 .
 8 . . 6 . . 9 . .
 . . . . . . . . 8   ED=9.8/9.8/3.8

this was further discussed here by blue who found a 9.9/9.9/3.8 with the same pattern

Code: Select all

. 1 . . 2 . . 3 .
4 . . 5 . . 6 . .
. . . . . . . . .
. 2 . . 3 . . 1 .
6 . . 7 . . 4 . .
. . . . . . . . .
. 8 . . 9 . . 2 .
7 . . 6 . . 5 . .
. . . . . . . . 9   ED=9.9/9.9/3.8

Searching in the neighborhood of these has yielded a few more 10s so far which have not been posted as far as I can tell:

Code: Select all

...........1..2..3.4..5..6............2..1..7.5..6..4......6.....3..7..1.8..4..9.   ED=10.4/10.4/3.8
...........1..2..3.4..5..6............2..1..7.6..8..5............76.3..2.8..9..4.   ED=10.4/10.4/2.6
...........1..2..3.4..5..6............2..1..7.5..6..4............3..74.1.6..8..9.   ED=10.4/1.2/1.2
...........1..2..3.4..5..6............2..1..7.6..8..9............7..34.2.5..9..8.   ED=10.3/10.3/2.6
...........1..2..3.4..5..6............2..1..7.5..6..4......5.....3..7..1.6..8..9.   ED=10.1/1.5/1.5

I was originally interested in this pattern due to the high number of Swordfish to be found - and in fact all five of these preserve a pattern of offset 3x3s containing 1/2/3/7 and 4/5/6/8/9 respectively, plus one extra given.

(Expanding to 20 givens has resulted in some easier puzzles with some nice properties, including a few that SE uses a full 9 Swordfish to solve.)

[mith]

Oh, and coloin's most recent actually gets a 10.5 when rated in minlex form:

Code: Select all

...........1..2..3.4..5..6.........1..2..3...5..7..24.........2..3..8...7..4...5.   ED=10.5/1.2/1.2

It also has the highest q2 of the ones I've checked (97491).

One more I found last night:

Code: Select all

...........1..2..3.4..5..6............2..1..7.6..8..4............3..7..9.8.96..5.   ED=10.4/10.4/3.8

[mith]

Updated list to include q2 and hardest tech for ER, along with newly found ones:

Code: Select all

...........1..2..3.4..5..6............2..1..7.5..6..4......6.....3..7..1.8..4..9. q2=95240 FNBP C19.m/M2.51.128 ED=10.4/10.4/3.8 - Dynamic Region Forcing Chains (+ Forcing Chains)
...........1..2..3.4..5..6............2..1..7.6..8..4............3..7..9.8.96..5. q2=25360 FNBP C19.m/M2.98.66  ED=10.4/10.4/3.8 - Dynamic Region Forcing Chains (+ Forcing Chains)
...........1..2..3.4..5..6............2..1..7.6..8..5............76.3..2.8..9..4. q2=55639 FNBP C19.m/M2.96.68  ED=10.4/10.4/2.6 - Dynamic Contradiction Forcing Chains (+ Forcing Chains)
...........1..2..3.4..5..6............2..1..7.5..6..4............3..74.1.6..8..9. q2=36641 FNBP C19.m/M2.145.45 ED=10.4/1.2/1.2  - Dynamic Region Forcing Chains (+ Forcing Chains)
...........1..2..3.4..5..6............2..1..7.5..6..8............75.3..2.6..9..5. q2=10174 FNBP C19.m/M2.18.364 ED=10.4/1.2/1.2  - Dynamic Region Forcing Chains (+ Forcing Chains)
...........1..2..3.4..5..6............2..1..7.6..8..9............7..34.2.5..9..8. q2=53576 FNBP C19.m/M2.34.576 ED=10.3/10.3/2.6 - Dynamic Contradiction Forcing Chains (+ Forcing Chains)
...........1..2..3.4..5..6............2..1..7.5..8..9............34.7..1.6..9..8. q2=53007 FNBP C19.m/M2.34.576 ED=10.3/10.3/2.6 - Dynamic Contradiction Forcing Chains (+ Forcing Chains)
...........1..2..3.4..5..6............23....775..4..8........4...37....2.6..8.... q2=31021 FNBP C19.m/M2.52.126 ED=10.3/1.5/1.5  - Dynamic Region Forcing Chains (+ Forcing Chains)
...........1..2..3.4..5..6............2..1..7.5..6..4............36.7..1.8..9..5. q2=27786 FNBP C19.m/M2.175.37 ED=10.2/1.2/1.2  - Dynamic Cell Forcing Chains (+ Forcing Chains)
...........1..2..3.4..5..6............2..1..7.5..6..4......5.....3..7..1.6..8..9. q2=49603 FNBP C19.m/M2.133.49 ED=10.1/1.5/1.5  - Dynamic Contradiction Forcing Chains (+)
...........1..2..3.4..5..6............2..1..7.5..6..8......79.1..3.......8.4...5. q2=13166 FNBP C19.m/M2.70.93  ED=10.0/10.0/2.6 - Dynamic Contradiction Forcing Chains (+)

[coloin]

Excellent work
What really surprised me was the severe rarity of “diamond” puzzles with 18 and 19 ( and 17) clues
I think I posted a 19C which ED 9.0/9.0/9.0 which may well be more worthy aesthetically.
And these are the highest diamond-likes I could find subsequently with 19C

Code: Select all

......5...7..2......38....64............5.1..8.96....3.2..1.7....69....4......... ED=9.6/9.6/9.0   19C
..........4..2.5....36...1...18...3.....7.2..8.9.......5..4.7....63...9.......... ED=9.5/9.5/9.2   19C
1...275.......8.....4.....9.........8...5.1....96....32...1.7....63....4......... ED=9.5/9.5/9.2   19C

Certainly any diamond 18C ( >/6.7 ) is a find .

Code: Select all

..........1..4.8....3..6.7...........8..1.2....6..7..9.2..8.1....9....63......... ED=9.6/1.5/1.5   18C
1....4......29...5..6...3...4.......2...5.1..8......6.........4..7..8....5......9 ED=8.6/7.3/6.7   18C
1....4......29...5..6...3...4.......2...5.1..8......6...7.....4.....8....5......9 ED 7.3/7.3/6.7   18C with transversal

There is only one 20C in the top of the hardest file which is >/9.5 ...

Code: Select all

........1.....2.3...4.3.5....3..52...1.6.....7.......8..5..9.4..8.......6..1....7;10.50;10.50;9.60;20

And a version of the highest rated 17 clue puzzle, for the record.

Code: Select all

 ..............1.23..456...............7.8.4...1...25.....6......2.....1.3...4.... ED=9.1/1.5/1.5   17C

[mith]

I haven't really searched much at 19C apart from in the neighborhood of the diagonal pattern discussed earlier, which is by nature almost guaranteed to have a Swordfish available at the start. Will have to think of some different patterns to search on.

[mith]

One more 10.4:

Code: Select all

...........1..2..3.4..5..6............2..1..7.5..6..8........9...7..3..2.6.4..8..  ED=10.4/10.4/3.4 (DCFC+FC)

I've had my new script running about a day, have found about 5000 puzzles with skfr_ER>=9.2 and this is the only new one above 10 (10.2). I'll check with SE on some of the high 9s at some point.

[mith]

Found a new 10.5:

Code: Select all

...........1..2..3.4..5..6.......1.2..3..7...8...4..5......3..7.9..8....5......8.  ED=10.5/6.7/2.6 (DRFC+FC)

A few more 10+ skfr_ER to check, as well.

[mith]

A full list of the ones I've found so far (ER>=10.2), including those listed above:

Code: Select all

...........1..2..3.4..5..6.......1.2..3..7...8...4..5......3..7.9..8....5......8.  ED=10.5/6.7/2.6  (DRFC+FC) q1=65857 q2=35265
...........1..2..3.4..5..6............2..1..7.5..6..4......6.....3..7..1.8..4..9.  ED=10.4/10.4/3.8 (DRFC+FC) q1=64831 q2=95240
...........1..2..3.4..5..6............2..1..7.6..8..4............3..7..9.8.96..5.  ED=10.4/10.4/3.8 (DRFC+FC) q1=95149 q2=25360
...........1..2..3.4..5..6............2..1..7.5..6..8........9...7..3..2.6.4..8..  ED=10.4/10.4/3.4 (DCFC+FC) q1=48973 q2=4041
...........1..2..3.4..5..6............2..1..7.6..8..5............76.3..2.8..9..4.  ED=10.4/10.4/2.6 (DCFC+FC) q1=46205 q2=55104
..............1.23..4.5.6.......2.....7.6...4.8.....9..1........2...9.8.6.5.7....  ED=10.4/2.3/2.3  (DCFC+FC) q1=63764 q2=95167
..............1.23..4.5.6.......2.....6.7.4...8.....9..1........2...9.8.7.5.6....  ED=10.4/2.3/2.3  (DLFC+FC) q1=13757 q2=2205
...........1..2..3.4..5..6............2..1..7.5..6..4............3..74.1.6..8..9.  ED=10.4/1.2/1.2  (DRFC+FC) q1=43184 q2=36641
...........1..2..3.4..5..6............2..1..7.5..6..8............76.3..2.6..9..5.  ED=10.4/1.2/1.2  (DRFC+FC) q1=95304 q2=10481
...........1..2..3.4..5..6............2..1..7.5..6..8...........6..9..5.5.7..3..2  ED=10.4/1.2/1.2  (DRFC+FC) q1=95304 q2=10481
...........1..2..3.4..5..6............2..1..7.5..6..8............75.3..2.6..9..5.  ED=10.4/1.2/1.2  (DRFC+FC) q1=95303 q2=10174
...........1..2..3.4..5..6............2..1..7.5..6..8............7..36.2.6..9..5.  ED=10.4/1.2/1.2  (DRFC+FC) q1=95303 q2=10174
...........1..2..3.4..5..6............2..1..7.6..8..9............7..34.2.5..9..8.  ED=10.3/10.3/2.6 (DCFC+FC) q1=95126 q2=53786
...........1..2..3.4..5..6............2..1..7.5..8..9............34.7..1.6..9..8.  ED=10.3/10.3/2.6 (DCFC+FC) q1=95219 q2=53007
..............1..2..3.4..5...45...6..2...7....8......1..6.3.4...1...8..78........  ED=10.3/9.8/2.6  (DRFC+FC) q1=36345 q2=65223
..............1.23..4.5.6.......2.....7.6.4...8.....9..1........2...9.8.6.5.7....  ED=10.3/2.3/2.3  (DLFC+FC) q1=21320 q2=3528
...........1..2..3.4..5..6............23....775..4..8........4...37....2.6..8....  ED=10.3/1.5/1.5  (DRFC+FC) q1=17181 q2=31021
..............1.23..4.5.6.............5.6.4...1.2....7......5....6.4....52.8...1.  ED=10.3/1.5/1.5  (DCFC+FC) q1=9060  q2=1183
..............1..2..3.4..5......2..6..4.5..3..1......5..5.3.4...2......1.7...8...  ED=10.3/1.5/1.5  (DCFC+FC) q1=8995  q2=1181
..............1..2..3.4..5......2..6..4.5..3..1.........5.3.4...2...5..1.7...8...  ED=10.3/1.5/1.5  (DCFC+FC) q1=8991  q2=1181
...........1..2..3.2..4..5......1.....3.....6.5..2..4......3..1..7..8....4..5.2..  ED=10.3/1.5/1.5  (DCFC+FC) q1=8945  q2=1176
...........1..2..3.4..5..6............2..1..7.5.8..4.......7.....3.2...1.6.5..8..  ED=10.3/1.2/1.2  (DCFC+FC) q1=42753 q2=8011
..............1.23..4.5.6.............5.6.4..14.2....7......5....6.4....2..8...1.  ED=10.3/1.2/1.2  (DCFC+FC) q1=9058  q2=1183
..............1..2..3.4..5......2..6..4.5..3..1.........5.3.4...2......1.7...85..  ED=10.3/1.2/1.2  (DCFC+FC) q1=8996  q2=1181
..............1..2..3.4..5......2.46..4.5..3..1.........5.3.4...2......1.7...8...  ED=10.3/1.2/1.2  (DCFC+FC) q1=8989  q2=1181
..............1..2..3.4..5......2..6..4.5..3..1.........5.3.4...2......1.7...8..3  ED=10.3/1.2/1.2  (DCFC+FC) q1=8996  q2=1181
..............1..2..3.4..5......2..6..4.5..3..1.3.......5.3.4...2......1.7...8...  ED=10.3/1.2/1.2  (DCFC+FC) q1=8993  q2=1181
..............1..2..3.4..5......2..6..4.5..3..1.........5.3.4...2.4....1.7...8...  ED=10.3/1.2/1.2  (DCFC+FC) q1=8990  q2=1181
..............1..2..3.4..5......2..6..4.5..3..1...4.....5.3.4...2......1.7...8...  ED=10.3/1.2/1.2  (DCFC+FC) q1=8990  q2=1181
..............1.23..4.2.5.......6..1..5.4.2...3.........25..4...1...3....7......8  ED=10.3/1.2/1.2  (DCFC+FC) q1=8882  q2=1168
..............1.23..2.4.5.......3..6..4.5.2...1.........5.2..4..3......1.7...8...  ED=10.3/1.2/1.2  (DCFC+FC) q1=8951  q2=1156
...........1..2..3.4..5..6.........1..2..3....5..7.4....3..1..2.1.4..5...8.......  ED=10.2/1.5/1.5  (DLFC+FC) q1=95018 q2=1985
...........1..2..3.4..5..6.........1..2..3....5.27.4.....4..5....3..1..2.8.......  ED=10.2/1.5/1.5  (DLFC+FC) q1=95018 q2=1985
...........1..2..3.4..5..6.........7..31....46...4..5....3.......8.....1.5..6..4.  ED=10.2/1.5/1.5  (DLFC+FC) q1=95015 q2=1435
...........1..2..3.4..5..6............2..1..7.5..6..4............36.7..1.8..9..5.  ED=10.2/1.2/1.2  (DLFC+FC) q1=43494 q2=27786
...........1..2..3.4..5..6.........1..2..3....5..7.4....3..1..2.8.......2..4..5..  ED=10.2/1.2/1.2  (DLFC+FC) q1=95018 q2=1985
...........1..2..3.4..5..6.........1..2.13....5..7.4.....4..5....3..1..2.8.......  ED=10.2/1.2/1.2  (DLFC+FC) q1=95018 q2=1985
...........1..2..3.4..5..6.........1..2..3...15..7.4.....4..5....3..1..2.8.......  ED=10.2/1.2/1.2  (DLFC+FC) q1=95018 q2=1985
...........1..2..3.4..5..6.........1..2..3....5..7.43....4..5....3..1..2.8.......  ED=10.2/1.2/1.2  (DLFC+FC) q1=95018 q2=1985
...........1..2..3.4..5..6.........7..31.....6...4..5....3..5....8.....1.5..6..4.  ED=10.2/1.2/1.2  (DLFC+FC) q1=95015 q2=1435
...........1..2..3.4..5.16........7..6.4.....3....1..2...6.......2..3..1.8.....4.  ED=10.2/1.2/1.2  (DLFC+FC) q1=95018 q2=1435
...........1..2..3.4..5..6.........7..31..6..6...4..5....3.......8.....1.5..6..4.  ED=10.2/1.2/1.2  (DLFC+FC) q1=95015 q2=1435
...........1..2..3.4..5..6.........7..31.....6...4..5....3....6..8.....1.5..6..4.  ED=10.2/1.2/1.2  (DLFC+FC) q1=95015 q2=1435
...........1..2..3.4..5..6.........7.5..6..4.2..3.........4..5..6......43....8..2  ED=10.2/1.2/1.2  (DLFC+FC) q1=95026 q2=1431
...........1..2..3.4..5..6.........7.5..6..4.2..3.........4..5..65......3....8..2  ED=10.2/1.2/1.2  (DLFC+FC) q1=95026 q2=1431
...........1..2..3.4..5.16........7...2..3..15..6..........1..2..3......6...8..5.  ED=10.2/1.2/1.2  (DLFC+FC) q1=95025 q2=1431
...........1..2..3.4..5..6............2..3..13..67.4.......1.....3.....2.6.4...8.  ED=10.2/1.2/1.2  (DRFC+FC) q1=9027  q2=1208

[edit]The highest ED I have so far is this one:

Code: Select all

...........1..2..3.4..5..6............2..3..7.5..6..8....9.1.....3..7..9.8.....4.  ED=9.4/9.4/9.2 (DCFC)